Gracilinanus microtarsus

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	MAMMALIA	DIDELPHIMORPHIA	DIDELPHIDAE

Scientific Name:

Gracilinanus microtarsus

Species Authority

Wagner, 1842

Common Name/s:

English	–	Brazilian Gracile Mouse Opossum, Brazilian Gracile Opossum
French	–	Petit Opossum-souris Du Brésil

Assessment Information [top]

Red List Category & Criteria:

Least Concern ver 3.1

Year Assessed:

2008

Assessor/s

Brito, D., Astua de Moraes, D., Lew, D. & Soriano, P.

Evaluator/s:

Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)

Justification:
This species is listed as Least Concern in view of its tolerance of habitat modification, presumed large population, and because it is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.

History:

1996

–

Lower Risk/near threatened (Baillie and Groombridge 1996)

Geographic Range [top]

Range Description:	This species is known only from southeastern Brazil, and from Misiones province in Argentina (Davis, 1947; Massoia, 1980; Vieira, 1949). Costa et al. (2003) demonstrated that this species occurs north into Minas Gerais state. Brown (2004) provided records south of Porto Alegre in Rio Grande do Sul state. Gardner (2007) does not recognize the localities in Misiones (Argentina) or Porto Alegre (Brazil), and the range needs clarification.
Countries:	Native: Brazil Presence uncertain: Argentina
Range Map:	(click map to view full version)

Population [top]

Population:	Restricted range. Not as abundant as G. agilis, although it is not rare (L. Costa pers. comm.).
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Found in wet evergreen Atlantic coastal forest in eastern Brazil. G. microtarsus was regularly caught on the ground as well as in trees, in both virgin and second-growth forest, though its morphology suggests extensive arboreality. It will probably found be found to be confined to areas of moderate to high rainfall (Davis, 1947; Stallings, 1988; Tate, 1933).
Systems:	Terrestrial

Threats [top]

Major Threat(s):	No presumed major threats. There is extensive deforestation in parts of its range.

Major Threat(s):

No presumed major threats. There is extensive deforestation in parts of its range.

Conservation Actions [top]

Conservation Actions:	The species occurs in protected areas. More research is needed to define to true range of this species.

Conservation Actions:

The species occurs in protected areas. More research is needed to define to true range of this species.

Citation:	Brito, D., Astua de Moraes, D., Lew, D. & Soriano, P. 2008. Gracilinanus microtarsus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 22 November 2008.
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