Abstract
Abstract Two nominal species of Neotropical murid rodents (subfamily Sigmodontinae) that have long been referred to different genera are here placed in a new genus in recognition of their distinctness from other named supraspecific taxa. Aepeomys fuscatus Allen and Oryzomys intectus Thomas share a unique combination of external and craniodental character states that diagnose Handleyomys, new genus, with fuscatus as its type species. Morphological comparisons of Handleyomys with the type species of Aepeomys Thomas and Oryzomys Baird provide a basis for preliminary inferences about phylogenetic relationships. Five shared, derived character states support the hypothesis that Handleyomys is an oryzomyine, but no close relationship between the new genus and any particular oryzomyine clade is indicated by the data at hand. All known specimens of Handleyomys are from the western Andes (Cordillera Occidental) and the central Andes (Cordillera Central) of Colombia, where they have been collected at 20 localities r...
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