Lecture1VertebratesW10

Lecture1VertebratesW10 - Vertebrate Systematics (credits:...

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Click to edit Master subtitle style Vertebrate Systematics (credits: Michael Cramer, Univ. of Notre Dame, Jan. 2009)
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Phylum Chordata Several classes of fish, including: Jawless fishes Sharks and rays Bony fish Class Amphibia (frogs, toads, salamanders) Three classes of reptiles: Class Testudines (turtles, tortoises) Class Lepidosauromorpha (snakes, lizards) Class Crocodilia (alligators, crocodiles) Class Aves (birds) Class Mammalia (mammals)
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Class Amphibia Two stage life cycle Aquatic larvae Terrestrial adult Respiratory structures Gills (larvae) Lungs (adult) Skin Mucous and poison skin glands Three-chambered heart Ectothermic Egg-layers Must lay eggs in or near water Major groups Gymnophiona Caecilians Caudata Salamanders Anura Frogs and toads
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Reptiles Shelled amniotic egg Skin hard and brittle Many have bony plates under scales Three-chambered heart Ectothermic Major groups Turtles Crocodilians Tuatara Lizards Snakes
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This note was uploaded on 01/20/2010 for the course WFC WFC 50 taught by Professor Wfc50 during the Spring '09 term at UC Davis.

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Lecture1VertebratesW10 - Vertebrate Systematics (credits:...

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