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!Fishes 2
Cartilaginous Fishes; Class Chondrichthyes: Subclass Holocephali
7
Biology
Undergraduate 4
11/11/2009
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Term
evolutionary history
 Definition
late devonian, coincident w/ elasmobrach fossils
Term
jaw
 Definition
upper jaw fused to neurocranium: holostylic or autostylic suspension; nonprotrusable jaw
Term
gill
 Definition
single gill opening w/ operculum
Term
teeth
 Definition
grinding plates
Term
feeding
 Definition
hard-shalled inverts
Term
dorsal
 Definition
first dorsal w/ venemous spine
Term
reproduction
 Definition
males have clasper on forehead: tentaculum; oviparous, direct development
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