This species is currently known only from Mount Balabag, in the Mantalingajan mountain range, on the island of Palawan in the western Philippines. It might range more widely.
Habitat and Ecology
It has been found on the forest floor leaf-litter in lower montane forest, and probably breeds on land by direct development, like other members of its genus.
It is still known only from the type specimens, so there is no information regarding its population status.
The most important threats to this species include deforestation and habitat conversion to agriculture. The Mantalingajan mountain range is generally well protected but some areas of the range are subjected to disturbance through shifting agriculture and selective logging.
The effective protection of the remaining lower montane and lowland rainforest on Palawan is the most significant conservation measure required. Field surveys are needed to gather updated information on the range, population status and habitat requirements of this species.
Arvin Diesmos, Angel Alcala, Rafe Brown, Leticia Afuang, Genevieve Gee, Katie Hampson, Mae Leonida Diesmos, Aldrin Mallari, Perry Ong, Dondi Ubaldo, Baldwin Gutierrez 2004. Alcalus mariae. In: IUCN 2014