Details

Title: !Fishes 2

Description: Bony Fishes: Osteichthyes: Class Actinopterygii: Subclass Chondrostei: Order Acipenseriformes

Total Flash Cards: 9

Created: 11/11/2009 09:40:57

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Cards in this set:

Term
Acipenseriformes
 Definition
sturgeons and paddlefish
Term
synapomorphies
 Definition
extant forms diff from origional members, difficult to identify; cartilaginous skeleton, originally bony
Term
tail
 Definition
heterocercal
Term
intestine
 Definition
spiral valve
Term
scales
 Definition
ganoid
Term
history
 Definition
some extant groups known from triassic
Term
sturgeon
 Definition
family acipenseridae; lots of eggs, anadromous and fw; largest fw fish; 5 rows bony scutes; 4 barbels anterior and inferior; protrusible mouth(no teeth);ampullary(electrical)organ; spiracle;benthic feeder;hard curved spines pectoral fin;long fw migration
Term
Family Polypteridae
 Definition
lobed pectoral fins;spiracle;ganoid scales;dorsal fin w/ finlets w/ single spine each and 1 or more rays; paired lungs; spiral intestine; heterocercal caudal fin
Term
Paddlefish
 Definition
family polyodontadae; filter feed zooplankton; pisciverous(fish and inverts);fw;paddle snout, ampullary organ; gill rakers long and numerous; tiny teeth; spiracle, no scales; ram ventilation(must swim);pelvic fin/ureogenital opening