Term
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Definition
Superclass: Agnaths
Order: Myxiniformes
Family: Myxinidae
Eel like fishes with sucking funnel shaped mouth surrounded by barbels. Burrow into dead or dying fish and burrow from inside out |
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Term
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Definition
Superclass: Agnaths
Order: Petromyzoniformes
Family: Petromyzontidae
Eel like fishes with a sucking mouth armed with horny teeth. Freshwater and parasitic. 7 pairs of gill pores. |
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Term
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Definition
Order: heterodontiformes
Family: Heterodontidae
Two dorsal fins, both with heavy spines. Anal fin. 5 gill slits, no nictitating membrane. Anterior teeth are sharp, posterior teeth are molariform. Spiral egg case. |
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Term
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Definition
Order Chimaeraforms
Family Chimaeradae
Ratfish have 2 dorsal fin, one with spine. Mouth is inferio |
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Term
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Definition
Order: Chimaeraformes
Family: Chimaeridae
Chimeras have 4 gills with operculum. Lack scales as adults. Upper jaw fused to neurocranium. No stomach or ribs. Males have "tenacula" on forehead used for reproduction. |
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Term
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Definition
Order: Carcharhiniformes
Family: Scyliorhinidae
Long snouts and long mouth on depressed head. Anal fin is present, and ventral nictitating membrane |
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Term
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Definition
Order: Carcharhiniformes
Family: Triakidae |
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Term
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Definition
Order: Lamniformes
Family: Lamnidae
Elongate snout and cylindrical trun k. The mouth is ventral, dorsal in front of the pelvics. Nictitating membranes are absent |
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Term
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Definition
Order: Hexanchiformes
Family: Hexanchidae
6 or 7 pairs of gill slits and a single dorsal fin posterior to the pelvic fins. Anal fin and no nictitating membrane |
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Term
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Definition
Order: Squaliformes
Family: Squalidae
No anal fin and 2 dorsal fins sometimes preceded by a dorsal spine on one or both. No nictitating membrane membrane |
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Term
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Definition
Family: Squantiformes
Order: Squantidae
Traits typical of rays and sharks. Pectoral fins are not fused to the head. No anal fin and both dorsal fins are attached posterior of pelvic fins |
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Term
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Definition
Order: Rajiformes
Family: Rhinobatidae
Rhomboid or oval body shape. Two dorsal fins far back on tail. Single row of middorsal spines |
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Term
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Definition
Order: Rajiformes
Family: Rajidae
Slender flattened tail with two dorsal fins. Denticles on some portions of the head. Caudal fin reduced or absent |
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Term
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Definition
Family: Rajiformes
Order: Torpedinidae
Flabby oval disk and a short tail with well developed caudal fin. Kidney shaped electric organ located at base of each pectoral fin |
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Term
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Definition
Family: Rajiformes
Order: Dasyatidae
One or more barbed stingers along the tail. No caudal fin. 1 or no dorsal fin. |
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Term
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Definition
Family: Rajiformes
Order: Myliobatidae
Flap the pectoral fins for propulsion. Tail is long and wiplike |
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Term
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Definition
Family: Rajiformes
Order: Mobulidae
Cephalic lobes. Long gillrakers are present |
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Term
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Definition
Family: Rajiformes
Order: Pristidae
Long flat snout which has teeth of equal length. |
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Term
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Definition
Order: Polypteriformes
Family: Polyperidae
Thick bodied eel like fish. Dorsal fin composed of 5-18 finlets. Ganoid scales |
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Term
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Definition
Order: Acipenseriformes
Family: Acipinseridae
Scaleless and have five rows of bony plates. Caudal fin is strongly heterocercal. Very long lived |
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Term
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Definition
Family: Semionotiformes
Order: Lepisostidae
Long thin fish with elongate jaws lined with several rows of needlelike teeth. Heavy ganoid scales. |
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