1. Family Cheloniidae Marine Turtles Paddle-like limbs
- shaped carapaces covered in scutes
Include some of the largest living turtles

2. Family Cheloniidae Loggerhead Green Turtle Atlantic Hawksbill
Caretta caretta
Green Turtle
Chelonia mydas
Atlantic Hawksbill
Eretmochelys imbricata
Kemp’s Ridley
Lepidochelys kempi

3. Loggerhead 5 or more costal scutes 1st costal touching nuchal
3 scutes on bridge
costals

4. Loggerhead
Prefrontal scales

6. Green Turtle 4 costal scutes 1st costal not touching nuchal
4 scutes on bridge
costals

7. Green Turtle
Prefrontal scale

8. Atlantic Hawksbill 4 costal scutes 1st scute not touching nuchal
4 scutes on bridge

9. Atlantic Hawksbill

10. Kemp’s Ridley 5 costal scutes 1st costal scute touching nuchal
4 scutes with pores on bridge

11. Kemp’s Ridley

12. Family Dermochelyidae
Leatherback Turtle
Dermochelys coriacea

13. Leatherback
Smooth, scute-less carapace
7 prominent keels

14. Leatherback

15. Leatherback Endothermic?! How? Core body temp of 25C Large size
Layer of blubber
Countercurrent heat exchangers
High metabolic rate
High levels of hemoglobin