112-pp29 - UNIVERSITY OF SOUTH ALABAMA Last time we...

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1 GY 112: Earth History UNIVERSITY OF SOUTH ALABAMA Paleozoic Life forms 3: Chordates (Reptiles and Mammals) Last time we covered… Chordates 1 (Fish) A) The first animals with backbones (conodonts) B) The fish family tree C) Other key chordate evolutionary events Vertebrate Evolution Vertebrate Evolution But like the plants, the diversity of the fish really exploded once we hit the Devonian (also called the Age of the Fishes) Phylum: Chordata Sub-Phylum: Vertebrata Class: Agnatha (jawless fish, lampreys etc.); Camb-Recent ( D ) Acanthodii (spiny sharks); O-P ( M-P ) Placodermi (armored jawed fish); S-M ( D ) Chondrichthyes (sharks, rays, skates); S-Recent ( J-Recent ) Osteichthyes (boney fish); D-Recent ( J-Recent ) Vertebrate Evolution But like the plants, the diversity of the fish really exploded once we hit the Devonian (also called the Age of the Fishes) Age of the Fishes Today’s Agenda Chordates 2 (Reptiles - Mammals; web notes 28) A) Fish to Amphibians B) Amphibians to Reptiles C) Reptiles to Mammals
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2 Vertebrate Evolution Ray-finned Osteichthyes Lobe-finned Osteichthyes
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This note was uploaded on 02/04/2012 for the course GLY 112 taught by Professor Haywick during the Spring '12 term at S. Alabama.

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112-pp29 - UNIVERSITY OF SOUTH ALABAMA Last time we...

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