A New Genus for Aepeomys fuscatus Allen, 1912, and Oryzomys intectus Thomas, 1921: Enigmatic Murid Rodents from Andean Cloud Forests
- 1 June 2002
- journal article
- Published by American Museum of Natural History (BioOne sponsored) in American Museum Novitates
- Vol. 3373 (1) , 1-42
- https://doi.org/10.1206/0003-0082(2002)373<0001:angfaf>2.0.co;2
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... Resumen Dos especies nominales de roedores múridos neotropicales (subfamilia Sigmodontinae) que habían sido ubicadas durante mucho tiempo en géneros diferentes, se asignan a un nuevo género reconociendo sus diferencias con otros taxones nominales supraespecíficos. Aepeomys fuscatus Allen y Oryzomys intectus Thomas comparten una combinación única de estados de caracteres externos y craneodentales, que permiten diagnosticar a Handleyomys como un género nuevo, con fuscatus como su especie típica. Las comparaciones morfológicas entre Handleyomys y las especies típicas de los géneros Aepeomys Thomas y Oryzomys Baird proveen una base para hacer deducciones preliminares sobre sus relaciones filogenéticas. La hipótesis de que Handleyomys es un orizomino está apoyada por cinco estados de caracteres compartidos derivados, pero los datos disponibles no indican una relación estrecha entre el nuevo género y ningún clado particular de orizomino. Todos los espécimenes conocidos de Handleyomys provienen de de las Cordill...Keywords
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