Lecture 16, Vert Life 0.0 / 5 ? BiologyBird radiationsUniversityNone Created by: Elysia_DaviesCreated on: 13-12-16 12:49 Palaeognthae ratites and tinamiforms 1 of 13 neognathae galloanserae and neoaves 2 of 13 theropods and birds S shaped neck, tridactyl foot, digitigrade posture, penumatic bones 3 of 13 coelurosaurs and birds furcula, fused sternum 4 of 13 Dromeosaurs and birds flexible and rotating wrists 5 of 13 Archeopteryx poss powered flight, reptile and bird feathers, 6 of 13 Iberomesornis arboreal, strut like coracoid, fused pelvis, pygostyle, reduced foot claws 7 of 13 Enantiornithines improved low speed flight, more skeletal fusin, deeper sternum, alula, shorter tail, teeth 8 of 13 Ichthyornithines modern flight, short back and tail, deep sternum and keel, 9 of 13 big bang diversification palaeontological data 10 of 13 long fuse diversification molecular data 11 of 13 non sinornis features no teeth 12 of 13 factor not needed for adaptive radiation allopatric speciation 13 of 13
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