Term
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Definition
| This roup is distinguished from other vertebrates by up to 6 pairs of lateral fins in additon to those of gnathostomes. |
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Definition
| These are semiaquatic predators with long snouts armed with numerous teeth. |
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Definition
| Feathers are the distinguishing features of this diverse group. |
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Term
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Definition
| These are the only vertebrates with shoulders and hips inside the ribs. |
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Term
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Definition
| Animals in this group had a solid carapace, pierced by the mouth and with eye and external gill slits. They lacked any paired appendages. |
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Term
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Definition
| Animals in this group have a thick bony shield, covering the anterior of the body, but with separate head portion and trunk portion. |
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Term
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Definition
| Animals in this phylum have: a notochord, a dorsal hollow nerve cord, a muscular postanal tail, and an endostyle. |
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Term
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Definition
| This group includes lizards and snakes and can be identified by scale covered skin and by charachteristics of the skull. |
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Term
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Definition
| These are small, superficially fish like marine animals. This subphylum includes the amphioxus. |
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Term
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Definition
| These have a vascularized chamber in the rear of the head where gas exchange takes place. |
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Term
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Definition
| This group is from the mid-silurian to the devonian. They were characterized by the presence of a comveing of dermal bone. They lacked jaws, but some had movalbe mouth plates. More derived froms had lateral paired appendages. |
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Term
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Definition
| This group includes all vertebrates with jaws. |
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Term
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Definition
| This group includes both ray finned fishes and lobe finned fishes. |
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