plosone-phylo
pone.0054311.g009
Hypothesized sequence of mandibular and dental character transformations during odobenid evolution.Dental characters shown on left cladogram, and mandibular characters shown on right cladogram, with diagrams of mandibles adjacent to taxon names; white indicates unknown morphology. Character acquisition and loss mapped directly from results of cladistic analysis, with the exception of ?short tooth row?, which was mapped a posteriori.
pone.0054311.g009
Hypothesized sequence of mandibular and dental character transformations during odobenid evolution.Dental characters shown on left cladogram, and mandibular characters shown on right cladogram, with diagrams of mandibles adjacent to taxon names; white indicates unknown morphology. Character acquisition and loss mapped directly from results of cladistic analysis, with the exception of ?short tooth row?, which was mapped a posteriori.