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Family Cheloniidae
Marine TurtlesPaddle-like limbs
- shaped carapaces covered in scutes
Include some of the largest living turtles
Family Cheloniidae
LoggerheadCaretta caretta
Green TurtleChelonia mydas
Atlantic HawksbillEretmochelys imbricata
Kemp’s RidleyLepidochelys kempi
Loggerhead
5 or more costal scutes1st costal touching nuchal3 scutes on bridge
costals
LoggerheadPrefrontal scales
Green Turtle
4 costal scutes1st costal not touching nuchal4 scutes on bridge
costals
Green TurtlePrefrontal scale
Atlantic Hawksbill
4 costal scutes1st scute not touching nuchal4 scutes on bridge
Atlantic Hawksbill
Kemp’s Ridley
5 costal scutes1st costal scute touching nuchal4 scutes with pores on bridge
Kemp’s Ridley
Family Dermochelyidae
Leatherback TurtleDermochelys coriacea
Leatherback
Smooth, scute-less carapace7 prominent keels
Leatherback
Leatherback
Endothermic?!Core body temp of 25C
How?Large sizeLayer of blubberCountercurrent heat exchangersHigh metabolic rateHigh levels of hemoglobin