LARGE FOSSIL FORAMINIFERA FROM CUBA BY DOl!O'I 'H¥ l<, La Habana, Cuba JJ cscr izJtioltS of two ucw ocncm and f ottrt eeu uew ,qpecics tft4 ' U JlfJCI' Cre laciJOilS cuul Lower 7'crtiary of Cuba. T he couelaL i on of the U1 · etaeeonH a 1Hl 'f crtiary strata in tho counlries bm· d('J'ing th e Gu lf of Mexico and the Uaribbean Sea is an i mportant problem of American paleontology. 'l'owar d the solution of this problem the stu dy of Onha11 faunas makes valuable contributions. Th e Cu ban fau nas of Upper Uretaccous. a 11 d 'l'ert iar y age are impor tant not onl y because of their divei' Hity an d good preservation but a lRo because they alt ot· d a eo nnccting link be- twetm the great groups o l' tl'opieal of noJ ·tlleru AnH• rica and :: Hexico a11d the more temper ate fa unas of t he GuH Sl ates. ' L'h. c "fossil faunas of Cuha arc ri ch and va l·i ed. 'l'hey co m- prise abundant i'or aminif.rra, ra di olaria, mollusca, echinodcrm- ata, molluscoidea, coclent eruta, ostracoda a nd ci t'l'ipeclia a nd oc- casional crustacea and fish remains. Dming the past twenty ye ars impor tant haR heen made in deciphe ri ng the geologica] hi iol to ry of th(' Gul£ States, eastern Mexico and nortl wr n Sonth America by t. he in tensive study of the foraminif e ra l fa unas wh ich has been incident to the expam;ion of the petroleum indust ry in these ar eas. E lsewhere in t.ho '\>Vest lnd ies dur ing t hi s peri od the paleontological WOl' k was largely con fin ed to t he st ud.'' of small collections, c hi e [ly molluscan, fr om isolated areas. Recently, howt>vet· , tbe explor- at ion of Cuba for pe tro leum has given an impe Lns to Lhe de- tail ed s tudy of ' t.h e foram inifen d ·f au11 as o£ t.he island. 'l'he most co nspicuous fossil for aminifera of Cuba ar c, be- cause of their size, t he orbitoids a nd large ar enaceous and por- 2S5 BIBLfOTEC
Transcript
~OME LARGE FOSSIL FORAMINIFERA FROM CUBA
BY DOl!O'I'H¥ l<, PA J ,M I~It
La Habana, Cuba
JJcscrizJtioltS of two ucw ocncm and f ottrteeu uew ,qpecics {ron~ tft4' U JlfJCI' CrelaciJOilS cuul Lower 7'crtiary of Cuba.
T he couelaLion of the U1·etaeeonH a1Hl 'f crtiary strata in tho counlries bm·d('J'ing the Gu lf of Mexico and the Uaribbean Sea is an important problem of Amer ican paleontology. 'l'owar d the solution of this problem the stu dy of Onha11 faunas makes valuable cont r ibutions.
The Cuban faunas of Upper Uretaccous. a11 d 'l'ert iar y age are important not only because of their divei'Hity and good preservation but a lRo because they altot·d a eonnccting link betwetm the gr eat groups ol' tl'opieal 1;~1t1nas of noJ·tlleru So~tth
AnH•rica and ::Hexico a11d the more temperate fa unas of t he GuH Slates.
'L'h.c "fossil faunas of Cu ha arc rich and val·ied. 'l'hey comprise abu ndan t i'oramin if.rra, r adiolaria, mollusca, echinodcrmata, molluscoidea, coclenterut a, ost racoda and ci t'l' i peclia and occasional crustacea and fish remains.
Dming the past twenty years important progt·e:-;~ haR heen made in deciphering the geologica] hi ioltory of th(' Gul£ States, eastern Mexico and nor tlwrn Sonth America by t.he intensive study of the foraminiferal fa unas wh ich has been incident to the expam;ion of the pet roleum industry in these areas. E lsewhere in t.ho '\>Vest lndies dur ing t his period the paleontological WOl' k
was largely confined to t he stud.'' of small collections, chie[ly molluscan, from isolated areas. Recently, howt>vet·, tbe exploration of Cuba for petroleum has g iven an impeLns to Lhe detail ed study of' t.he foram inifen d ·fau11as o£ t.he island.
'l'he most conspicuous fossil foraminifera of Cuba arc, because of their size, t he orbitoids and large arenaceous and por-
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BIBLfOTEC
Univet·sidad de la JJ abana [Vol. 8, N9 -t
eellaneons fo1·ms of the Uppe1· Cretaceous and Lower 'l'ertia ry . These forms, characterizing the shallow-water accumulations occur in abundance in the calcat·eous shales, lime gravels and clastic limestones. The intcrbebclt>cl white and tan mal'ls of deeper wMcr origin carry m.vriads of beautifully pt·eHer·vecl small foraminifera.
D 'Orbigny's classic monograph of Cuban recent fot·aJninifera is a monumental contt·ibution to t11c lo10wl cclgc of this Ol'(leJ' or animals. The f ossil forms await a similar trPatment. f.Jess Lhan a dozen short papers, n> dea ling chiefly with t he large species, COJ'lstitute the li tet'aturc of the fossil £oramini·l1eJ·a of Cuba.
A nuuJI)el· of characteristic large foPamiHifc J·a arc hcl'c in descl'ib-cd. In tl1e preparation of those dcscJ·iptions generous assistance lu·ls heeu given by Drs. '1'. W. Vaug-han, .J. J. Galloway fUJcl W . .S. Cole. To Dr. P. J. Be1·mndez, of the Havana UHivcrsit,y, the author is indebted for the rnany hotl!'S he has spent in the collf'ction of materi<JJ and tho preparation of' th in sections. Scripps Institution of Oceanography permitted Dr. E. M. 1'horp to devote his time and efforts to tho making of tlw photographs. The drawings of the Cretaceons cameriuids were made h.r Mr. Alex. Rierig of Havana.
(L) C1tslml(m, .1. A. Fossil foraminifera from tho West Indies. CarIJOgie Just. Wnsh. Pnbl. 291, 1919, pp. 21·71,
Gra·uefl, D. W. 'I'he genus Orbit~Fide.~ in Amcr·ira, with dE>scription of 11 nl'w speS'ios from Cuba. .Journ. Pal., vol. 4, NY :J, p. 268.
/l:(liiJ, 7>. F. Gali<Jleayina Tn·owui, a nrw genus aud specie's of or·bitoicl from Cuba, with notes ou the Amcriro.n occtii'I'Onco of OmJihaloi'tlrlu.~
111M'7'0ll01'a. Am . Mus. Novitatos, N9 568, l!l.32.
1'mt,r;lian, '1'. IV. Report 011 species of co r·:lls nurl lnrgor fol'flnainifeJ'It t'ollcctod irt Cuba by 0 . J<:. Moil1zer. .Jour·. Wnsh . Acncl. Sci., vol. 23, NY 7, 1933, p. :~52.
Studio.~ of Atneric:aH species of fonmri niforn of 1:11 0 goau11 1:-r111;rlooycl'ina .• Hmit h. llfisc. Coli ., voJ. 89, N9 10, 19llx.
A note on Ot·7Jito·ir.7c.~ bTowni (Ellis). ,J Oil I'. Pnl., vol. 8, NY J, 1931, p. 70.
7Jnl111('7', D. 7[. 'l'he Uppm· Cretaccom; ngo of tho o t·bit:oi!lal genus Oallowa!Jiua Ellis. .Jour. Pal., vol. 8, Nv J, 19:3·1, JJ. fl8.
'l'lro, foraminiferal genus G?tmbelina. in the 'l'r rtinry of Cnbn. ~lcm. Ro~. CulJtllla d(' JTistoria Natur:ll, vol. 8, NQ 2, 19:ll, pp. 73.76.
236
Oetubr~ 25, 193·1) M emol'ias (le la Sociecla.d Poeu
. .. d e .imens have been de* The holotypes, cotypcs lll_ld ~JgUrP,. osp c ography La Jolla, . S .· lnstJtntJon OJ. cean '
posi ted m the Cllpps . . l . the Musco Poey, Hav-lifornia Paratypes are dt>posttcc 111 . ~:H Unive-rsity, and in the 'Palmc•t· Collt>ctlon.
. f ' I P',r··Pol·te . composed · 1 ] ·cons me v ' · ' ' · 'rest nearly sphcl'loa ' en em . I · .. ' 1 ir·r·e•,.nlarly concentnc 1 I ·:-; 'll'l"llWP< ' n fll "' l 1' of low ar(llJI'ltC e 111.111 IP.I , ' , ' ,'=' 1 of a thin, f inely por~us , aye . nlanner. Cl1ambcr wn lls .cornp( selc .. of' ''t'brous material. Ap. ( . . ., r 111clt Hi }) nYPI . J. T
outside and tl1SJC.e 0
w · . th'c lla!ie of thr chambers. ' uertures in chamhrr walls .n~,cl at . . . 5 I . mber s surrounded by veuarium central, compNsm~ll~,.~l s~1iJ~c~: or labyrinthic ca nals 11. thic•k. fihrons wnll. 0 PI • · • ·
present. . . 11 , s 1hCJ·ical 0 llLphal.ocyc~us, re-'I'he new O'euns ls <'Sscnt.Jn ,\ 11 1 . f thr jn\'enarmm or
sembling that gt>nus it~ th e. duu·;:~;e~~aJ:be~· w~lls. ~t differs nucleoconch and ~he ~h 11?~~~s~i~~ ~phe1·iea1 instead of lncoucavefrom Om,phnlocyr~u.~ m pc.ss . . "'
discoidal shape. . 1
.· 1 manner of S I " 'psina in Jts sp t01JCa . Ton·ei?w r escm hles P wr og.'J . . 1 ,_ . cter of the JU-
. . . I 1 ft·om 1t by L IC caata <Yrowth but i!i chs1:ll1gllls tee . lt' le layered instead of "' · 1 · ·bitoichl the mu 1P · • ·· 't venarinm WhlC l IS OL , ' Jl· a lcl the inclefJU1 e
' t ,. the ch·unhct· wa s I si11"'le-1ayer strnc tll'C 0.1. ' t
0.e the chambers.
