Order Didelphimorphia Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 3 18 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Gracilinanus microtarsus (Wagner 1842) [Didelphys] microtarsus Wagner 1842 , Arch. Naturgesch., 8 (1): 359 . Type Locality: Brazil , São Paulo , "Ypanema." . Vernacular Names: Brazilian Gracile Opossum . Subspecies: : Subspecies Gracilinanus microtarsus subsp. microtarsus Wagner 1842 Subspecies Gracilinanus microtarsus subsp. guahybae Tate 1931 Distribution: SE Brazil . Conservation: IUCN – Lower Risk (nt). Discussion: Costa et al. (2003) detailed differences between G. agilis and G. microtarsus , two taxa that Gardner (1993) suggested could prove conspecific.