The Chordates

The Chordates - BSC 2011L AnimalTaxonomy(cont Dorsal...

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BSC 2011L
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Animal Taxonomy (cont.)
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Chordate Characteristics Dorsal tubular nerve cord S Dorsal supporting rod, notochord S Post anal tail S Pharyngeal pouches that become gill slits
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Phylum Chordata Subphylum Urochordata Tunicates or sea squirts Gill slits are only remaining characteristic of chordates in adults
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Phylum Chordata Subphylum Cephalochordata Amphioxus Shallow marine waters Buried in substrate with anterior portion sticking out Digestion – complete (filter) Circulation - closed
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Phylum Chordata Subphylum Vertebrata Notochord replaced by vertebral column Jointed skeleton Skull that protects well developed brain Extreme degree of cephalization Well developed muscles Extremely mobile Reproduction is usually sexual
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Vertebrate Anatomy
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Phylum Chordata Subphylum Vertebrata Superclass Agnatha Jawless fish
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Phylum Chordata Subphylum Vertebrata Superclass Gnathostoma Animals with jaws
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Phylum Chordata
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The Chordates - BSC 2011L AnimalTaxonomy(cont Dorsal...

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