Intro To Human Origins ( Primate Classification )

Monophyletic

A grouping of species that share a common ancestor and includes all of that ancestor’s descendants

Paraphyletic

A grouping of species that share a common ancestor, but does not include all of the

descendants of that ancestor

Polyphyletic

A grouping of species that do not share a single common ancestor to the exclusion of other groups

Homology

Feature similarity due to the inheritance of that feature from the last shared common ancestor

Analogy

Feature similarity due to a shared function or environment

Prognathic

A protruding snout

Orthognathic

A reduction in snout size