Marmosini

Voss, Robert S., Fleck, David W. & Jansa, Sharon A., 2019, Mammalian Diversity And Matses Ethnomammalogy In Amazonian Peru Part 3: Marsupials (Didelphimorphia), Bulletin of the American Museum of Natural History 2019 (432), pp. 1-89 : 24

Tribe Marmosini

Amazonian members of the tribe Marmosini include small but otherwise strikingly dissimilar taxa. Whereas species of Marmosa are longtailed, black-masked, and almost exclusively arboreal, species of Monodelphis are short-tailed, maskless, and strictly terrestrial. Field identification of Monodelphis is not problematic because these shrewlike opossums do not closely resemble any other Amazonian mammals ( Emmons, 1997), but species of Marmosa bear a superficial resemblance to members of several thylamyine genera, notably Marmosops and Gracilinanus , both of which include species that occur in our region. Voss et al. (2004) and Voss and Jansa (2009) provide descriptions and illustrations of external and craniodental characters that unambiguously distinguish Marmosa from Marmosops and Gracilinanus .