Marmosa

The nineteen species in the genus Marmosa are relatively small Neotropical members of the family Didelphidae. This genus is one of three that are known as mouse opossums. The others are "Thylamys" (the "fat-tailed mouse opossums") and "Tlacuatzin", the grayish mouse opossum. Members of the genus "Marmosops" used to be called "slender mouse opossums", but are now just called "slender opossums". The six members of the "Marmosa" subgenus "Micoureus", known as "woolly mouse opossums", were formerly considered to be a separate genus, but were moved into "Marmosa" in 2009. Based on a comparison of sequences of one mitochondrial and three nuclear genes, three new subgenera, "Eomarmosa", "Exulomarmosa" and "Stegomarmosa", were recognized by Voss "et al." in 2014. "Eomarmosa" and "Exulomarmosa", as well as "Marmosa" and "Micoureus", are thought to be sister taxa, while "Stegomarmosa" is viewed as sister to "Marmosa" plus "Micoureus". "Exulomarmosa" is a mostly trans-Andean (west of the Andes) clade.
Subgenus "Eomarmosa" 
Subgenus "Exulomarmosa" 
Subgenus "Marmosa" 
Subgenus "Micoureus" 
Subgenus "Stegomarmosa" 