The largest Laurentomantis, M 26-28 mm, F 34 mm. Dorsum very granular, brown with black markings. Ventrally brown with grey marbling. Males with tibial gland.
Similar species: G. ventrimaculatus differs by its larger tympanum (1/2 of eye diameter). Gephyromantis malagasius is smaller and has longer hindlimbs.
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Madagascar
Tsaratanana (Manarikoba forest, Antsahamanintsy), Montagne d’ Ambre, Nosy Be.
Observed at elevations between 300-1400 m (Andreone and Glaw 2008).
Life History, Abundance, Activity, and Special Behaviors
Habits: Males call at night in rainforest from the vegetation 50-150 cm above the ground.
Calls: Unharmonious notes, each consisting of 16-33 very widely spaced pulses. Males call at night in rainforest from the vegetation 50-150 cm above the ground.
Trends and Threats
This species is listed as endangered because its Extent of Occurrence is less than 5,000 km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat in northern Madagascar. It has been found in at least two protected areas in Madagascar: the Réserve Naturelle Intégrale du Tsaratanana and Parc National de Montagne d'Ambre (Andreone and Glaw 2008).
Possible reasons for amphibian decline
General habitat alteration and loss
Habitat modification from deforestation, or logging related activities
Intensified agriculture or grazing
Taken with permission from Glaw and Vences (2007).
Andreone, F. and Glaw, F. (2008). Gephyromantis horridus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 18 March 2009.
Glaw, F., and Vences, M. (2007). Field Guide to the Amphibians and Reptiles of Madagascar. Third Edition. Vences and Glaw Verlag, Köln.
Written by Miguel Vences and Frank Glaw (m.vences AT tu-bs.de), Assistant Professor and Curator of Vertebrates at the Institute for Biodiversity and Ecosystem Dynamics in the Zoological Museum at the University of Amsterdam
First submitted 2000-11-27
Edited by Catherine Aguilar (2009-04-07)
Species Account Citation: AmphibiaWeb 2009 Gephyromantis horridus <http://amphibiaweb.org/species/4604> University of California, Berkeley, CA, USA. Accessed Dec 10, 2018.
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Citation: AmphibiaWeb. 2018. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 10 Dec 2018.
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