Lepidosaurs 0.0 / 5 ? zoologylizards/snakesUniversityNone Created by: phoeberbCreated on: 20-05-19 16:06 What is a lepidosaur? reptiles with overlapping scales, Squamata and rhynchocpehalia 1 of 12 features of rotating ankles two axis of rotation, astragalus has peg which fits into the calcaneum, rotation occurs here 2 of 12 features of pleurodont teeth primitive, fused too jaw bone, polyphydont 3 of 12 features of acrodont teeth firmer jaw attachment, sometimes monophydont 4 of 12 caudal anatomy and tail loss lose tail to escape, controlled break along fracture plane, cartilage replaces vertebrae 5 of 12 skin shedding shed patches or their entire skin 6 of 12 5 clades of lepidosaurs gekkota (geckos), scinocoidea (skinks) lacertoidea (true lizards) iguania (bearded dragons, chameleons etc) anguimorpha (monitor lizards etc) 7 of 12 features of notched tongue tip chemoreception, chemicals collected by fenestra with sensory epithelia 8 of 12 features of hemipenes paired intromittent organs out of cloaca, one teste for each hemipenes, can be used for ID, lack erectile tissue 9 of 12 how many times have viviparity evolved in lepidosaurs 115/140 10 of 12 female organs in viviparity increased uterine vasculature, loss of shell secreting glands 11 of 12 regular female organs ovaries, infundibulum, shell gland, non-glanded uterus, vagina 12 of 12
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