Chacodelphys formosa 

Scope: Global

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Didelphimorphia Didelphidae

Scientific Name: Chacodelphys formosa
Species Authority: (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: Vulnerable B1ab(i,iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Teta, P. & de la Sancha, N.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
This species is considered to be Vulnerable due to its disjunct distribution (in remaining habitats) within a relatively small extent of occurrence (<20,000 kmĀ²) and an ongoing decline in populations due to encroaching agriculture. This species is known from less than 10 locations and is in need of further research as it may be more threatened than is currently known.

Geographic Range [top]

Range Description:Currently known only from northern Argentina, Chacodelphys formosa may be widely distributed in the Chaco and other adjacent Neotropical biomes (Voss et al. 2004). Teta et al. (2006) presents four localities, all in north central Argentina, constituting new records.
Countries occurrence:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is a rare species, being less common than Cryptonanus chacoensis, another small marsupial found in sympatry (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, and it was known only from northern Argentina (Voss et al. 2004). The new recorded localities of C. formosa suggests that this species may be endemic to the humid Chaco (Teta et al. 2006).

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, porpulations are increasingly fragmented. Further reseacrh is needed to establish the range and susseptibility of this species to numerous possible threats.

Citation: Teta, P. & de la Sancha, N. 2008. Chacodelphys formosa. The IUCN Red List of Threatened Species 2008: e.T136547A4308404. . Downloaded on 22 October 2016.
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