, eo • .. • l' J arran "'Cmen l rath('r than very dcfm1te rae •a . ~ . , . T) '1'(!-i?-UI t01'1'(J1 n. gen., n. sp. r'
Genoholo/ype. . r.1 • . • o£ Cuba 's great natnra lst, 'I'l1 e TIE'W genus is n~tmetl Jil honot Dr. Ca1·l os cle ln. 'l'ol'l'c.
Torreina torrei n. sp.
(PLA'J'lr. 1 2, ])'JOURir.S 1 llll cl 4·)
. ' 5 . :'! mm. in diameter; nearly 'l'r!';t small for tll<' famll~ • 2 .. t.o re ·y fiMlv perforate. . 1 · 1 . )(> W·1ll r•nlcarcous, ' 1• · d b ex*
sph<'l_'lra m s 1lt11J . • 'O!le,c' showin"' small pits forme Y $lpt>r.1111f'ns nsna Y eJ 1 "
posed chambers. 2~1
Uwilve1·sidad de la II abana (Vol. 8, Nq ·I
Mc:>gMlosplwric forms only have been found. Juvcnarium central, suhsp herical or oval, .21 to .5 mm. in diameter, comprising 4 01· 5 unequal chamhet·s surrounded by a thick (.0-+ mm.) fibrous, finely perforate wall. •rest constructed of vcr.r low, arcuate or meniscus-shaped chambers, .1 to .2 mm. in diamt'tN·. Chatnbt't·s al'l'anged in a rather irregularly conceutrie Jwmucr about juvt'Mrium, those of one ring alternating in position with those o( the aajacent l'il1gs, r esult ing in a tendency toward radia 1 arra rJ..g<,m<-'nt, t hough this tendency is not marhd. ln t angential sections the chambers ar c neal'ly circu lar. Cham her walls cot tHist oC a very thin ( .OOG mm.), dark, finely porow; layer, outside and inside of which there is a. thicker layer of Jightc1· colm·ed, t ra.n:;vf:'r sely fibro tts ami w 1·y ·finely porous matm·i al. Chamhe1· walls wit h oval apertnre.s opening into nd· ;jacent chambers. N nmcrous ap~rtnt·es at the base ol' r.aeh chamber. Exterrial aper tnr·es probabl y i1J t he pits on the surface of the test.
Sections o£ 1'. ton·c1; closely resemble horizonta l sections of Orwplwlocycl us macroponts L. from Cuba but may be clisLinguish<'cl hy the mot·e at·cuate chambers which are well separated and n1·c not IIITnnged in as clefinitel:v conct-ntt·ic a llHlllfl{'l' .
Locality and oeologic horizon : The holot~'Jl<' was collected approximately 1 kilometer south of the batey of Uentral J esus Mm·ia, 13 kilometers southwest of 1\ilatanzas (Palmer Sta. !)09). The nC'w species is locally common. lt is nssociated with a charactt'ristir M ss<'tn hlage of Up per Crt>taceous !>twtll forami nife t·a, Omp1wlocytl1(S and O·rbiloides.
'l'l t<' new sp ecies i.s dedicated to Dr. Carlos de la Torre.
Family CA1\1ERINIDAE
Operculina. bermudezi n. ::;p.
(I'r,A'l'l•: 12, l!'JOUUES 3, 6·9)
'l'cst la rge, oomplanate, with prominent umbos and thickened, rouncl <'cl pe1·i pt1cry; smooth except to t· the lE' IHl ency toward the development of papilla e on the umbos and t he• spiral ri dg<> nHtrking the early mm·gin . Worn specimens liHIIally Rhow thP st'pta.
'l' hc horizontal section of an avcra~e-si r.cd specimen (about 5 mm. in d ia111eter) shows 4 to 4% whorls with approximalcly 31
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Octubre 25, 1984] ]ltlerno1'ias de la Socicdad Poey
chamber·s in the fina l volntion. 'l'he whorls incrf:'ase regularly but gradually in width aud t he Hepta are very gently curved, almost racliate, with conspicuous inL1·asept.a~ canals. I~ tangen~ tial horizo11tal seetion the branches of the mtra~eptal r.anals a~
ear in two altcruating rowl> aloug Lhc suture hnc ancl the pm forate structure of the test may lw clea.rly seen. F~rrows of the mar"'inal cora a 1·e dislinct. Aperture at base of septnm.
The ~ert.iea.l section ~:~hows the conspicu ous development of the mar"'inal cord antl cam1ls, lhC' temlency toward ~h~ develop
, t of."' I~ illars in the nmbonal region a nd t he pos1t10n of th e men, . ,. aperture.
1
Fw. J.-OrJcrctLlilla bcrm1u!czi n. sp. Early ehambers of megnlospheric specimen. x50.
Bot h mC'galospheric ancl miet·ospheric forms have been fourid. The former is not common and in external ch~l·act.ers may be distin"'n islwd on ly by its smalle1· size. Juvenanum. of the megalospheric for m composed of two chambers, the primary chamber beino- sl ight.ly the lar~er. J n a specimen with 3Yz whorls measuri1~g appm:ximatRly ~ n11n. in cl iameter the larges~ chamber of the mrgalosphcric j uvt'narinm ntl'asut·cs .2 rom. m ms:-iimum diameter , the sma lll~r chamber measures 1:3 nun. A spe men 8 mm. in di ameter wil.h 6 whorls hHs a nncrosphere measul'ing .026 mm. in diameter.
lJimens·irms : 0. uennnitez'i attains a diameter of. 12 rnrn., but specimens of t his size a t·c rare. Averar.e-sizecl. spec11~ens ar-e approxim ately f) rnm. in cl iamctcr witlt a thicknt~ss of ·2 mm.
Locaiifil's and geolooi.c hm·izon: The cotypes wet·e collected in the cut on the Cnrr dc>t·a Centntl below the railroad bridge at Central San Antonio, 2 kilometers west of :Madruga, Havana Province (Palruet· St.a. 7fl7 ) . The specimen figured to show the extental charactE"rs (Pl. 12, fig . 9) was collected 1 k ilometer
239
•
Uniuersiclad cle la Ilabana
south west of Madruga ( Pn lnwr !:-ita. 83:?). 'Ph«> figu i'Nl specimen showing the ear ly structure of the lllegalospht•J·c was col lected l.-1: kilomete1·s notth of Punta Bran1 on the I'Oild to Banta It'e, Ila vaua P roYince (Palmer Sta. 1 :31-1:) .
'l'hc ucw sp('cies is cOlnmoH in the l.;pJH.'I" Crctcacous of Cuba where it is associa ted with I'Udistids, <'choiHoitls ~111tl abundant fo l·aminifera, including OT·bitoide.s palmui a ra Vt• ll Nlld 0. browni . (Ellis).
'l'hc oul.v spceit's with wh ich 0. uenllltelc~i might he confttsccl is 0. catennln Cnshman and Jarvis <J> clcscribccl from the Upper C 1·etaceons oi sou theastem Trinidal1, H. W. 1. Unfortunately, 0. cctter~~ula. wa:,; not :Eig UJ·ed i11 secti.on; in e,~te 1·nul. cha racte!·r; it differs fr-om 0. be'l'mucl.ez i in its smnll t•t· :-.;ii'\e, wot·c r egu lar form a lid the possession of snl ural Ol'lllliiH'Ilta tiou.
'l'IJ<\ uc•w spec ies is dedicated to Dr. Ped1·o ,) . Het·w(ule7., one o[ Llw lll OHt ~ · rdhus i ast.ic aud incldatigahlc or the ,YOllllg' Cubaa uaturalists.
F'amily ?Planorbuilinidae
Genus V aughan ina new g-rnus
'l'est .. ve1·.r finely perforate, small, biconvl'x with a pCI'I(lheral flange for~_nrcl by !-he last few whorls of t.he N[llal.orilll ]a_ye t• COV('l'<'cl by fnw t·a.dwl plates wl1ic·h c:--h•JHI hrYo ncl the mar,...in 111.aking ~~ 1'1·inge-like border. Centra l arras o~cupircl by ma~e~ of· latPI'al ch~1~1hcrs at~cl pil la rs. B qnHt<wial layrr l'onrwcl hy a naJTOw, nndJvHl Nl SJllral tulw. Bet\\'cen th<· lntcr11 l chn m·bcrs fl.llcl _1 ht• c'qt~atorinl l a~·~1:, both abov<' all( ] hPiow, ar<• t h<' t.l1i11, vcr!:lcal l'lHhn l p la t.cs wluch ext.<'nd 1'1'0111 t l1e ceutc1· to the margin I'OI'IIIing the chara cteristic friug-e ol' the test..
M:cgal osph cri ~ form on ly l1n s bN' It id PuLi l'i t>.<l. 'I'h i ~ com pl'iRes 2 xmall spllfli' ICal ch;m1bers s1UTO tmclcLl hy a I'Clntivrl.r hea vy wall , succoc-decl ·hy a whorl of 5 o1· G lar!!t> <• hnutbr.1·s ·wl ti c:h in t tll"n arc fo ll owed hy t l1 r sp intl tul1c. ·
In ,<; tl)ltll'fic ial aspect the new genus s ug-geH t:s Pscu.rtrwbitoides ~I. Douville. IIo·wcver , it is en tir0ly <1 ist.i11ct 1'1·om th11 t. ge n UR HL Lhn t t.he eqtwtm·ial layer instead of being com po~!('cl o [ a t·cnatc - --- -
(1) Cushman, J. A. and .Jcn·uis, P. TV. Upper C•·ctaccous l'ornmiuifern from 'l'•·iui tlnd. Proc. U.S. )~'at. i\[u~., N9 2914, vol. RO, n•·t. 1'1, 19:l2, p. 42, pl. 12, fig. 13.
Octubrc 25, 1 9341 M emorias cle la SoC'ieclad. Poey
or polygonal chambN·s is a n unclividetl spit·~l tube. Radi~tin!!: lines an' desc1·ibed ahovC' t hr <'ctuatonal cham hers tn
Pseudorbitoides; vt•rticnl radial plat..!s nre d<'Yeloped in I' aughanina. hoth ahove and below the' t><plalorial layer and project beyond tlw margin as a VCI'Y chnnJCtel'istlc periphera l fringe. The equatorial la~·er of f'srndol'bifoirlcs is single at t~1e center of the test but composed or 2 or :~ la,\·e1·s at tlw per1phery. The ec1uatoria.l la~· ('r of Vc/III{Jhanina is single t hroughout .
