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A cladistic analysis of 50 characters from 26 taxa of coregonine fishes and two outgroup taxa yields a phylogenetic tree with two major branches, best summarized as two genera - Prosopium and Coregonus. Presence of teeth on the palatine, long maxillae, and long supra-maxillae are primitive, whereas loss of teeth, short or notched maxillae, and short supermaxillae are derived traits. P. coulteri and C. huntsmani are morphologically and phylogenetically primitive members of their groups. The widespread species, P. cylindraceum and P. williamsoni are morphologically advanced in parallel with the subgenus Coregonus (whitefishes): they share subterminal mouths, short jaws, and reduced teeth. Prosopium gemmifer parallels the ciscoes, subgenus Leucichthys. The whitefishes, C. ussuriensis, C. lavaretus, C. clupeaformis, and C. nasus are a monophyletic group, the subgenus Coregonus. The subgenus Leucichthys is a diverse, relatively plesiomorphic assemblage, widespread in the Holarctic region. This assemblage includes the inconnu, Stenodus.
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Morphological cladistic study of coregonine fishes