Boophis arcanus

Subgenus: Boophis
family: Mantellidae
subfamily: Boophinae
Species Description: Glaw F, Koehler J, de la Riva I, Vieites DR, Vences M 2010 Integrative taxonomy of Malagasy treefrogs: combination of molecular genetics, bioacoustics and comparative morphology reveals twelve additional species of Boophis. Zootaxa 2382:1-82.
Conservation Status (definitions)
IUCN (Red List) Status Endangered (EN)
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Madagascar


View distribution map using BerkeleyMapper.


From the IUCN Red List Species Account:


Range Description

Boophis arcanus is known from the central east of Madagascar at its type locality, Mahakajy Private Reserve, and from a second locality near Berembi, along the road between Ranomafana and Ifanadiana at 577 m asl. It may also be present at other lowland sites within Ranomafana National Park (Glaw et al. 2010) and more broadly in the region (J. Riemann pers. comm. November 2014). Based on a conservative range spanning these two localities, its extent of occurrence has been estimated at 1,087 km2 and it is thought to occur in fewer than 5 threat-defined locations.

Habitat and Ecology

In Mahakajy, specimens were found at night sitting on leaves 1–2 m high in bushes at the edge of disturbed rainforest (Glaw et al. 2010). In Berembi, the species was found by a stream in gallery forest. Similar to congeners, it presumably breeds in streams by larval development.


This species is only known from 2 adult females collected at Mahakajy in 2004 and 2006 (Glaw et al. 2010). This cryptic species is extremely difficult to identify based on morphological characters, especially since only two specimens have been collected despite intensive searches during three visits to the type locality (Glaw et al. 2010). However, due to ongoing habitat degradation and loss, its population is suspected to be decreasing.

Population Trend


Major Threats

Likely threats outside the park in which it has been recorded include deforestation caused by small-scale forest clearance for charcoal, subsistence agriculture, and cattle pasture.

Conservation Actions

Conservation Actions
B. arcanus occurs in Mahakajy Private Reserve, a site receiving some protection, and the species may also be present at lowland sites within Ranomafana National Park (Glaw et al. 2010). Ranomafana National Park is presently well-managed, but is potentially at risk if political instability weakens enforcement there (M. Vences pers. comm. December 2010). 

Conservation Needed
Site and habitat protection is required through the maintenance and improvement of current management practices both in and outside of the protected areas in which it is found. 

Research Needed
Further research is required on the species' population size and distribution, life history and ecology, and the threats faced by the species.

Red List Status

Endangered (EN)


Listed as Endangered as this species has an extent of occurrence of 1,087 km2, is known from fewer than 5 threat-defined locations, and there is ongoing decline in the extent and quality of its habitat.

Taxonomic Notes

The first data on this species were possibly recorded by Andreone (1994), who noted a small brown Boophis from the Ranomafana area as B. miniatus. Glaw et al. (2001) gave further information on the corresponding voucher specimens from Ifanadiana, a locality not far from Mahakajy (Glaw et al. 2010).


IUCN SSC Amphibian Specialist Group 2015. Boophis arcanus. The IUCN Red List of Threatened Species 2015: e.T49381365A49381418. .Downloaded on 19 January 2019


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