'!'he family rel ationshi p of t·his genu1; is puzzling. The undividecl spiral tn be form i 11 g thp eqnat.orial layer precludes reference to the' 01·bitoic/.~iclae . I t i~-; trntat·iwly placed wi th th~ Plano'I'1J'IIl1iniclae.
G(l'nohol.r:f.ype : Vcwuhan•ina. ('nbtm .. ~·is 11. sp. The new g~>Jms is nalllcd ·i1'1 h011or· ol' Dr. '1'. 'Way land
Vaughan, who has contl'ihutcd l ur~ely to the rluciclation of the problems of the gco l og~· ;mel pa lc•ontolg-y of the Wl'St Inches.
Vaughanina cul:cnsis n. ~11-
(T'!, A':E 12, F iUUfH: ;))
( l't. t\'t'f: 1 :{, PIGJ.:RI'S :.! and ·~)
Test wt·.\· fin('ly perl'orntr; small. avet·age-sized specimens approximate!~· 2.5 mm. in diam<'l<'r; biconvex, one side nsually sli!!htl~· mm·r tumid than t hr ot hct· ; ccnt.t·al umbonate area sharply separated from the W<'ll drvel0!1ed pet·ipheral flange.
J<'Jo. ~.-V cr·ttohw ·itt<£ c·tr /i c•tt8iH 11. sp. ll'inp;rnunnntie horizoutnl Hection hn:,<'d on <·otype. x!lO. i::>howiug initial chnm· ber~ SI IITOUIH1 Cfl hy hcnvy wall, followed by an irreg· n l:ll' spim1 of lar1~l' C'!Himbt•a·H which iu turn is .;uc· cerdcd by I he IIIHI h'itlotl O:jU:ttorial tube. _At tho m:argiu a few l'lldinl plates m:ay be 8<'<'11 paRSHtg unclt•r th<' l'f(ll:ttnl'ia l luho.
J.'1u. :l .- l'tNt[!/ttwitw rullc·11si:; n. sp. \TE>rtienl Rection of cotype. x2:~.
U1
Universidad de la Jlabama [Vol. 8, N9 I
Thr most couspicuous feature of the sprcit>!; is the mnt·ginal flange. 'l'lus is undulating, .25 mm. in width in a vcrage-sized s pecimens and ft·equentl.r h11s onr ot· mot·e conspicuous notches; the construction of the flange is given in detail in the generic dcsct·iption.
'rhe 1·adiating- plates forming the fringe-like p eripheral stt·ucture pass under the masses of: lateral chaml.Jet·s whidt form the umhonal areas of the test (text figure 2). On the pel'iphc~nt.l !'lange the radiating plates appear to be eros~;cd by nnmcrom; close-set concentric or spiral l>E'JJia l'onning: ti ny t·reta.ngu ht• chambers. During the preparation of horizontal t hin sections i.t may he ohset:ved. that; the radial plat<>s are slowly gr01m.d awa.y exposing t he unclivicled spiral tube o'i' t h<' eq uatot·i al layet: ( .016 mm. in din meter), the radial plates being eo.ntig1.1011s to it on hoth sides. 'l'here'l'ore what appNlt' to he srnall rectan~ular chambrrs 11rc the meshes of a superficial network fot·metl by the Hpira l Sf'pta and the rad ial p la1cs.
'l'a11grutial lnoi?.ontal sections sllow a nctwol'lc of larg'(', il'regnlar lateral chambers, .065 mm. in maximum cl iametct· in average-sized specimens, with scattered pillars which thicken conspicuously lH'<ll' the Cf'nt<>r of the Lest .
• Juvcnarium of megalospheric form as described in the gen<>t·ic cliscussio11. rrlte test is slightly inequilat<>nd and it app<>ars that Lhc embry01uc apparatus is a very low trochoid spiral with t.he apex on the tumid siclP. In the cotyp<' thP two c<>ntral chambers are approximately equal in diameter ( .049 n1m.); the second chamber is cut obliquely giving the appearance of a greate•· diameter (text £ig1.1re 2). 'l'he wall surrounding t,he two central chambers is .008 mm. in thickness.
In vertical section the equatprial layer is well cl<>fined, in an av<'J·ag-e-si:ted specimen measuring .016 nnn. in height near the center of the test and .13 mm. at the pcriplH~t·y. Tho lateral chambers arc low and broad and approximately 8 in a ti<'l' n<>ar the cent<>l' of the test. Pilhtt·s well cl<'veolpr<l, :inct:<'asing J'a]1idly in thickness J1ear the surface at the center. ·
D1>nwnsions: Average-sized specimens measure 2.5 rum. in diumcter with a thickness of 1 mm. Larg<l (microsphcl'id) l>pecimel1S measure 4 mm. in diameter.
J,ocali'ty and qeologic h01·izon: The cotypt's wore collected approximately 1 kilometer west of Central San J\ ntonio on the railroad to Central H ershey, Havana Pt·ovince ( PHlmct· Sta. ] 214). The n ew species is very abundant, ancl widely distributed in the Upper Cretaceous where it accompanies Orbitoides
242
Qctuhre 25, 198<1) 1Yle-mo1·ias de la Soc·iedad Poey
pal?neri Gravell, 0. b1·owni (Ellis), O.tlel'Cttli?la be1·muclezi, abundant small foraminifcnt and charactcristie rudistids and
eehinoids.
?Camerina dickersoni n. sp.
(Pt,A'l'E 14 1 I•'J OUltKR 11 2, 4, 6 and 8)
Test very finely prrf01·atc, small for the ~en~s (s~ldom exceeding 2 mm. in maximum diameter), round .m s1de v1ew, compressed; wmarly co111 pl.e tel,y involu tc a ~1cl b1laterally s~rmmetl'ical though large specimens 1tt'P very sltglttly more tunnd ventrally with ~ligl1tly evol ntc 'l:inal. chambers.
Both microsphcric a rt d ruega lo:-;plt <' r·ie forms have been founU. at the type locality.
:l!~tG. •1.-?Camt: r' iiiCI diel•rrsolli n. sp. B;trly chambcnj of m<>gnlosph<'riC specimen. x50.
li'JG .. i.-?Cn.IIH'ri/111 dil'kl·rso11i n. sp. Early cham· !Jet·~ of micro~phcric specimen. :x50.
'l'ht> microsplteric fot·ut is <•ltaractni;,cd by a large umbonal knob ·both dorsally and v<>nttal ly. 'l'lte sntut'es are gent~y elevated :mct ver\' neal'ly radial ctrrvill~ abruptly at the per1pher.v to unite with 'the r>r;•cclling- ~" u ttlt'P. Pt>riphrry narrow, fo!·merl by a fringe o[ 11 rtnwrous ::~mall radial platrs. Chamb(>rs eqlllt:m~, embrHeing w ecPcl itr{! <:lt!ltlllH· r·s to thr 11mbo save in large speclmcns in which the lm;t cltam l>e1's do not quite r each the umbo dorsally ot· ventrally. A pl' t·tm·C' a small inverted v at ~he ~ase of thr septa l face am1 vrr·y sli ghtly ventral to its ~echan hno. ln horizontal section t.hr micror,phrric form compnse~ approximatel v 4 whot·ls with Hl ehamhrt·r; .in the final volntion . 'l'he initial· microsph{~ric chamber measnres .016 mm. in di.amcte~·· Internal structnre similar to thnt described of the megalospher•c fonn.
'l'he megalosphrric form clirt'crs from the microspheric form in that it usually attaius a slightly greaLcr si7.e and large speci-
21:\
Universidad de La Habwna ( Vol. 8, :-/9 4
mens are more distinctly inequilateral. The umbonal knobs ar.:l usually absent but if present are small. 'l'he tc~t .is s lightly concave ventrally when the nmbonal knobs arc absent. 'l'hc mcgnlosphcric test compr ises 2Yz whorls with approx.imalt>ly 1() chambers in the .l:iual whorl. The initial chamber of the mega lospheric form measures .023 mm. in diameter. Brok~n specimens revcalil1g the penultimate whorl sltow a spiral cana l on the dorsal siclt> only, just below the marj;,'in of the test.. The spira l canal gives off hrauches to the septa. A muTow canal crosses each :,;c11tu ut o·IJJiquely, dorsal to the apet·ture and debouches at the periphery. At the periphery the canal cn1·ves abruptly to meet t he canal of the pl'eceding scptn ro. 'l'hc canal ou tlw periphery i.<; hid1lE'n by a fringe of numero us f ine radia l plato::;, thus forming the most conspicuous cha1.·acter of the species.
JJimens·ions : Mictosp hcric cotype l mm . in diamet('l' with a tbicl<ne::;s of .4 mm, Megalospheric cotypc 1 mm. in diameter, thickness .3 mm.
Local·ity wml gcolog·ic h01·izon: The cotypcs were collected 1 kilomel.e1· west o£ Baiios de Ciego ::VIontero, Santa Clara Province, in the yellow mal'ls overlying the type locaLity of 01·bitoicles browni (Ellis) (Palmer Sta . ll20B). The new species is abundant at the type locality and is associated with f~'a:ogym, Ilamulus, ost1·acoda and occasional small foraminif('ra typical of the Upper Cretaceous.
'J'he generic reference is questioned. 'l'he species is small for 1:]t(' genus; tht> test shows a tendency to become sligl1tly evol nte in large specimens though scarcely in n degree to warrant a rderenr1e to 0 pM·wlina; the septa are not completely double but have a small t1·ansverse canal; the character of the periphery is constant m1cl. distinctive a11d does not appear to have bccu described in connection with t he genus Cwlte'l'ina.
The new species i$ distiuguished from ?G. cnbensis by the posscssiou o.E a single large kuot ·both do1·sa'lly and vHut rally in tho mic1·ospherie form and a siuglc small kuob o1.· Hone a I, a 11 in the m('galospheric form, instead of t he :;mall central knob surrounclecl by a spiral of smaller knobs. 'l' hc horizontal scct.iOllS of Lhe microsphcric forms shows appl'oximatcly 19 chambPI'S in Ll1e final whm·l of ?C. cl.ickersoni and about 28 in '10. oubensis.
