This species is known from three localities in São Paulo State, Brazil: Victoria, São Sebastião Island, and Ubatuba Municipality. The extent of its occurrence on the mainland is not clear.
Habitat and Ecology
It is presumably a subterranean species, living in soil in forest. It is also assumed to be oviparous with terrestrial eggs that develop directly, and to not be dependent on water for breeding.
The population status of this species is unknown.
There is no information on threats to this species.
This species' range includes a few protected areas. It is in need of taxonomic review (Wilkinson pers. comm.).
Red List Status
Data Deficient (DD)
Listed as Data Deficient in view of continuing uncertainties as to its extent of occurrence, status and ecological requirements.
The taxonomic status of this species is unclear.
Ulisses Caramaschi, Miguel Trefaut Rodrigues, Mark Wilkinson 2004. Siphonops insulanus. The IUCN Red List of Threatened Species 2004: e.T59595A11957925. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T59595A11957925.en .Downloaded on 17 January 2019