Lepilemur grewcockorum


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Lepilemur grewcockorum
Species Authority: Louis Jr., Engberg, Lei, Geng, Sommer, Randriamampionona, Randriamanana, Zaonarivelo <i>et al</i>., 2006
Common Name/s:
English Grewcock's Sportive Lemur
Lepilemur grewcocki Louis Jr., Engberg, Lei, Geng, Sommer, Randriamampionona, Randriamanana, Zaonarivelo et al., 2006
Lepilemur manasamody Craul, Zimmermann, Rasoloharijaona, Randrianambinina & Radespiel, 2007
Taxonomic Notes: Tattersall (2007) has cautioned that the Lepilemur species reported by Louis et al. (2006), all diagnosed exclusively on genetic distance and all allopatric, be treated with extreme caution until supporting data are forthcoming.

Zinner et al. (2007) examined conflicting results in the genetic analysis of sportive lemurs in north-west Madagascar, those within in the range of what once considered to be Lepilemur dorsalis. Since the type localities of L. dorsalis Gray, 1871 and L. grandidieri Forsyth Major, 1894, were both "Northwest Madagascar", the proper name of one or two of the new species from the region (sahamalazensis, grewcockorum, mittermeieri, tymlerachsonorum) could be either of these two. The true "dorsalis", as such, had not been identified, and no attempt has been made to identify grandidieri, formerly a junior synonym of dorsalis. Genetic analysis of the holotypes of dorsalis and grandidieri is needed to resolve this. Zinner et al. (2007) also indicated that L. manasamody, described by Craul et al. (2007), is probably a junior synonym of L. grewcockorum, as sampling sites were less than two km apart, with no evident geographic barrier.

The original latin species name is here emended from the original description following Hoffmann et al. (2009).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor/s: Hoffmann, M.
Reviewer/s: Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)
Listed as Data Deficient as this species is only recently described, its taxonomic status is unclear relative to other recently described lemurs in northwest Madagascar, and further information is required to determine its limits of distribution, population status and threats.

Geographic Range [top]

Range Description: Currently known from the Anjiamangirana region in north-western Madagascar. Louis et al. (2006) gave the range as south of the Mahajamba River and north of the Maevarano and Sofia River, which is presumably a lapsis for "north of the Mahajamba River and south of the Maevarano and Sofia River". Formerly, the sportive lemurs found in this part of Madagascar were thought to be L. edwardsi. More recently, Craul et al. (2007) have described L. otto from between the Mahajamba and the Sofia, making the Sofia River effectively the southerly limit of L. grewcockorum; Craul et al. (2007) also described the species L. manasamody from between the Sofia and Maeverano Rivers, but following Zinner et al. (2007) that species is here considered a synonym of L. grewcockorum. Clearly, the limits between L. edwardsi, L. otto, and L. sahamalazensis remain unclear.
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no information on the population status of this species. One of 15 new species of Lepilemur described in 2006.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: An inhabitant of dry deciduous forest.
Systems: Terrestrial

Threats [top]

Major Threat(s): Unknown, but habitat loss is presumably a threat.

Conservation Actions [top]

Conservation Actions: Listed on CITES Appendix I. Present in the Anjiamangirana Classified Forest (Louis et al. 2006). Further work is now urgently needed to clarify the distribution and taxonomic limits of the recently described Lepilemur species.
Citation: Hoffmann, M. 2008. Lepilemur grewcockorum. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <>. Downloaded on 18 April 2014.
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