Monodelphis unistriatus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Monodelphis unistriatus
Species Authority: (Wagner, 1842)
Common Name(s):
English Single-striped Opossum, One-striped Opossum, One-striped Short-tailed Opossum
French Opossum-musaraigne à une raie
Monodelphis unistriata (Wagner, 1842)

Assessment Information [top]

Red List Category & Criteria: Critically Endangered D ver 3.1
Year Published: 2011
Date Assessed: 2011-06-30
Assessor(s): Flores, D. & Teta, P.
Reviewer(s): Solari, S. & Chiozza, F.
Listed as Critically Endangered (Possibly Extinct) because in spite of collecting efforts in southern Brazil and northeastern Argentina, no additional specimens of M. unistriatus are known to have been taken since 1899. It is possible that we are dealing with a recently extinct South American marsupial. Only two specimens have been collected with certainty and each comes from single localities almost 400 km apart (Gardner 2007).

1996 Vulnerable

Geographic Range [top]

Range Description: Known only from São Paulo State, Brazil and Provincía Misiones, Argentina (Gardner 2007).
Possibly extinct:
Argentina; Brazil
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Known only from two specimens(Gardner 2008); a single individual collected before 1842 (Emmons and Feer 1997) and one specimen from Argentina (Pine et al. in prep.). The loss of habitat will most probably caused a decline in the population.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Their activity is predominantly terrestrial and crepuscular. Habitat and behaviour is not known.
Systems: Terrestrial

Threats [top]

Major Threat(s): Habitat loss is a threat, however, the magnitude is unknown.

Conservation Actions [top]

Conservation Actions: Surveys are required to determine whether or not this species is still extant.

Citation: Flores, D. & Teta, P. 2011. Monodelphis unistriatus. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 02 September 2015.
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