Clarifiers

Dinosaurian Synapomorphies Found In Archaeopteryx
Dinosaurian Synapomorphies Found In Archaeopteryx
Dinosaurian Synapomorphies Found In Archaeopteryx ------------------------------------------------------------------------ As promised, here are the derived characters with which Gauthier (in his 1986 paper) unites Archaeopteryx with modern birds, outside of all other theropods (with Gauthier's original clarifiers in parens) [and with my editorial comments in brackets]: Premaxillae elongate, narrow, and more pointed anteriorly, with longer nasal processes [similar condition in bullatosaurs, and