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Hyperolius dintelmanni 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Hyperoliidae

Scientific Name: Hyperolius dintelmanni Lötters & Schmitz, 2004
Taxonomic Notes: While Amiet (2012) considers this species to be a synonym of Hyperolius tuberculatus which is followed by Frost (2016), we are following expert consensus (R. Bell and S. Lötters pers. comm. November 2016) that it should be maintained as a separate species pending further taxonomic study.

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2017
Date Assessed: 2016-11-17
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Portik, D., Bell, R. & Lötters, S.
Facilitator/Compiler(s): Hobin, L.
Justification:
Listed as Endangered because its extent of occurrence (EOO) is 105 km2, it occurs in fewer than five threat-defined locations, and there is continuing decline in the extent and quality of its habitat.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species was previously only known from the Edib Hills in the Bakossi Mountains in south-western Cameroon, between 1,100–1,250 m Asl. A recent survey in July 2013 of the Edib Hills discovered a substantial breeding subpopulation of this species located at a single crater pond, at 1,140 m Asl (D. Portik pers. comm. November 2016). It had not been detected at Mount Nlonako or Mt. Kupe previously, but several subpopulations have now been discovered in the lower elevation regions surrounding Mt. Kupe in 2013–2014 (D. Portik pers. comm. November 2016). Prior work at Mt. Kupe was conducted primarily at higher elevations ( >900 m Asl), whereas these surveys were conducted at elevations ranging from 470–1,010 m Asl. This species may occur at higher elevations on Mt. Kupe, and its lack of prior detection may be related to the scarcity of pond sites visited. The elevational range of this species at Mt. Kupe is substantially lower than that reported for the Edib Hills, suggesting it may have a broader elevational range than previously thought. Its EOO is 105 km2.
Countries occurrence:
Native:
Cameroon
Additional data:
Number of Locations:1-5
Lower elevation limit (metres):470
Upper elevation limit (metres):1250
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:During surveys in July 2013 a single individual was found, and in September 2014, three individuals were found at Mount Kupe. It is important to note that individuals from Edib and Mount Kupe are genetically indistinguishable, and that this geographic range extension is not the result of misidentification (Portik 2015). Due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Specimens at the Edib Hills have been found on the outer margins of patches of primary forest and at their breeding habitat that consisted of a small crater lake (D. Portik pers. comm. November 2016). Specimens were found sitting at night in grassy vegetation in areas with ferns, less than 1 m above the ground. In the survey from July 2013, numerous breeding adults were found on floating mats of vegetation the pond edge, engaged in calling behavior and amplexus, and juveniles were found emerging from the pond. Adult females and several juveniles were also found further inland along the forest trails. Specimens surrounding Mt. Kupe were found calling from emergent vegetation of a fish pond adjacent to a large stream within a populated village, and also found at a pond located in semi-disturbed habitat consisting of primary forest and cocoa plantation (D. Portik pers. comm. November 2016).

It has been observed breeding in pond systems in undisturbed and disturbed habitats, where the aquatic larvae complete their development.
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: There are no records of this species being utilized, although it is possible that tadpoles of this species in fishponds could be inadvertently harvested on Mount Kupe, depending on the size of the net used (D. Portik pers. comm. November 2016).

Threats [top]

Major Threat(s): Although it appears to be somewhat adaptable to habitat disturbance (since it has been found on the edges of forest), it occurs in an area where extensive forest clearance for smallholder farming is taking place and it is unlikely to persist in the face of such rampant habitat loss. Substantially greater numbers of breeding adults (~100) were found at the undisturbed crater lake in the Edib Hills, as compared to surveys around heavily modified habitat (4 individuals).

Conservation Actions [top]

Conservation Actions: Conservation Actions
This species does not occur in any protected areas. 

Conservation Needed
Its habitat in the Bakossi Mountains should be protected.

Research Needed
Further survey work is needed to determine the population status of this species. Further work across elevational ranges (400–1,200 m) throughout the Cameroonian Volcanic Line is necessary to clarify its range.

Citation: IUCN SSC Amphibian Specialist Group. 2017. Hyperolius dintelmanni. The IUCN Red List of Threatened Species 2017: e.T61797A105878022. . Downloaded on 21 November 2017.
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