The Guahiba gracile opossum (Cryptonanus guahybae) is a species of opossum in the family Didelphidae. It is endemic to southern Brazil, where it is known only from three islands, Guahiba, São Lourenço, and Taquara, in the state of Rio Grande do Sul. The poorly studied species is presumed to inhabit subtropical forests, and thus to be threatened by deforestation.
References
Tate, G.H.H. (1931). "Brief diagnoses of twenty-six apparently new forms of Marmosa (Marsupialia) from South America". American Museum Novitates (493): 1–14. hdl:2246/3835. Voss, R.S.; Lunde, D.P.; Jansa; S.A. (2005). "On the contents of Gracilinanus Gardner & Creighton, 1989, with the description of a previously unrecognized clade of small didelphid marsupials". American Museum Novitates (3482): 1–34. doi:10.1206/0003-0082(2005)482[0001:OTCOGG]2.0.CO;2. hdl:2246/5673. S2CID 84269504.



