Class Reptilia

BIO 2215 Oklahoma City Community College Dennis Anderson

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Class Reptilia • Scales • Amniotic egg • One occipital condyle • Ectothermic • Three chambered heart – Alligators have 4 • Claws 2

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Amniotic Egg 4

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Ectothermic 8

Reptile Skulls • Anapsid – No opening • Synapsid – One opening • Diapsid – Two openings • Euryapsid – One small opening 9

• Turtles Anapsids 10

• Dinosaurs • Snakes • Lizards • Crocodilians • Birds Diapsids 11

Dinosaurs

Dominate animals in Mesozoic Era

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• Extinct • Ichythyosaurs Euryapsid 13

Synapsids • • Pelycosaurs

Dimetrodon

– Mammal like reptile 14

Order Testudines • No teeth in adult • Shell • Anapsid 15

Turtle Shell Carapace Plastron 16

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Box Turtle

Terrapene

• Adapted to live on land – Feet not webbed – High domed shell – Safe 18

Red-Eared Slider

Trachemys

• Red stripe behind eye • Live in or near water – Ponds – Slow moving water • Pets • Carry

Salmonella

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Snapping Turtle

Chelydra

• Live in water • Lay eggs on land • Long tail • Muscular limbs 20

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Giant Tortoise Lifespan 150 Years 22

Leatherback Sea Turtle • 6 feet long • 1,400 pounds 23

Order Squamata • Kinetic skull – Movable joints • Lizards • Snakes • Dinosaurs 24

Geckos • Small lizards • Adhesive toe pads 25

Gecko Toe Pads

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• Color is variable • Slender body • Small scales Wall Lizard

Lacerta

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Texas Horned Lizard • Spines for protection • Eats ants • Endangered species 28

Gila Monster • Poisonous lizard • Not very aggressive 29

Green Iguana • Ornamental crest • Five feet long • Tropical rainforest – Mexico – South America • Omnivores 30

Chameleons • Arboreal • Africa and Madagascar • Catch insects with tongue 31

Komodo Dragon • Attack and eat humans • 10 feet long • 300 pounds • Indonesia 32

Snakes • No legs • No external ears • Jacobson’s organ – Sense smell with aid of tongue • Cornea of eye protected with a spectacle – transparent membrane • Skull bones loose – Swallow large prey 33

Swallow Prey 34

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Snake Venom 37

Oklahoma Snakes Poisonous Nonpoisonous 38

Copperhead

Agkistrodon

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Cottonmouth or Water Moccasin

Agkistrodon

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Western Diamond Backed Rattlesnake

Crotalus

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Prairie Rattlesnake

Crotalus

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Timber Rattlesnake

Crotalus

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Black Rat Snake 44

Diamond Backed Watersnake

Nerodia

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Green Snake 46

Coral Snake 47

Order Crocodilia • Crocodiles • Caimans • Alligators • Gavials • Elongated skull • Four chambered heart 48

Alligator 49

• Elevated eyes Caiman 50

Gavial 51

Alligator Caiman Crocodile Gavial 52

The End

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