Family Cheloniidae Marine Turtles Paddle-like limbs

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Presentation transcript:

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

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

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

Loggerhead Prefrontal scales

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

Green Turtle Prefrontal scale

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

Atlantic Hawksbill

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

Kemp’s Ridley

Family Dermochelyidae Leatherback Turtle Dermochelys coriacea

Leatherback Smooth, scute-less carapace 7 prominent keels

Leatherback

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