Fig. 6 in Phylogenetic Studies On Didelphid Marsupials Ii. Nonmolecular Data And New Irbp Sequences: Separate And Combined Analyses Of Didelphine Relationships With Denser Taxon Sampling

Fig. 6. Ventral midcranial view of Caluromys philander (A, AMNH 267002) and Micoureus demerarae (B, AMNH 266428) illustrating taxonomic differences in palatal morphology. In caluromyines the posterior palate slopes gently ventrally, and the palatal margin is arched (concave posteriorly) without strongly projecting lateral corners; the internal nares (in) are very broad. In didelphines, however, the posterior palate is abruptly inflected ventrally and the palatal margin is more­or­less straight with projecting lateral corners (arrows in lower panel); the internal nares are narrow.