Phylum Arthropoda
Domain Eukarya Kingdom Animalia Phylum Arthropoda Subphylum ? Class Order Family Genus species
Subphylum Crustacea
copepods, amphipods, isopods, shrimps, crabs, lobsters, barnacles
Subphylum Crustacea – Copepods
- Among the most common animals on earth - Extremely abundant & important in the plankton
Subphylum Crustacea – Barnacles
- How do they feed? - Feathery filtering appendages - Body enclosed by calcareous plates
Subphylum Crustacea – Amphipods
- Compressed form side to side - Live in debris washed ashore, among seaweed, w/in plankton
Alien or Amphipod?
Subphylum Crustacea – Isopods
- Compressed from top to bottom - Found in same areas as amphipods
Subphylum Crustacea – Krill (euphausiids)
- Planktonic, shrimp-like crustaceans - Common in polar waters - Important food source for whales, penguins, fishes
Subphylum Crustacea – Shrimps, Lobsters, Crabs
- Largest group of crustaceans - Decapods (10 legs) - 5 pairs of walking legs (What is the first pair used for?)
Crustacean larvae (babies)
Phylum Echinodermata “spiny skinned”
Water Vascular System and Tube Feet
Domain Eukarya Kingdom Animalia Phylum Echinodermata Class ? ? ? ? Order Family Genus species
Class Asteroidea - seastars
Class Ophiuroidea - brittlestars
Class Echinoidea – sea urchins & sand dollars
Class Holothuroidea – sea cucumbers
Echinoderm Larvae
Seastar Urchin
Brittlestar Sea Cucumber
Which one is a baby: Seastar?
Sea urchin?
Brittlestar?
Sea cucumber?
Phylum Hemichordata
- Link between echinoderms and chordates?? - Larva similar to echinoderms - Dorsal, hollow nerve cord & openings along anterior portion of gut (like chordates)
Phylum Hemichordata
- Link between echinoderms and chordates?? - Larva similar to echinoderms - Dorsal, hollow nerve cord & openings along anterior portion of gut (like chordates)
Phylum Chordata - 3 major groups (subphyla) 2 lack a backbone
1. Dorsal nerve cord
2. Gills slits – openings along front part of gut
3. Notochord – flexible rod for support
4. Post anal tail
Chordate characteristics?
Domain Eukaryota Kingdom Animalia Phylum Chordata Subphylum ? ? Vertebrata Class Order Family Genus species
Subphylum Urochordata (Tunicates)
ascidians, sea squirts, salps, larvaceans
Why are these chordates??
Subphylum Urochordata (Tunicates)
ascidians, sea squirts, salps, larvaceans
Tadpole Larva w/ Chordate Traits
Ascidians (Sea Squirts)
Salps & Larvaceans
Subphylum Cephalochordata
lancelets
Subphylum Vertebrata