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Reptiles ESS Unit 7. 4 Living Orders Squamata – snakes and lizards Crocodilia – crocodiles and alligators Testudinata – turtles and tortoises Sphenodonta.

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Presentation on theme: "Reptiles ESS Unit 7. 4 Living Orders Squamata – snakes and lizards Crocodilia – crocodiles and alligators Testudinata – turtles and tortoises Sphenodonta."— Presentation transcript:

1 Reptiles ESS Unit 7

2 4 Living Orders Squamata – snakes and lizards Crocodilia – crocodiles and alligators Testudinata – turtles and tortoises Sphenodonta – tuataras

3 Squamata Lizards – Legs with clawed toes – Moveable eyelids – Moveable lower jaw (hinged) – Tympanic membranes – Examples: Iguanas and geckos Snakes – Legless – Shorter tails – Lack movable eyelids – Moveable lower jaw (hinged) – Some venomous/ some constrictors – Examples: Rattlesnakes and Boas

4 Crocodilia Four chambered heart – Which allows for quicker movement, stronger muscles Examples – Crocodiles Long /Narrow snout Sharp teeth – Teeth very similar to dinosaurs and early birds Powerful jaws – Alligators Wider snout Upper jaw wider than lower jaw

5 Testudinata Protective Shell – Upper (dorsal) part is called carapace – Lower (ventral) part is called plastron Most turtles have ribs and vertebrae fused to dorsal shell Some aquatic (turtles)/ some land (tortoises) No teeth – sharp beak

6 Tuataras Large and lizard-like Found only on islands off the coast of New Zealand Spiny crest down back Third eye on top of head (covered w/scales but can sense light) Distinctive teeth – 2 rows on top, 1 on bottom 2 species


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