Octubre 25, 1934) Memorias de Za Sociecla.d Poey
A. smallnnmmulite, S. mengaucli Astre (ll has been recorded from the (jpper Cretaceous of France. The forms are entirely distinct: N. mengaudi is !cuticular, wit.hout umbonal knobs and no mention is made of the peripheral ft·inge, a stl'Llcturc so char
acteristic of ?C. cliclte1·soni. The new species is named in honor of Dr. R.. .E. Dickerson,
Chief Geologist of the Atlantic Hcfining Company of Cuba.
?Cameri:na cubensis n . sp.
(PLA'I'I~ 14, J~IG Uilll:S :1, G and 7)
'l'e::;t ve1·y fiuely ped'onttc; Nana ll .in size; cit·cular ·i.n siue view, bilaterally symmctric!J l becoming; s li~h tly more t u1mcl ventrally in large sp('cimen~:>. U mboual regLOn both dorsally and ventrallv oecnpicu by a small, proi nl'n t; knob su tTOlllldecl by an irrcgula~· spinil of smaller knobs at the i~ncr end~ of the suture:;. Sutures gently <'levHte<l and nc•al' ly nttl1al, hendu.tg abruptly at the periphery to join the p1·ccediug suture. Penphery ch~ract erizcd b:r a vea·y distinctiv<' marg-imll fl'in~e composed of numerous v~ry sma'u radin.l plates as in ?('. diclce~·scnti. Aperture not discernible, probabl~· at base of septum. :\!Jcrosp~crlc for~ onlY has he('n id('ntifiNl. Test compa·ising apJl roxunately 3 whorls with 21 to 24 chambers iu lhe final volnt.ion. Chambers eqnitant, embr<t<:ing tlw JH'PCt>ding chambers lo th? nmbo except in large spccinwns in which last chambers are shgl~tly ~volute.
Dimensions : 'l'hc holot.vpc measure 1.2 mm. m d1amcter with a thickn('S!l of .4 mm. iu the uml>onal r(•gion.
Locality ancl geologic ho1·izon: 'l'he new species is moderatt>ly common in tlae Upp<;l' ()rctaccons !) kilometers west of F;anta Clara and approximately l3 ki lometers sOtlth of the Carretel·a ·Central, Santa Clara P rovince \Vhcrc it is associate<I with O?'ln:to(;ycz.inu, a ntl SlllH II ro l'alll in'i'l'rra.
?0. CtGbensi.~ i f:! clis tinguislaPd from ?C. clicke·1·son·i hy the possession of an incguhn spia·al ol' suHtll knob!,; sut'l'oundi11g a small central lwob on the umho instead of a single large u m bonal knob or no knob at al l, as dcse1·ibcd :Eor the latter species, and
(l) Ll.9trc, G. ~tuclo pal6ontologiquo des Nummulites du Cretace :;np6rit>m· cle Cc~an-Lanmlons (Gel'S), Soc. (loot. .U'ranco, Bul. (4) t . 23, 1923, Nos. 7-8, p. 360, pl. 12.
245
Unive?'$idad de la Habama [Vol. 8, N9 <l
by having more chambers in the final whorl of micr·ospher ic specimt>ns.
Family 0 1·bitoididae
Small stellate and rayed 01•bitoids are almost always present in col lections from the shales and fine g r·avel::; ot the Cubau Upper Cr etaceous. Specimens are seldom abun da nt and are wma lly so fl-actuJ·ed that it has been difficult to secure sa tisfactO!'.)' thin sections. H owever, these fo 1·ms a1·c so characteristic of the deposit and so easily distinguished by external ebaracters that they are deemed worthy of specific names a lthou gh the generic refer ences are in sevel'al cases doubtful.
?Asterorbis aguayoi 11. sp.
(PuA'!'E 13, 'i<'JOIJRJ> 7)
'r est sma 11, a vemge-!>ized SJH>cimens mrasuring 4.5 rom. in dia ru etN·; l£•nti cular; peripher.\" sharp and projected into 5 short, sharp points. T he peripheral poi11ts m;ry or may not ext<'llcl 011 to the el ise as rays ; when they do the rays arc broader and shorter than those of A . 1·ooki V . and C.
'F'w. li.-?A.~tero!·7Ji.~ a.Q~WJJOi 11. sp. Burly chanthe 1·~ o f' 111ega lo· spheric rotype. x50.
l•'1n. 7.-?Aslm·o?·bis a,quaJ; oi. u. sp. Chan1bors o£ oq uatorin lln.yor. x25. ]i'I(J. B.-?A11tororH~ (lg1tayoi n. sp. VorLicul section o£ cotype. x8.
Hotlzon tal Hections show very small equatorial chambers with cnrved outer wal ls and pointed or tt·n rHm tcd inner· nncls. rl'he rayo<l structure o.C the test is cleady seen in the oquatm·ial layer. Sati!-l factol'.)' sections of the initial chambers have not het'n obtained . '!'here is a large snbspherical ehambe1· which partially embraces a smal l subspherical chamber and these two a r·c surr·oundecl by sevPral chambers with indefinite lHTangcment suggesting a spira l. The maximum diametet· of the largest initial chamber in tl1c cotype is .23 mm. (text figure 6).
246
Octubre 25, 19341 M emorias de la Socieclad. Poey
· Tn ver-tical section the Pquator· ial layer has a thickness of .016 mm. ncar the cent.cr and thickens very slightly toward the periphery ( .0:.3 mnt. ) .. The ~ateral chm?bcrs are ver.r low a~d arran""ecl iu JHUTOW t.Iet·s wtth appr·oxnnately 20 chambers ill cent r:'l t iers. Pillars arc absent. 'l'he thickness of the cotype fignred in vertical seetion is J .1 m1~1. thr·ough the center.
Dimensions: 'l'hP coty]1<.' sho\\'rng the external characters measures 4.3 mnt. in diameter with a thickness of 1.4 mm.
Locality and geolor;io horizon: 'l'h<' cotypc showing the external characters ·was coll cctccl 1 kiloJUetPr south,vest of Central J csns Mat·ia, Mata nzas Pr·ovin cc (Palmer Sta. 911). Cotypes jl] 1u;tr<lt.ing t.he i·nf;et'.I!Jrl ehanwter·s wc1·c obtained at t he corner of Rosa Enrique and .Arango s1a·eets, L rryann, Havana (Palmer Sta. 847 ) . A. aguGtyoi is locally abuuclant in the Upper Cretaceous where it is associatecl with A . 1·ooki V. and C.
The new species is distingnished from A . 1·ooki by its thicker, distin ctly stelhrte and not typically rayed test. Pillars are very ::;mall or ahseut and when the rays a re developed on the test they are shorter and broader than in Jl. 1'00ki.
'rho new species is named in honor of. Dr. Guillermo Aguayo, Professor o£ Zoology in the H avana University, whose generous support and encouragement is ever available for the advancement of science in Cnha.
?Asterorbis macei n. sp.
(PT,A'l'E 13, l•'t(HJI:.E S)
T est small, seldom c~ceccling 6 mm. in diameter; discoi?al, without umbo; periphery extcn<l<'d into 6 to 8 rounded pomts which may project h{'.}·ond t.he main disc a distance almost equal to the diameter or the elise. 'l' ltc per ipheral projections clo not extend on to the d isc1 as ribl-1. Sur·race ~;mooth e~cept in weathet·ed speeimens in which the r eticul ation o£ latera l. chambers is exposed.
'l'he hor izontal :-;ection is very d istin ctive because the lateral chambers completely snnound tho p<'riphcral projections. The horhwntal section, therefore, shows a border of lateral chambers. 'I'hc equatorial cham hers of the main disc are very small and a]1pear almost crescentic in section; the inner ends o£ the equatorial chambers appear to be t runcated. A ray of large equatot·ial chambers extends into each point; at its extremity
247
Unive1·sidad de la ll abana Octuhrc :!li, l!Jn.Jt
each nty is composed of a single row of chambers itwt·casin"' to ~\~o. or morl.' r ows near the disc. Satisfactory ;rctions ot the nnt111l chambers have not b<>en obtained. 'l'he e mbryoni c uppa J·atus app.ears to b~ a low spiral composed of scve1·al ~ha1!1be1·s. 03 In v~rtica ~ RCCtlOn the cquatol'ial lar<'r mC:'aStH·cs about
· mm . 1n tlnckn<>ss near the center of t he trst iuct·ensina to .1 mm. nem· the prrinhcr" of . · t' 1 ' " _ · ·' a p1 O,Jer 1011. m l.rnll c·hamber s ar~ lo.'v a~1cl ana~9cd in t iers of approximat<•l.)• 15 ncnr t ho ccnte.' ot th~ test. I Jl lar s are absent 011 the disc. 'rhc rx1 I'C'IHitit'f; of t h.c lateral challlbers of the disc do not q11itc into solid pi llar~ t;~t .. Jntc J·I oc:~~ . loo~'>rly, pe1:111itt.iug . com~1 uuicatiou lwtwPt'n acl.ia· c: .~t e!1a1~1b~ 1 s. Fhe vertical. sectwn ot a r ay lH oval1o ciren la1· \\JUt tlltl!lltmg j)J Jim·s and tH'l'S of 1<1t(>1'Hl cha niJJCrs.
Jo'w. 9.-?Ast.rroriJi.< 111acri n. sp. Dingranunatic V<'rtical ~cctiou of spl·c~mcn f rom Palmer Sta. 12H. Sho"·iug tier'ij of over-
' lappmg. latern l chambers without true pillars. Section JHISSl':> ~nt:o late~·al ch:~mbrrs ncar margin. x 10. Drtail s~wws wterl o~long of latorrtl fha.mbcrs in coni iguous herR, gr·c1rtly enlarger! .
I 0.-? A8tC'rorbi.~ macci n. sp. Diagr anunntic horiwJrl.al ~cct.i o u baH<'d 011 specimens from l'almN SLu. 1 ~1 ,f. Showinghord e~· of latcrnl c harubcrs, c , ·~sccntic cquat.ol'inl cl rnml~cn; Jl l r~ys a 11d very small cqun to l'i u l 1·hambcrs on disc. 1 •llliHyomc 11 Jlpo.ratus not p rusur vod. x l 0.
