Details

Title: !Fishes 2

Description: Cladistics

Total Flash Cards: 8

Created: 11/10/2009 22:26:31

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Term
cladistics
 Definition
classifies taxa into monophyletic groups on basis of genealogy; shared common traits and shared unique traits
Term
genealogy
 Definition
branching pattern of evolutionary history; branching diagrams used in cladistics=cladogram
Term
monophyletic taxa
 Definition
single evolutionary origin, all decendents of anscestor are placed in taxon; also called clades
Term
polyphyly
 Definition
do not share single evolutionary origin; common anscestor of all members of taxon not in taxon
Term
paraphyly
 Definition
single origin(anscestor is member of taxon), but some descendents placed in another taxon
Term
plesiomorphic
 Definition
shared traits (anscestral)
Term
apomorphic
 Definition
unique traits (derived)
Term
synapomorphic
 Definition
shared unique traits (derived)