Monodelphis unistriata Wagner, 1842:360

One-striped opossum, One-striped short-tailed opossum, Single-striped opossum



Taxonomy & Nomenclature

Synonym/s: Didelphys unistriata Wagner, 1842:360; Microdelphys unistriata Wagner, 1842:360; Peramys unistriata Wagner, 1842:360


Conservation Status


Last record: 9 April 1899

IUCN RedList status: Critically Endangered (Possibly Extinct)



São Paulo State, Brazil & Provincía Misiones, Argentina


Biology & Ecology




Only known from two specimens, collected in 1821 and 1899 (Pine et al., 2013). However, a third specimen may exist (Pine & Handley, 2008: 106).


Holotype: NMW B-1063 (skin of a male) (Voss, 2022:23)

Type locality: “Ytarare” (= Itararé, at 24.12° S, 49.33° W; ca. 740 m), São Paulo state, Brazil (Voss, 2022:23)






Original scientific description:

Wagner, J. A. (1842). Diagnosen neuer Arten brasilischer Säugthiere. Archiv für Naturgeschichte 8(1): 356-362.


Other references:

Brown, Barbara E. (2004). Atlas of New World Marsupials. Fieldiana (Zoology) 102: vii + 308. [p. 120-121]

Emmons, L. H. and Feer, F. (1997). Neotropical Rainforest Mammals: A Field Guide, Second edition. University of Chicago Press, Chicago, IL, USA.

Flores, D. and Teta, P. (2011). Monodelphis unistriata. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. ( Downloaded on 01 September 2012.

Freudenthal, M. and Martín-Suárez, E. (2013). Estimating body mass of fossil rodents. Scripta Geologica 145: 1-130. [0.055 kg min. mass estimate]

Gardner, A. L. (2007). Order Didelphimorphia. In: A. L. Gardner (ed.), Mammals of South America, pp. 669. University of Chicago Press, Chicago, USA.

Martin, Thomas E., Bennett, Gareth C., Fairbairn, Andrew J. and Mooers, A. Ø. (2023). ‘Lost’ taxa and their conservation implications. Animal Conservation 26(1): 14-24. [Appendix S2 (1617 taxa not seen >10 years); Appendix S3 (562 taxa not seen >50 years)]

Pavan, S. E. and Voss, Robert S. (2016). A revised subgeneric classification of short-tailed opossums (Didelphidae: Monodelphis). American Museum Novitates 3868: 1-44.

Pine, R. H. and Handley, C.O., Jr. (2008). Genus Monodelphis Burnett, 1830, pp. 82-107. In: Gardner, A.L. (Ed.), Mammals of South America, Vol.1. Marsupials, Xenarthrans, Shrews, and Bats. The University of Chicago Press, Chicago.

Pine, Ronald H., Flores, David A. and Bauer, Kurt. (2013). The second known specimen of Monodelphis unistriata (Wagner) (Mammalia: Didelphimorphia), with redescription of the species and phylogenetic analysis. Zootaxa 3640(3): 425-441.

Smith, F.A., Lyons, S.K., Morgan Ernest, S.K., Jones, K.E., Kauffman, D.M., Dayan, T., Marquet, P.A., Brown, J.H. & Haskell, J.P. 2003. Body mass of late Quaternary mammals. Ecology 84, Eco­logical Archives E084­093­metadata: 1-15.

Voss, Robert S. (2022). An annotated checklist of recent opossums (Mammalia: Didelphidae). Bulletin of the American Museum of Natural History 55: 1-74, 4 tbls.


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