|Scientific Name:||Hyperolius thomensis Bocage, 1886|
|Taxonomic Notes:||This species has previously been assigned to the genus Nesionixalus.|
|Red List Category & Criteria:||Endangered B1ab(iii) ver 3.1|
|Assessor(s):||Robert Drewes, Arne Schiøtz|
|Reviewer(s):||Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson and Neil Cox)|
Listed as Endangered because its Extent of Occurrence is less than 5,000km2, its range is severely fragmented, and the quality and extent of its forest habitat on São Tomé is declining.
|Range Description:||This species is endemic to São Tomé Island in São Tomé and Príncipe. It is restricted to primary forest remnants at elevations usually above 800m asl.|
Native:Sao Tomé and Principe
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||There is little information on the population status of this species, since it is notoriously difficult to find.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||It is restricted to primary rainforest, and is known to breed by larval development in tree holes. The same tree hole can be utilized by many individuals for breeding at different times. It has previously been reported from towns, but there is now significant doubt about these records.|
|Major Threat(s):||Little information is available on threats, though it is likely to be impacted by habitat loss for agriculture, livestock, wood extraction, and human settlements.|
|Conservation Actions:||A large portion of its range falls within the proposed 295km² Parc Naturel Obo.|
Drewes, R.C. 2002. Islands at the center of the world. California Wild: 8-19.
Drewes, R.C. and Stoelting, R.E. 2004. The California Academy of Sciences Gulf of Guinea Expedition (2001) II. Additions and corrections to our knowledge of the endemic amphibians of São Tomé and Príncipe. Proceedings of the California Academy of Sciences: 573-587.
Drewes, R.C. and Wilkinson, J.A. 2004. The California Academy of Sciences Gulf of Guinea Expedition (2001): The taxonomic status of the genus Nesionixalus Perret, 1976 (Anura: Hyperoliidae), treefrogs of São Tomé and Príncipe with comments on the genus Hyperolius. Proceedings of the California Academy of Sciences: 395-407.
IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 23 November 2004).
Loumont, C. 1992. Les amphibiens de Sao Tome et Principe: revision systematique, cris nuptiaux et caryotypes. Alytes: 37-62.
Perret, J.-L. 1988. Sur quelques genres d'Hyperoliidae (Anura) restes en question. Bulletin de la Société neuchâteloise des Sciences naturelles 111: 35-48.
Schiøtz, A. 1999. Treefrogs of Africa. Edition Chimaira, Frankfurt am Main.
|Citation:||Robert Drewes, Arne Schiøtz. 2004. Hyperolius thomensis. The IUCN Red List of Threatened Species 2004: e.T56289A11442549.Downloaded on 20 November 2017.|
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