• Th·n·t.c~si~·~s : 'l'l~e holotypc i~ an a ~Pntgc-size<l s pecimen muts nrtu..., 4.o mm . .tn d ram<!tcl' w1th a t ll 1ckiH'Hs of 1 1111n.
. L ocal·ity ancl geologic hm .. izon : 'l'he holoLyp t' was coll ot:.icd 111 the U p pet Ctctaccous 1 kilometer WPSL of C:clltntl San Anton io 011 t he r ailroad to Cen tral Ilet·slwy, ll avana P1·ovincc (Palm er .Bt~t. l~l-J.) associated with Orbitoicles bi'O!CIIi ( Ellis ), Li.vlerorb'ts I'OOh al1C1 abundant small fol'amini£era .
Octul>rc :!5, 1981] ill emorias de let SocieclacL Poey
The n r w species is n•ndi l.v d istinguished from all other stellate and rayed orhitoids of the Upper Cretaceous by i ts external form: i t is a disc, not umbonate and without j)rominent pilla1·s with 7 or 8 long, rounded p1·ojections on the periphery.
The uew species is namC:'d in honor of Mr. ·william A. 1Iace,
Administrador of Cc>nt rat Ran Anton io, whose many cour tesies have ~reatl.r fac ili tat.rcl the eoll<'ction of palrontological mater ial
in the> Ma.d1·uga. a 1·ca.
?Asterorbis wbensis n. sp.
(PI.A'I'If. 1:1, :PwiJimS 0, 0 nntl JO)
( J.'I.A'l'E i tl 1
.1!'101 lll': ll )
'l'esl. :mudl, diamctt·t· ol' av<'ntgr-r;izPll sp·ccimem; 4 mm.; tnmicl, occasionally aln10st sph<'l'ieal, with a narrow peripheral flange on which 5 shol't points a 1·r d evt'lopNl . Sul'faee almost :;mootll, with sma ll microscopic papil lar best d eveloped iu the ceu trn I art> a.
~peeim<'ns arc badly traetm·<•cl aml satisfactory seeti011s have not heen obtained. In hot·ir.Olltal SN:.tion the rayed structure shows di'.;tinctly in th<' <IITHHgc•mrnt of th<' chambers of the N! uatorial Ja~·er. Equatorial chamix>rs have cunecl onter walls and truncate inHCl' walls. 'rhr nmhryon ic apparatus is ver y indistinct, apparently com posed of sevrral chambers.
'l'he Y<'t·tical sect ion is vet·y d istinctivc. 'l'hc equatorial layer incr<>as<'s vr1·y slightly in hPight from the cC'nf<'t' to 1he p eriphery. Tlw lateral chamb<>rs are low aud arr arrang<•d in g radnall.v wiclcni ng ti0rs, c:c>nt.nJI 1 iPr s c:o11t.a ini ng 30 Ot' more chambers. Pilla r s numerous, ver y nanow, not incl'easing gr eal'l.'T in thickness JH'aJ· t.l1P snrfa ec, appa l'Cll tly formed by the overlapping {'nch; o£ th<' lat('r<d chnmhPI'S.
Dbm.ensions : .A verngc-si:-:ed specimens m easure 4 mm. in diam('t{'t' ·with !l thiel<nN;H of 2 llltn.
Local1:ty onll {J ilolou i<; hm·izon: 'l'h c cotypcs were collected 1 k il omet er Hnrt ll of Santn. Ulal'a Station on the "Norte" railroad, Santa Clara Province (Palmer Sta. J15) . The specimen figurrcl on plate 13, figmc 10, came from 4 lti lometers east of Espenmza, .Sant a C la n 1 Prov incr, in Pielcl south of t he railroad. The new spt'Ci<'H has 11CV<'r been fonnd in abundance. It is associaLed wi th 0 1·b itoi.de8 IH'own'i (:Ellis) and On~phalocycl ~ts "i!Wcl·opo!'I'S and 11 eharactrristic assemblage of Upper Cretaceous
24!)
Unive1·sidad de la 11 abana: [ Vol. 8, N9 ~
small fornminifera. It is readily distinguished from the othe r . stellate a nd rayed orbitoids of tlw UJlper Cretaeeons ·by its very tumid :;;hapc w.ith 5 short, stout peJ:ij)hen.tl points.
llS'I'EROtmrs RooKr Vaughan and Cole
(PLA'I'E 13, ]~!(lURES I J :l 1111(1 5)
Lt. 1·ooki Vnughan und Cole, Proc. Jlint. Acnd. l::lei., vol. 18, 1\9 10, 1932, pp. GJI 6J3, pl. 1.
'l:cst leJlticulllr wit h 5 well devcloj)cd rays or radial ribs cxtendlllg [ro1.n the low nmbona l l<nob to the p eriphery bnt seldom pro.JCct1~g heyond the g'Cneral. peripheral hotdet as points. Near th.e penphery there is a tend ency toward the intercalation of rays which do not t each the umbo. Surface J•chcnlate and papillHtc, the papillae b<!ing well developed on the rays and the umbo.
"I•' rCI . 11.- Astr·I'OT/J·is 1·ooki V. & C. Cfrntnbers of equntol'ial layer. x25. Palmer· Sta. 1214.
'1•'10. 12.- Astc,·orbis ·roolri V. & G. J~nr ly cbamucrs of megalosphe,·ic ~peeim<>n . xu'o. Palmer Stn. 1214.
Xn horizonta l section the equatorial cha mbers have curved outer walls. Ne>ar the center the radial and transverse diameters are l1<?lll'I.Y cq ua 1, the J'orm et· inc1·eas(•s gradually and at the periphery .is nl most t.wicc the transvCJ·se dia.mete·l' (radial .18 mm.; trH tiSV<,r:;;c .1 mm. i:u a s pc•ci men 11.8 mm. in diamef:et·). Radial structnre distil1ct .in section. The embryonic apparatus is KPklom well preserved. l t appears to be a low spi1·a 1 co mpos<•cl of a small sullsphr1·icHl chamber (maximum diameter .lJ 5 111111. ) paetly embraced h,,. a la 1·ge J'eniform chamber (maxim um diameter .246 rum. ) f.lwsc two being surrounded by a modrt·a trly l1ca v.r wa 11. D tn·ing the prcpa ra tion of the section a vC'ry small chamber was obset·v<'d 11hove the reniform chamber at the wall of the spherical cltm11h t>r. 'l'hese early cham-
2:i0
Octubre :!5, J 93·1 J ill emorias de la Sociedad Poey
uers arc !-IHITOundotl by 5 01· more chamber s, the arrangement of which sugg<•Rtfl a spiral. . . .
Tu vet·tical soctio11 the (~quaLOt'lHl h1yer 1s tlam (.016 mm.) near the umbo, i11crcasing only about a third. of. this (.~24 nun.) near the periphery. Pillars are well. developed, especJ<'Il~y near the umbo. lml.<wal clHJllllJer:> low ( .00 mm.) and broad (0.6 mm), approximately 10 in a tier near the center o~ the test. Radtal structure of test clcad y shown in vetti<•al sect aon by the enlarge-ment. o£ t lw rq uHf or ia l la.rrr where it crosses t he rays. . .
Dimensiow;: Average-sized specimens m<'asure 7 mm. m diamete-r wit.h 11 th ickness o1' 1 mm.; the largrst specimrn found measm·es n early 12 mm. in diameter.
LocaUty a.nrl ytwlog•ic~ horU!on: Fragments of this species are common in eol i<'Ctionfl from t he U ppct C1·etac1'ous in Cnba but well prescrvrd spcci 111cns are r are. T'l1c J' ignred specimens wct e collected 1 kilometer west of Cm1t.t·al San Antonio (Maclrnga) on the railroad to Central Hershey, Tiavan n Province (P almet· Sta. 121 4) . 'Phe associated fauna compr ises echinoids, mollusca and abundant 0 1·b'ifoides and small foraminifera.
The Cnha n specimens are believed to he specifically identical with the forms dC'Rcribed h om MisteJ·fc lcl t \Vell W 1, in Rankin Co., Mississip11i, t.hongh the average si:t,e of tl1e Cuban specimens is approximately twice that · of average sized fo1·ms descri bccl. In the Cn ban Rpecimens the rays do not p1·ojeet br>yoncl tl1e periphery in stellate points and there arc bn t 8 to 10 lateral chambers in a tier whereas the typr has app1·oximately 16 chambers. These distinction s scarcely warrar1t a var ietal name.
?Asterorbis havanensis n. sp.
(PLAT~; ] 3, l!,JGUJn: I I)
Test vrJ'Y small, f·ll<' average diam c•tcr approximately 2.5 n~m. ; lenticmhu·, frc•qncntly quite tumid. Periphery sha1·p, proJecting into 4, blunt point:s. Surface of worn specimens r evca.lmg the t·ctien la t inn of the lateral chambers and 4 or 5 small papillae at tbe center.
Specimens nre bad ly fractured and satisfactory sections h ave not been obtained. The horizontal section shows a borclet· of lateral chamhet·s wi t.h n single row of equatorial chambers extending into each ray as in 11. rnacei. No section of t he embryonic appara.tns was obtained.
251
Universidad de la IIabana. [Vol. 8, N1 J
. In verti~al St'ction the equatorial Iay<'t' is seen to he very ~luumeasurmg .016 mm. near the cm1tct· and .0:3:3 mm. al. the per' pht't')'. Latt>ra 1 chambers are smal l and al'e at·t·ang<'d in tiers, ~0 or more chambers composing the ceutral tiers. Pillat·s well cl<'v<'lopNl in the central region, ill creasing ra piclly 111 thickue;.;.> to\\'arcl the stn·face.
f)im ensions : The holotype mNtsurc•s 2.~ Iilii I. in diameter \\' il h a thickness of .9 mm.
