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15 Cards in this Set
- Front
- Back
Characteristics of Chordates
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1. notochord
2. a dorsal 3. hollow nerve cord 4. phayngeal slits 5. post-anal tail |
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Tunicates
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marine suspension feeders call sea squirts; lose chordate qualities
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Lancelets
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marine suspension feeders that retain the hallmarks of the chordate body plan as adults
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Characteristics of Craniates
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1. a head with a skull, brain, eyes, and sensory organs
2. develop from cells called a neural crest |
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Hagfishes
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1. jawless, marine craniates with a cartilaginous skull
2. have an axial rod of cartilage derived from the notochord 3. lack vertebrae |
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vertebrates
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1. have a vertebrae
2. elaborate skull 3. aquatic forms have fins or rays |
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Lampreys
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1. Jawless
2. cartilaginous segments surrounding the notochord over nerve cord |
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Origins of Bones and Teeth
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mineralizationoriginated from veretbrate mouth parts
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Characteristics of Gnathostomes
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1. has a jaw
2. enhanced sensory system 3. extensively mineralized endoskeleton |
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Chondricthyans
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1. a cartilaginous skeleton
2. examples sharks, rays and relatives |
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Osteichthyans
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1. skeleton reinforced by calcium phosphate
2. aquatic forms have bony gill covers and a swim bladder |
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Ray-Finned Fished
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maneuverable fins supported by long rays
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Lobe-Fins
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1. coelacanths, lungfish, tetrapods
2. aquatic; muscular pedtoral and pelvic fins |
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tetrapods
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1. four limbs and feet with digits
2. also have ears |
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amphibians
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1. moist skin that helps the lungs in gas exchange
2. salamanders, frogs, and caecilians 3. frogs and salamanders undergo metamorphosis of aquatic larva into a terrestrial adult |