Term
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Definition
| only living descendants of ostracoderms |
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Term
| Class Petromyzontida (Phylum Chordata) |
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Definition
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Term
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Definition
| worldwide distribution; most anadromous (ascend rivers & streams to spawn) |
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Term
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Definition
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Term
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Definition
| segmented muscles in ammocoetes |
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Term
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Definition
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Term
| ammocoete important anatomy: |
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Definition
-oral hood w/ papillae
-lateral groove w/ gill slits
-fins
-myotomes
-chromatophores scattered over body
-nerve cord, brain, notochord
-velum (pair of flaps that create water currents)
-gill bars & lamellae
-endostyle, esophagus, intestine, cloaca, liver, gallbladder, heart, kidney |
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Term
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Definition
-2 dorsal fins & a caudal fin
-buccal funnel
-nostril, mouth, & tongue
-pineal organ ("3rd eye") |
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Term
| Class Chondrichthyes (Phylum Chordata) |
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Definition
| cartilaginous fish (sharks, rays, etc) |
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Term
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Definition
| pair of pectoral, pair of pelvic, pair of dorsal, caudal |
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Term
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Definition
-rostrum (snout)
-spiracles (modified gill slits)
-placoid scales
-peritoneum (parietal and visceral)
-liver, gallbladder, esophagus, stomach, pancreas, spleen, rectum
-pyloric valve (regulates entrance of food into intestine)
-rugae (longitudinal folds of stomach) |
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Term
| Class Actinopterygii (Phylum Chordata) |
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Definition
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Term
| chief characteristics of bony fish |
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Definition
dermal scales
operculum over gill chamber
bony skeleton
terminal mouth
swim bladder
homocercal tail
median & paired fins |
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Term
| Class Amphibia (Phylum Chordata) |
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Definition
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Term
| important characteristics of frogs |
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Definition
axial and appendicular skeletons for land (w/ skeletal muscles; gastrocnemius = "calf muscle")
teeth, "reverse" tongue, glottis |
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