Jo'ICI. 1:1.-? L1.s!cro1·!>i.~ hava.1wnsis n. ~p. DinJ.ti'HIIIIIl:t( ic· hol'izonial scct1on based on lmclly fmcturecl spcciluon from .J l<ilo· motc~·s sou1 hcast of Cent•·al l'a •·que Alt o, ::>nn\n C'lum Prov111ce. xl::; . Tuditat~s boi'Clcr of' latct·ul chamiJcrs small ~quatorial ~hnmiJcrs on dis<: HIHl ra.v or hll'g~ t'~lu~tonal chamiJcrs in cac·h point. 'l'his structuro is ~·mnlar to that of .' Ll . macci.
l"Io. l4c.-?-1.slaorbis /I.(Ll'll/l.tnsis n. sp. Ve•·lit·al Ht•ction of specimen from 4 kilometers southeast or Ccnt1·al Parquc Alto, Santa Clara Province. x 10.
i JO('(tlit !J cmd geologic h orizm~ : Th"' holot,qw was collected 1 kilonictcr west of Madrnga in a cut on thr Canct.rm Ccu t t·al, liavana Province (Palm<'T· Sta . 784).
'Phis distinctive species is not common but is widely clistribut<•cl in the Upper Cl.'etaceons. It may ·be disti uguished by its l.nllli d, 4-pointccl, centra lly papill atr, small te:;L.
?Mea.ndropsina. rutteni n. sp.
(PL A'I'E 12, FJGUltF. 2)
. 'l'cst very thin-waJ Jccl and delicate, porcrllancons?; small in lilZ<', S<'lclom e.xeer-'di ng- 2.2 mm in dia.mct:<'r with a thiekness or 1 mm.; oval in side view, bilat<'rally symmctt·ical, completely
2-'52
O ctubre 25, 1934] M.emol'ias de la SociedaiL Poey
involute, compress<-'<1. Pr1·iphery •;arrow and rounded .. Um· bonal region slightly depress<'d. Surface smooth aucl w~thout ornamentation. Sutme lines very ·broadly curved a_nd shg~tly depressed. Twenty to tW('nty-fivc nal'I'OW chamb~rs m the f1nal whorl subdivided by numerous (more than 60 m last formed chambers) delicate part it ions iut o chambcrlets. 'l'he partitions of the chambers arc in 2 seri<'s, a prinun·y st-rles which appears to join t h<-' concav<' face o£ the succeeding septum and a s~condary series extending approximately half way to ~he contiguous st>ptmu. Apertures not discernible. lVLeandenng superficial layers ahsrnt.
l''IG. 15.-!JlrandrO[J.~ina 1'1Litrni n. sp. Diagrammatic horizontal !lt•l'tion showiug heavy chambers walls and complete partitions of chambers. x25.
FIG. 15-A.-Dc\.all of exterior showing partial gccondary partitions of chambcors. 'J'hcsc are superficial and do not nppcnr in sections.
I n horizoltta'i :>ecLion a specimen meastn.ing 2 mm. in diameter and compr~i ing- :1 wlioJ· I ~ has a ~mal l sphel'ical initial cham-ber measuring .06() mm. .
'l'he v(wt ieal 1·wct ion shows the Lest to be comp letcl.y mvolute.
TJoca.Uty a,na geolog',;o h01"izon: ?M. rt1,t-tewi has never been found in abundauce but fragmcnhl arc alrn.oRt invariably present in lar ge collections from t il e Uppel'lnost Cretaceous of Cuba. 'l'he holotype :figured in <'Xtel'lla 1 aspect was obtained ncar .Real {"ampiiia, Santa ClaJ'a Province. The diagrammatic horizontal section is ba.Sed 011 SJlCcim<'ns f1·om 1 kilometer west of Cent ral San Anhmio on the railroad to Central Hershey, Tiavana P rovince (Palmer St:a. 1214). At the latter locality this
25:-l
Unive·rsid<Icl cle la Ilabana
species is associated "~th 0. ( Gal/t}wayi·na) broU'ni (J~llis) aud ch1u·acteristic Upper Urctaceons small fonuninifcr·a, cchinoids rudistid fragments and mollusca.
'l'he taxonomic position of this in teresting for'11111inifera has not been satisfactorily fletenuinecl. 'fhe generic rcfe1·encf' has been <tuestioned because no trace of adult Jllrandl'opsina has been eJJcou ntered in the widrl,r di~t1·ib11ted and v<'l'Y fossi liferous n P.P<'I' CI'Chlceous of Cn ba and IH:'ca \IH(' tlu~ ::;peci mens arc so delicate that per fect specimens nrc s<>ldom found and t hey hav<' not lwen f'otmcl in sufficient abniH.lauxJc to permi !. t hr Pl't'[Jal'ation of a larg-e se1·i.es of secti.ous. However .. t he appH I'<' II t ly J)OI'cellancons test , the incomplete secondary series o.f partitions in the el1ambers, the plan of g 1·owth and the si ~e show <.1. gcnct·a.f ag1·eemcnt wiLh the form f iglll'ecl :mel dc'~cribed by Sch fu mborg·cr as an immatnre M. v·£dali. <1
• 'l'he speci n1eJ1s so identified by the founder oC the genus n'ere obtaiJJPcl in abunda nce l'mm the Santoni<tn oE 'rrago d i Noguera, Spain. Both mc•galospl1eric: and microspheric fm·ms were present and the detailed ehar·aet.PL·s indicated the identity with the adult .lleancl1·opsi·na vidali wh ich attains a diamet"r of 18 mm. The author noted the nbscnce of the meandering supe1·ficial layer·s which at·c so characieriHtic of the adult forms but no doubt agr·epd with Douville <:.~• that these ar·e of secondary importance.
The new species rna~- he distinguished from the immature lf.!. vidah; Sch. by the depressed nmbonalregion and sutut·e lines; the more compt·essecl h'st; the oval instead of circular outlin e in side view; the cham bers a1.·e mon' m1me1·ous, thc1·<' br ing :W to 25 in the last whol'l instead of 17; the chambers arc sn b~ diviu<•<l by more n umerous partitions, appl'o:-dmately 60 instead of 20, and t he primary series appc>rl.l's to join t he contignous scptu111, while in M. viclali none of the pm·t;it:ions ir-; eompi<•Le.
'l'hc specier-; j s; dedicated to Dr. L . .l~u tteu, P1·or!'1:o~Ho1· of Geology nt the 1Jnivc1·s.i t;y o.f Utrecht, H oi laud, who has l'o1· 11IOJ:e
(1) Schlw111Je·r!Jc1', C. J!'onnninif6rcs nou"eaux (Ill C1·6J.:I('6 d 'l•:spngne, Bul. So('. Goo!. Fr. (3), ''ol. 27, I S99, p. 40:1, pl. H, fig. :.!, pl. !l, figs. l1 nnrl J•J. ·
(2) Dmwillc, n . Essni cl'une revioion des Orbitol i tc~. flu!. Soc. Ocol. Fr. (4), vol. 2, J902, p. 301 .
254
Octubrc :}5, 1934 l ill cmol'ias cle ln Socicd(td Poey
I 1? Years bec>H actively interested in problems of Cuban t 1811 - • . h' b h h gt'<llog." and paleontology and to the knowledge of '" lc e as made notable contributions.
EOCENE
I<'amily AMI'lliS'I'I~G I NIDAB
Amphistegina lopeztrigoi n. sp.
( I ' I .A'J'J~ 115, I•' IO UIHJS (I and S)
'l'Pst 1uodc>1·aL<'ly la1·gp; hi conwx, :-;omewhat mOJ'C strongly elnatcd vmtrally than dorsally; periphery sharp, not keeled. ~ixtr('n or· mm·r hn·gc knobs OI'IHIIllC'nt thP center of the test both dorsally and vcntl'!rlly. Ruturl'S obscured by the ornamentation <'XCCJ~t lWIIl' the pe1·i phcry where they are seen to be broadlY cunc>d aucl not. elc>vatrd. Approximately 20 chambers in fin~l whorl; chambers apparently involute dorsally. On the venti'Ul :mdacc of worn sp('cirnens the snpplementnry ch~mbers rna\· he distingni.;lwd. rx( ,'JHling approximately one-third tbe di!it~nce from the vent1·a l umbo. Aperture just ventral to the peripher: with the ehamd,•ristic basal granulations of the genus.
Dimensions: 'l'hc specirs attnius a maximum diameter of :l n11n. \\'ith a thi ~:lowss of 1.2 mnt. 'l'!te cotypes rueasure as fol lows: dorsal figure: diamelc'J' 1.8 rum., th ickues!-l 1 mm. ; ventral figm·<·: diametl''l' 2.6 mm., tlliclmess 2 mm.
Locality ((.ni/, yeologil; ho1'izon : ' l' lle cotypcs were obtained ut the crossing uf H.io Gnana:hanito on the Camaguey City . :Y.Iaraguan, Hi 111il es east of Uamagncy City (Pa lmer Sta. 687). 'l'he hori~Oll i ~:; mocelle, !> l'vbabJy Middle Eocene, in age.
The specie::; .iH naml'cl i11 honor of Sr. Ing. Gonzalo LopczTrigo o£ Carnaguey, whose interest in the study of Cuban fossils it i~S a pleasure to recognize.
255
Uniuersidad de la H abana
Family A.l1PHISTEGINIDAE
Amphistegina cubensis n. sp.
(PLA'l't: );}, FlOUR!<: 2)
[Vol. 8, Nv 4
'l'c~:;t V('ry heavy and largH for the gPnus; dor·:·;ally t'lat to n~o~lcratc l y inflated; ventral ly vety conical. Only one whorl vJsJhle dot:sa lly; su.tur-cs scarcely discernible except in woru ot· small spccuncns bcmg obscured. by tbe heavy nmbonal dcpo!>its; a sma ll :-:JH~c i men (diameter 3.3 mm., altitude 2.5 mm.) has app!·oxirnnicly ;JO chambers in th<~ f inal whorl. DorsaL and vcn tml septa veJ.·y bl'ond ly cur·vcd ; :mpplementat·y vcntra,l chum bcrs not discenri lJ) e. l?m· i phery sharply rounded. Apertlll'e iucl.istiuct; short 1·iclgcs jnst ventl'a l. to t he periplrel'y are probab ly apel.'tll t'al gr:~ntul.Htion~. Tt is of interest to note that while the mu;jority ol the speCIIll<'ns coil in counter-clockwise manner·, num('I'Ous specinrcns coiling clockwise were noted.
