Class Reptilia - Mediapolis Community School

Class Reptilia - Mediapolis Community School

Class Reptilia Turtles, Tortoises, Tuataras, Crocodilians, Lizards, and Snakes Classification Domain Eukarya Kingdom Animalia Phylum Chordata

Subphylum Vertebrata Class Reptilia

Order Chelonia Order Crocodilia Order Squamata Order Rhynchocephalia Order Chelonia

Turtles and Tortoises Earliest fossils dated to 200 m.y.a Shell consists of fused boney plates Carapace (Dorsal, top) Plastron (Ventral, lower) 250 species worldwide

Variety of habitats Most species ribs and spine fused to inner surface of carapace Pelvic and Pectoral girdles lie within the ribs

Sharp beak instead of teeth Shell and limbs reflect habitat Turtles

Marine or freshwater Stream lined shells Webbing between toes

Terrapin refers to small aquatic or semi aquatic other than sea turtles Tortoises

Heavy domed shell Retract limbs and head Limbs sturdy with scales Clubbed walking feet

Order Crocodilia Crocodiles, Alligators, Caimans, Gavial Order Crocodilia Most closely related to dinosaurs Heavy bodied, mostly aquatic Carnivorous

Order Squamata Lizards and Snakes Upper jaw is loosely joined to the skull Jacobsons organ Lizards Only 2 species venomous

Gila Monster Bearded Lizard Autotomy Snakes Backbone of 100 400 vertebrates

Pair of ribs attached to each vertebra Seize and swallow prey Constrictors Venom Fangs back of mouth Elapid, inject poison through fixed fangs in front

Vipers, inject venom using large mobile fangs Order Rhynchocephalia Ancient order inhabit few small islands of New Zealand 24 inches in length

Spiny crest that runs down the animals back Tolerate cool temp, burrow during day and hunt at night

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