The Guahiba gracile opossum (Cryptonanus guahybae) is a species of opossum in the family Didelphidae.[2] 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.[1] The poorly studied species is presumed to inhabit subtropical forests, and thus to be threatened by deforestation.[1]
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.