Chacodelphys formosa 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Didelphimorphia Didelphidae

Scientific Name: Chacodelphys formosa (Shamel, 1930)
Taxonomic Notes: Gardner (1993) listed Marmosa formosa as a synonym of Gracilinanus agilis. Voss et al. (2004) re-evaluated the holotype and only known specimen of M. formosa and transferred the species to its own monotypic genus (Chacodelphys) (Pinto and Gardner 2004).

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2016
Date Assessed: 2016-06-28
Assessor(s): Teta, P., de la Sancha, N. & Flores, D.
Reviewer(s): Martin, G.M.
This species has a disjunct distribution (in remaining habitats) within a relatively small extent of occurrence (ca. 35,000 km²), and an ongoing decline in populations due to habitat modifications for agriculture. This species is known from less than 10 localities, and further research is needed as it may be more threatened than is currently known. Also, population has declined by a suspected 20-25% in the last three generations due to deforestation. The species nearly qualifies as Vulnerable under criterion A2c, therefore it is is considered to be Near Threatened.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Currently this species is known from only six localities in northern Argentina, Chacodelphys formosa may be widely distributed in the Chaco and other adjacent Neotropical biomes (Voss et al. 2004, Teta et al. 2006, Teta and Pardiñas 2007).
Countries occurrence:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No information is available on this species, which appears to be rare throughout its range (Teta et al. 2006).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Until 2004, the only available information about the habitat of Chacodelphys formosa was recorded by the collector of the holotype in 1920 (Voss et al. 2004). New records of C. formosa suggest that this species may be endemic to the humid Chaco (Teta et al. 2006). The species appears to be rare, and less common than the sympatric marsupial Cryptonanus chacoensis.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):1.7

Threats [top]

Major Threat(s): Deforestation and conversion of habitat for agriculture are the primary threats to this narrowly distributed species.

Conservation Actions [top]

Conservation Actions: This species occurs in several disjunct protected areas. However, populations are increasingly fragmented due to habitat conversion. Further research is needed to establish the species range, and susceptibility of this species to numerous threats.

Citation: Teta, P., de la Sancha, N. & Flores, D. 2016. Chacodelphys formosa. The IUCN Red List of Threatened Species 2016: e.T136547A22175485. . Downloaded on 15 October 2018.
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