BIOL-3030 Lecture Notes - Lecture 16: Cloaca, North Atlantic Gyre, Herbivore
Document Summary
Reptile diversity (part 1 turtles): lecture 16. Sauropsids (a little more refreshment: anapsids: no temporal fenestra, primitive all extinct, diapsids: two temporal fenestrae on each side. Shell covering: keratinized scutes, most species, overlapping bony structures adds strength (like bricks in a wall, skin, 3 aquatic clades that do not have scutes, carettochelyids, trionychidae, dermochelyids. Carapace ii (reduced ossification: african pancake tortoise (malacochersus, flat, soft, and flexible shell, avoids predation by wedging itself into crevices and inflating its body and pushing with its limbs. Turtle lo(cid:272)o(cid:373)otio(cid:374): all sprawli(cid:374)g posture, (cid:271)ut : tortoises (terrestrial, elephantine (club) feet tiptoes with fat pad, freshwater turtles, forefoot paddle varies in degree of webbing, sea turtles and carettochelys, forelimbs modified into flippers. Feeding: no teeth, keratin beak only, turtles can be carnivorous, herbivorous, or omnivorous, tortoises are herbivores, sea turtles are mostly carnivores, most aquatic turtles can only feed in water, several specialized modes of feeding have evolved. Circulation: heart is structurally complex, completely divided atria.