Fw. 16.-.diiLJlhi.~tcrJina cubtnsi,q n. sp. IT orizonta 1 section of cotype. x 12. Slipp.lc<l por·tiou. indicates heavy shell wall aud septa. At right mnt'l,"lll tho soct 1on pnssed tbrongh the apertul'e.
l-'10. 17.- A IIIJI/ti.~l''!/i1!c~ cu.bf'll·si>; u. sp. Specimen slightly bovclled pm·ollol to t ire vcnt.l'al surface to show broadly cmvocl septa. x15.
'l'hc hori r.ontal section shows the very heavy shell wall, broadly CUl'VCd sc•pta and ahse1we oi' int;nl.septal canals.
'L'he vert:ieal se<ltion shows G whorls, wl1ich are · involute dorsally; t he vc1·y heavy shell wall and t he large umhonal bos~;c.'l or shell matc r·ial, the lm·ger 'hoss being ventral.
D'ime11sions: T Jris vel'y la1·ge, heavy she llecl A.rn phisl eginr;, ma.v ntt.ain a <liarnPtcr o£ 5 mm. with an altitude of 4 mm. 'l'hc co type figur~cl in vcrtica I section measUl'cs 4.2 mm. in diar11etet· ancl :u mm. in a lt itude.
Locality ancl geologif; hMizOt~ : A. cuben.~·is is eommou in t.he Eocene of Loma Calisto, Nuevitas, Camaguey Province, where
256
Octubrc ~5, 193•1] Mernorias de la Socieclad Poey
it is associated with Dictyoconus, DiscocycUna, Asterocyclina and Lepiclocyclina.
Various references to triangular scctious of A.mphistegina sp. have been noted in the literature of West Indian pal~ontology but it appears that none of ~hc~r appl~r to ~h~ sp~c1es u~cler consideration. The new spCClCS 1s readily d1stmg1ushed by its size and very characteristic vertical section.
J<'amily Vrdvu./tinicla,e
·GUN'.rmtrA FLORIDANA Cushman and. Ponton
(1-'LA'l'E 15, ]i' IOUIIJ;S 5, 7 uncl 9)
(1-'LATT-: Hi, .h'IGUJCNS 1, 2, 4, 5 and 8)
Gut~lel'ia florirletlllb Cushman a11tl Poutou, ()ontl'i. Uush. Lnh. Jl'onuu. l"<eb, vol. 9, pt. 2, l!l33, p. il(), pl. 3, rigs. 1·3.
'l'his unique species has bcc11 found at :-:cvet·al widely se]J!u·atecllocalitics in Cuba. Most Cuban spccimcus arc bnclly worn and do not show the char·actet·istic ornamentation of the type. IIowevet·, a few small specimens do show· concentric semi-circles of papillae which merge into elevated suture lines in the apical area and the specimens arc in such close agt'<'ement with the description of the type that no important distinction can be found.
Cuban specimens are typically reniform in shape. Occasional large ( ?microsphcric) specimen~> have th<' prongs greaLly elongated ann so rccnrved toward the apex that 1JuL a. small sector iR lacking to pr oduce the discoidal form. A ·few rare examples have been found iu which the JH"ongH have united leaving only a small r idge marking the juuctlon. A few specimens have developed a flexure on one la teral face resu lting iu a three
sided test.
Dillnensions: Average maxi rnnm <liamctcl' of 2~ spec~ mens is 6.1 rum.; aver~ge thickness 1.8 mm. Llug.cst spe01mcn found measures 8.8 mm. in diameter with a thickness of 2.2 mm.
8t1'uctt~re : 'l'he tt>st is composed ot concentL·ic layt>rs of chambers (o1· canals) formed by branching rods and unduJating plates. Outer wall imperforate and vei·y finely ;n·enaceous.
257
Universiclad cle la Hibcvna [Vol. 8, Nv ·I
Unlike Dil'l!}oronus, this arenaceous str uct1u·e appears to be limited to the snrl'ace deposit. 'l'he arenaceous epi lhf'ca is seldom preservNl ove1· much of the test but can be seen in the meshes of f he J·etienlatC' layer. 'I' he broad lateral sudaee is evenly dividf'd b~· conc<'ntJ·ic suture lines (spacf'd .2 to .3 mm. a part ncar the j)f'l'ipht>I'Y in average siled sp~cim('lls) . Between t.hc sutures the test is reticnlat<'ly divided into polygonal chambel"lets (near the periph<'J".)' measur ing .1 mm. in radial HUcl .05 mm. in trans~ V<'l"!>C dianl<' te1') , t.hm·e being usually 2, occasionally 3, 1·ows of altct'natin~ ehambel"lets between cout.igtwus septa.
Whc11 the reticulate layr1: at t.h<· stu·face is wo1·n aw11y thr a i'Nl ·betwe<'n the septa is se<m to be divided into chambcts by an undulHting· platP par a llel to the later<tl s urface of the teNt. 'J'he dep 1·essions in t.h.is nudnl.ating p late ar e p icl'(Jec.l by ova l porc•s. 'l'hc e llalll ben; thus fornl(!d a1·-e alten 1at.iu g in contignow; I'OWS.
111 vc•rtica l :-.rction (cnt iu the line from a.r.wx to a.por tnrrs) the scptn I'OI'llling t !Jr concentJ·ic sutrll·e!'l fll'<' seen to extend inwm·cl and curve towm·d tl1e apex. Between the septa a r·f" 1 or 2 !>Cl'ic•s ol' Hhmt, He•condary septa united with the septa by thin pal'( it. ions at right angles to them, t h ns forming- t hP small ef'l Is of thr 1·eti culatc la v<' l'. Tn the center of the test the vertical section Hhows a hr~v.r plate of shell substance which parallels the h1·oacl lateral sm·fac<' of the trst and at intervals is e~·osse<l b.v pon•s o1· canals . .At intervals the ma in plate gives otJ: b1·nnclt rods on hoth sides, which cut·ve- outward and toward the apex to join the imte1· en<ls of' thr septa, leaving pore HJHICf'S hf't Wf'en thr main platp and the septa . The b1·aneh rods flatten at the out.r1· <'llcls where they join the inner ends of the septa and unite contimlons septa, thus forming the nndnlat.iJJg plate seen just below 11Je- J'(•f.icmlnte layr1· in ]flteral section. Thrre ar<' t.hus form<'cl 3 sct·i<'s of ehambers in each leycr : 1 on c>.ithf'J' s ide of the mHi n piH t:r, th{' ini(>rmedia te elunn·bers hetwcn the main pln.te and tl10 r t't icnl at.r layrl' <111 cl thf\ clHnnbers of the reticu l atf' 1 a.)'('l'.
Aport.nrcs in 2 ·pandlel r ows on the p l;\riplJe'J•y, being the pores b01·clc'1'ing- tho main p 'late.
Both vet'ti<lal and horizontal (cut p arallel to the broad lat. c• l'a l li iii"Pnec of t he test) s.how the cen tra l. plate Lo be douLl.t-, t:h crc• bring· us ua lly n fine line of junction between the l ayc~·s . In oecH:-;iona I Hretions t he two layers have not cornpletnly coa~ 'losced ancl a tube rrmH i m;. Likewise, in occasiona 1 speei mrns the hl.tCI'Hl btH.ncll l'Ods arc seen to be l1ollow.
Challl hcl'H of the ju venarinm or embryonic apparatus ar~ 3 in numb<'r. In an ave1·age-sizccl specimen the lat·ge cl1amb<'r on one ~ide meHSII1'C'S .48 mm. i11 maximum diameter; on the ot.he1· side the upper smaller chambe1· .15 mm. and the laJ·get- cham-
258
Octubre ~5, 1934] M&morias de la Socieda.d Poey
nail chamber is slight ly to one side so that ber .25 mm. ~he. s~ .c l<'ntly show but two chambf'I'S. For a horizon~al sech?n:tr~t£~ the. apex or to one side of it ther~ are short ~·!Jstan~e .~ ? al'l'all<Yed c•hamhc'J'S which may be. part of tbhe some lrregll at ~ 1 ... ll e in clic'ltion of an <>arly sptral stag!' e. ·ium or ma:r Je 1 , , h Jnvcnar . . £ the adu lt manner of. growt . fm·e the assumptiOn o l 1
Micros~heric for m has not be<>n o Jscrvec .
!l 'l C' and P. has .1 l . 7 m·izon · 0 ·01'U .ana, · Locality anu, yeo .ogw t · . · . . · C b· '!'his is the nd abnndantly at but oue locah ty lll u .l.. ' . . .
been fou . . . cho Penon, 7 kilometers south of Hato asphalt quauy on Ra~ , , . pcr.2) At this l.ocal-N o Matanzas Provm cc (Palmer St.a. u. ·. . l ,;,·
ucv ' . . b l· I Pol' am rnl'fera me num.g 'ty it is associated Wlth a nm. an ' ·. . . . . bl M ' ddlc I . Tl 1 OI'I"On lS proba Y r 1 Dictyoconns and J>·isool:'!JclMia.. te I .• • .
Eocene.
OLIGOCENE
Family Ca-me1·iniclae
OperculineUa cojimarensis n. sp.
(PLATE Hi, FIOURF.S 1, 3 nn<l 4)
'I I I h•. becominO' slio-htly Test lal·O'e earlr whorls clof!c-cOJ cc , a 1 l t "' tlleo tlJn-"' ' . . . . f 1 hC' lt•st Je ween evolntc so t hat therf' 1s a thmnlllg. 0 eel ;·ounded periphery_. bonal portion and the slightly t;luckcllll ' "Cl and sharply
]. htl lcv·ttf'cl hl'O'H Y curv,. < , • Rntm·f's vrry s 1g Y e ' · ' < • 1. , • iblc very prob-
rlcxcrl at the periphery. }\ pertUrC not t ISCCrn ' .
ablv at the base o£ the sepLnm. · ,. .. 1 s heric ~pec-.'l'ht> horizon tnl section of an avc~ageh~1 ~~cli~~~~s~:,. rcgt~larly
imcn ( 5 mm. in diameter) shows '1 :v .1 · 1 ....
1' ~h~·l Owin '"
but. rapidly in wid th w!th !H,{'<\.t.;t1~~1~ 11;~~; i 7.~ :~tal \ecti~n is n?t to the flexnre of tbe fmal. "' 101
• c 1·1" •
11."
