This species is known from scattered localities in Thailand (Taylor 1962), Lao PDR and Viet Nam (A. Ohler pers. comm.), wholly within the range of Occidozyga martensii. It probably occurs more widely than current records suggest, especially in areas between known sites.
Habitat and Ecology
Animals fitting the description of O. magnapustulosus occur in seepages, puddles and other shallow waters along streams and rivers, where they also breed. It has also been recorded from disturbed habitats such as gardens.
Any population data on Occidozyga magnapustulosus, if a recognizable species, is drowned in the population data of the sympatric and abundant Occidozyga martensii.
Water pollution might be a threat to this species.
Animals fitting the description and reputed range of O. magnapustulosus occur within adequately protected areas (Pha Taem National Park, Mae Yom National Park, Phu Luang Wildlife Sanctuary and Phu Kradung National Park). A thorough taxonomic re-evaluation of O. magnapustulosus is needed.
This species is frequently considered to be a synonym of Occidozyga martensii. It is possibly a sub-adult stage of O. martensii (Taylor (1962) was uncertain of its status). Its placement in Occidozyga is debatable.
IUCN SSC Amphibian Specialist Group 2014. Occidozyga magnapustulosa. In: IUCN 2014