BIOL 2030 Lecture Notes - Lecture 20: Bird Anatomy, Coracoid, Pygostyle
17 Sep 2015
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Subphylum vertebrata aves lecture 20: have 2 subclasses, 1. Solid link between birds and dinosaurs: half reptilian and half bird (superficially more bird-like, big jaws with lost of teeth, covered in feathers, 2. Has 2 superorder: paleognathae (old jaw, flightless birds. E. g. ostrich: neognathae (new jaw, have flightless birds as well (e. g. penguin, new structure of jaws. Note: all vertebrates can fly (have some representation of flight) this includes amphibians & reptiles gliding, jumping and mammals have flapping flight but only birds have mastered flying. Reason why when we see a bird when know it"s a bird!: modification for flight, 1. Power- promoting adaptation: argentavis magnificens (teratron: extinct condor, largest bird we know off 80kg, largest wing span of fossils . 4 orders of magnitude different (not much: been hummingbird, smallest bird ~2. 0g, great bustard, largest bird living ~20 kg.
