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Class Reptilia(Turtles, crocodiles, lizards, snakes)• Dry skin with epidermal scales• Skull with one point of articulation with the vertebral column (occipital condyle)• internal fertilization• amniotic eggs.Order Testudines(Turtles & Tortoises)• Bony shell - carapace (dorsal) & plastron (ventral).• Limbs articulate internally to ribs.• Keratinized beak rather than teeth.• Oviparous (producing young by means of eggs).Order Crocodylia(Crocodiles, alligators, caiman, & gavials)• Archosaurs- characterized by teeth set intosockets in the jaws (thecodont condition),muscular gizzards, and skull openings in front of the eyes.• Secondary palate – separates the nasal andmouth passageways.• Oviparous with parental care.Order Sphenodontida(Tuataras)• Lepidosaurs are characterized by the presence of overlapping keratinized epidermal scales, regular shedding cycles of the outer epidermal layer.• Akinetic skull – has an upper jaw firmly attached to skull.• 2 rows of teeth on upper jaw. 1 row of teeth inlower jaw.• Oviparous.Order Squamata (lizards, amphisbaenians & snakes)• Kinetic skull - moveable quadrate bones and other skull modifications.• Suborder Sauria—lizards, geckos, iguanas.• Usually two pairs of legs.• Upper and lower jaws unite anteriorly.• Oviparous, ovoviviparous, or viviparous.• Includes legless amphisbaenias - take the quiz
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