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Unformatted text preview: 11/14 Beaches of NW Michigan Petoski stones Devonian 408-360 MY Evolution of fishes Agnatha: Jawless fishes- lamprey Invasive species come to great lawerence of the great lakes Salmon eat lampreys Ostracoderms- earliest fish also with no teeth Silurian Placoderms: have jaws and are serious predators Chondrichthyes: sharks and rays Crossopterygians:lobe-finned Latimeria Fossils Petowsky stone Coral Devonian Age of fishes Adaptive radiation Most of major kind of fishes we would recognize today Earliest fishes Agnatha jawless fishes, lampreys Invasive species in Great Lakes Have to be controlled Salmon have been introduced to eat lampreys Ostracoderms Armor plated bottom feeders Silurian Placoderms Fish develop jaws / teeth Due to gills Results in serious predators Chrondrichthyns Sharks and Rays Crossopterygians Lobe finned...
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This note was uploaded on 01/18/2012 for the course ISB 200 taught by Professor Ralphtaggart during the Fall '09 term at Michigan State University.
- Fall '09