Rattus simalurensis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Muridae

Scientific Name: Rattus simalurensis (Miller, 1903)
Common Name(s):
English Simalur Archipelago Rat, Simalur Rat
Taxonomic Notes: The form simalurensis and its two synonyms were each listed as a separate subspecies of R. rattus by Chasen (1940), but simalurensis is distinct from R. rattus and in morphology represents larger-bodied island variants of R. tiomanicus (Musser 1986, Musser and Califia 1982, Musser and Heaney 1985); simalurensis, babi, and lasiae were included in R. tiomanicus by Corbet and Hill (1992).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(ii,iii) ver 3.1
Year Published: 2016
Date Assessed: 2016-07-13
Assessor(s): Clayton, E.
Reviewer(s): Amori, G.
Contributor(s): Aplin, K., Lunde, D.P. & Musser, G.
Rattus simalurensis is endemic to Indonesia. It is assessed as Endangered as the species has an extent of occurrence of approximately 3,900 km², it is known only from a few small islands, and it is believed to be undergoing continuing decline due to loss of habitat and competition with introduced Rattus.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is found on Simalur island and the nearby islands of Siumat, Lasia, and Babi (Musser and Carleton 2005).
Countries occurrence:
Additional data:
Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:3900
Number of Locations:0-5
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. It has not recently collected.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:There is little information on its habitat requirements. It is likely to be confined to forest and forest edge.
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): It may be affected by forest loss taking place on the islands, and likely by competition with introduced Rattus rattus and Rattus exulans.

Conservation Actions [top]

Conservation Actions: It is not known from any protected areas. This species is in need of further survey work to determine its current population status.

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Citation: Clayton, E. 2016. Rattus simalurensis (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T19362A115149340. . Downloaded on 26 September 2018.
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