1 Ch. 9: Marine Reptiles, Birds, & Mammals Marine Reptiles

2 I) Origins A)Vertebrates invaded land ~350 MYA 1)Evolved from fish-like ancestors with lungs & two pairs of limbs a)Tetrapods: four-footed B)Descendants include classes Amphibia, Reptilia, Aves, & Mammalia

3 II) Marine Reptiles A)Class Reptilia includes ~7,000 lizards, snakes, turtles, & crocodiles B)Dry skin covered with scales to prevent H 2 O loss C)Poikilotherms & ectotherms 1)Cold-blooded D)Descendents also include birds & mammals

4 III) Sea Turtles

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6 A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

7 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

8 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

9 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

10 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

11 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

12 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

13 III) Sea Turtles A)Order Testudinae B)Reptiles with bodies enclosed in a carapace (armor-like shell) fused to backbone C)Legs modified into flippers D)All return to land to lay eggs, but breed at sea 1)Females return to beach they were born E)Eight species 1)Family Cheloniidae a)Black, Green, Flatback, Hawksbill, Kemps Ridley, Loggerhead, Olive Ridley 2)Family Dermochelyidae a)Leatherback

14 IV) Other Marine Reptiles

15 IV) Other Marine Reptiles A)Order Squamata 1)Sea Snakes a)Highly poisonous; related to cobras b)Dorsoventrally flattened c)Ovoviviparous

16 IV) Other Marine Reptiles

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18 IV) Other Marine Reptiles A)Order Squamata 2)Marine Iguanas a)Pacific coast of South America

19 IV) Other Marine Reptiles

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26 IV) Other Marine Reptiles B)Order Crocodilia 1)Saltwater crocodiles 2)Mangrove swamps of Eastern Indian Ocean, Australia, & some Pacific islands 3)Most aggressive of all marine animals

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