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51. Single-striped Opossum

Monodelphis unistriata


The single-striped opossum is only known from two individuals collected from southeastern Brazil in 1821, and northeastern Argentina in 1899.

Multiple attempts to find the species through the 20th century failed, and the species remains mysterious. They are in the family Delphidae, which is the lineage of American opossums, the only non-Australian marsupials, which are known in the fossil record from 70-80 million years ago – before dinosaurs went extinct. Previously widespread, opossums went extinct through Europe and North America, being left only in South America by 10-20 million years ago. Around 3 million years ago opossums re-entered North America when the Isthmus of Panama reformed, connecting North and South America.

  • Order: Didelphimorphia
  • Family: Didelphidae
  • Population: Unknown
  • Trend: unknown

EDGE Score

EDGE Score: 5.36 (?)
ED Score: 12.23 (?)
GE / IUCN Red List (?)
Not Evaluated Data Deficient Least Concern Near Threatened Vulnerable Endangered Critically Endangered Extinct in the Wild Extinct


Only known from south-eastern Brazil and north-eastern Argentina.

Habitat and Ecology

Little is known of the habitat and ecology of this species, though based on other members of its genus, their activity is probably predominantly terrestrial.

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This wordcloud illustrates the threats facing this species. The size of each word indicates the extent of a species range that is affected by that threat (larger size means a greater area is affected). The colour of the word indicates how much that threat impacts the species (darker shades of red mean the threat is more severe).

Crops Logging

Threat wordcloud key:

Small area affected
Large area affected
Least severe
Most severe
Severity unknown
Source: The IUCN List of Threatened Species. Version 2017.1.
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