Lecture 10, Vert Life 0.0 / 5 ? BiologyLepidosaurs UniversityNone Created by: Elysia_DaviesCreated on: 12-12-16 12:46 Synapomorphies of Lepidosaurs Caudal autonomy, Paired hemipenes- lined with ectoderm, skin shedding, epiphysis 1 of 15 when did the lepdiosaurs evolved Traissic 2 of 15 when did squamata and rhyncocephalia separate 240 MYA Traissic 3 of 15 Rhyncocephlia feeding specilaisations strongly implanted teeth, 2nd palate row 4 of 15 Squamate characters Well-developed hemipenes lined with ectoderm, skull kinesis 5 of 15 Serpentes characters extreme cranial kinesis, fused eyelids, protective memebrane over eye 6 of 15 scolecophidia group of serpentes, uncertain monophyly, small and burrowing 7 of 15 Aniloidea serpentes, head same width as body 8 of 15 Macrostomata serpentes, skull is a network of jointed parts 9 of 15 Toxifera serpentes, anguimorpha, iguana 10 of 15 evidence for burrowing snake origin degeneration fo middle ear and ear drums, big stapedial foot plate, shape of semi circular canals, eyes, braincase, tail 11 of 15 Pachyophis mid cretaceous marine hind limbed snake, thethys sea 12 of 15 ttetrapodophis fore and hind limb snake, cretaceous, stem snake poss terrestrail 13 of 15 Najash mid cretaceous, limbed, terrestrial snake, 14 of 15 limbed marine snakes macrostomata 15 of 15
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