ZOOL224 Lecture Notes - Lecture 3: Lungfish, Fish Anatomy, Premaxilla
9 Dec 2016
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Zoology 224 lecture outlines fall 2016 from the chondrichthyes to the tetrapoda. Note: images reproduced in these outlines have been included under section 29 of the copyright act, as fair dealing for research, private study, criticism or review. Note: these outlines contain some but by no means all of the figures and topics that you will be responsible for in the quiz, midterm, and final exam. See posted lecture notes and any assigned lecture material for more complete coverage of all the material you will be responsible for. synapomorphies of the major chondrichthyan groups. Chondrichthyes chondrichthyan evolution only rat shes survive early radiation most extant groups. Jurassic (200 mya) earliest radiations devonian (400 mya) chondrichthyan diversity. Neoselachii (the extant elasmobranchs) multiple lateral gill openings with ventral mouth, hyostylic jaw suspension. 400 sp open water e. g. , requiem, thrasher basking, whale, great white, hammerhead. 160 sp. benthic e. g. , dogfish, angel, sleeper, cow, megamouth. Many dominate marine ecosystems as top predators.