001'SJ1iCLlOUS m
· 0 . lrltt'""Cntal ca.n t. '' ' '~ J,. · rognla.r as 111 am·te?'MUJ,, • ,.,., ' l'
section. . . . . 1 . l t .10t symm etrical. In vertical s<>ction thP t.m;t 18 lcntrcn ~·1 ) ~I '=J_
1 p~s.it. maro·inal 'rhe wall is very thick with a hc,~wy tun Olll1a c.e . . t .the ba~e ot
. I cl •lo pcd . a srna pm c ,, . , ' , corrl not consp1cuous Y cv< ' ·I tl )~Osi tion o£ the spiral the marO']nal cot·d appeal'S to mal c , IC I n nt the ·base ranfll. Aperture indistinct, appal'cntly a ow s 1 .
of the chamber. . h . l'orms hwe been found. Both meo·alosphrric lll1d ltiiCt·osp <'J' IC t tl ' forms on ex
It docs not ~ppcar to be possible to separ!l c wse
2!39
Uni·uersidad de la Jlabana [Vol. 8, Nv I
tcrnal ch~ractcrs, . though exceptionally large specimens arc usu~lly llll ~J·ospi·H'J' JC. The mcgalospheric embryonic appanttus 01· Juvenat·mm •s. composed of 2 chambers: a large spherical chnmbe1· (measnrmg .12 mm . in diameter in a spccinH'n of 5.4 nu~. diameter) followed b-y a large semicircula t· chamber (text f1gurc 18) .
l•'w. 18.-01JC?'C1.1.li noll(l. coj-ilma r eiMi.s n. sp. JJ:a rly chambers of mog-nloapltm·ic form. x50. ·
l•'w. '19.-CcvmPritHI rhmvne-ri n. sp. Early chamlHJt'S of mc~r· alospheric form. x23. "'
. Dirncnsio~1.s :. 0. (;oji'lll.are?ts·is occasion ally attains 12 mm. i~ ch_amctcr .. Specnncus of average size a rc 5 mm. in diameter· WJlh a tl11ckncss of 1.5 mm.
f,oraU!y and geologic hm·izon: 0. cojimm·Mt.~ts IS conuuon at the type loc·ality of the Upper Oligocene Co,jimar Fo1·mation in the go1·gc of Rio Cojimar, 6 kil.ometcrs east of H avana llav~ avana Province (Palmer Sta. 405) . '
A number of species of Open;ulinella and Nunw111lilc.s which appear to bcloug to that genus have been described from the West Indian, CentJ·nl Amet·ican and Gnlf States reg-ions. Unfortunntcly scm·cely any of thes<' species have been ndcquatt' I,, figu~·cd, especial ly in section, and comparisons arc diHlcu lt. 'l'h.c new speciPs shows a decided r esemblance to 0. dia Cole anrl P on ton w deflcrihccl from the Oligocene Marianna I im e:;toJJ e of. Fl.orida a.n<l may prove to be a variety of that species. 'l'he Cuban species is d istingui.shcd by the £act that the sharp flexure o£ the s utm·c is at t he periphery, not nem: the center of the ~vhol'l a~ in dicated i n the figure o£ 0. clia, and it has appt oxmta!.<'ly 10 more chambers per whorl than 0. cl!ia.
. (l) Colr, 11'. S. nntl J>01ttou, r:. M. 'l'he Fornminifcm of the Mnl'imutll. ltnwstone of P lorida. 'F'lorida Stnte Geol Surv Bul I) 1930 ) ~~, 1 (l . ~ . . ., .. } . ' 1 · f) , p. ,, f ig. 7; p l. t, f igs. ll-13.
.~:r.o
Octubre :!5, 193·1] Memorias clc la Socicda.cl Poey
Camerina chawneri n. sp.
(PLATE 1\l, ~'JOI'Rt:S :1, 6 :tlld 7)
TPst compressed, lcnt:iculn r to discoidal; completely involute; attaining large size ( diamctc•r 2l.o mm. with a thickness of 1.9 mm.) in the micro~pl1eric fOJ'IIl. Lal'f:.\'t' s pecimens arc s lightly thickened at the umbos ~1 nd puriphpt·y, thinni np; somewhat in the intermediate arl'a. Periplwry in VPI'Y huge specimens nn~ dulat.ing. Surface smooth. ApeJ' I. IlJ'e not cliH<.:Crnible.
Both megalospheric aucl. nJi et'OHJ1lterie forms have bcc:n fo und. The microspheric form 1:1 ttn iHs hH·gc si~:c ; i:; comp osed of 6
rnpicll.r expanding wh orls with clos(•-set, very numerous septa (approximately 70 in Lhe final whorl o r tl1 e cotypc) ; septa broacliy curved and in the large specimens ·becoming irregular. acljn Pl'n L septa amn;t.om.os i ug at i 11 t l" l' vals. T n l.t·nsc11ial canals distinct in section.
The megalospheric fm·111 avcJ·agittg' :1 Jllm. in diameter, composed of 5 or morP whorls which increase in width more regulal'ly than do thosP of the micl·osplH•J·ic fol'ln; approximately 43 chambers in the final whorl. Bc•pta broadly curved; intraseptal cannls distinct. Bmhryonic apJHll'Htns of the cotyJlP is composed of a large spherical chamlle•· (diamrtcr .2 111111.) and a semicircular chamber. the two smTotmclrd by a relatively heavy wnll ( trxt figure 19).
'l'he most. characteristic strncim·e of this species is that beginning with the third whod in the microsphcric form and the fouJ•th whod in the- m('galosplu~r ic J'orm th('r r is a mottling of the lateral surface. Pl. 16, Fig. 6. T his is ]11ll'ticularly marked in the very large specimens aud is believed to be clue to the mean clcrings of the septa. in tl H~ a.l a1· lli'Ol ongat io11 ~.
Vf!trtlcal section~; show t,l1e tl:'st. to h<> thin wall.ed, with eqnitant chambers embmeing prccrding whor·ls to the nmbos ancl~;rparatecl in t he umhonal a reas by irregul a r chambers. The marg-inal eorcl is p reseut; hut not eom;pi euons. P m a l'S arc absent.
Thct·e is little danger o f. co11fus i11 g- Ll1is new SJWcies with any
previously described Amer iean canH't'inicls, especially if the spec~
imens are large enough to show the t·eLicnlate pattern of the
septa in the alar prolongations. Small specimens may be dis-
2<11
Uniucrsidad cle la Jfabana (Vol. 8, N9 •I
tinguishcd ft·om O,perculinella. co.iima1·ensis by the mot·c nearly sym metrica l, thinner test and more numerous chambers.
J,ocaJity and geologic horizo·n : The type locaLity is 2 kilomotet·!; south from kilometel' post 5.5 on the Cardenas-Vara<.ler o road (Matanzas Province), thence 800 meters north west to trail, thence 400 meters west Upper Oligocene Co.iimar formation.
'l'hc· new specie's is named in honor of Mr. W. n. Chawncr, gcologi.<>t, to whom J am indebted for knowledge of Ll1e type locality.
i':XPLANATION Ol!' PLATES
PtAH: 12
T•'tOUHt; l. T orrduo lo•·r..i n. ~;en., n. sp. Hclotype. x:.:o. l'alm.r Sta. llll!),
· ~ f.lfratJdrop.riua rutttni 11. SJ). Holotype;:. xl5 . Xca r Rral C;:una,illn, 10 kilometers southeast of A~;uada de Pasajcros, Santa Clara l'rovincc. '
J.- 1'orrr ina tort•ci n. gen. , n. s p. Exterior. x20. P" lm er S ta . llU!l.
~.-V""fll•ardn<> cubrnsis n . gen .• n . sp. Coty pc. x20. Pal me •· S t a. I J I '1.
0.- 0prrc·ulil'<l bcrrmtdcti n. sp. Col)'llc, xlO. J>:liu •er !St:L 7fi7. ] Iori · t.ontn l scclion mic·rosphcric form.
7.- 0J>t'>'l'ulr'tm brrt~wdcti n . s p. Coty11c. x lO. Palmer Stn. 757. Vntlt-a l section ncar cenlt:r.
8 .
0.
Op··•·culint' bt·ruMrtlr.zt: n. s p. xl 0. Pill me r Stn. 81 '..! , o n r·:d lru:ul .5 kilt•· meLc1· south nf Ct·ut.ral .S;1n Antoni o. 1-ravaua .Pruvince. B1·okcu huL v e l')' typicnl :-.pcc imt:.ll .
Opt•t·culilla bcm~~tdc:i u. sp. xlO. Palmer S ta. 8:12. Exterior uf "'""II specimen.
Mc.,alos"hcric cotn>c. x 10. Palmer Sta . 1120. FJOuRR 1.-!Camcrilta dickcrsoni n. btl. e , .
1 · { •galosphcri c form s hcJw · ., - rCc:tJF't'inCJ dickcr.so11i n . ~;p. npt·rturn v1cw o nu · · •· wing canal c rossing septum dors:1l to aperture. Palmc·r Sta. 1120.
3.-rCamcrina cubcnsi.r n . SJl . H olotypc . Vcntml vic·w. X' IO.
4.-!Camrn'na dirl.-rr.soui n. s p. Mi c,·nsplu! ric cotypc. X LO. Dorsal view. Palmer Sta. 1!20.
5.-!Can11•riua. c·uht·,.,ds n . sp. l lololype. l)orsal view. x<tO.
6.- ?Cameri1ur. dic/tf'rsoni n. s p. ~1 icrn~11 hc t· i ..: cotypc. x.·l 0, Apt!rtural view. Palmer St<1. U20.
7.-?Ctzmerhw cubcusis n. sp. ltolotypc. Apt:rt llt'al view. x41J.
8.- C:cmu:riua .didu.:rsoui n. s p. Mi ci'OS()hcri..: coLypc. x•IO. Vcntrnl view.
Palmer Sta. 1120.
9.-!A.rtcrorbis cubcusi.r n. sp. t:otypc. Vcrlicnl l"l.·ction. !118. t'a lmer
Sta. 115.
r .. it•rrsidad de la ll abana
FIOUJU~ l.- Opro·culinrlla cojimorcnsis n. sp. Cotype. x8. Ilorizontal section of mcg;olospheric specimen. Palmer Sta. 405.
