This species is known from near the villages of El Berro and Xometla, south and south-east to the Volcán Pico de Orizaba, central Veracruz, Mexico, at 2,500-2,725m asl. Additionally, a single specimen has been provisionally assigned to this species from Puerto del Aire.
Habitat and Ecology
It is a terrestrial species that inhabits pine-oak forest, living under the bark of stumps or fallen logs, or within piles of wood chips and shavings. At Xometla, individuals were found in partially cut-over pine forest. It presumably reproduces by direct development.
This species was very common in the past, but has undergone massive declines. After some 15 years without a record, a single specimen was collected in 2000 near Coiyachapa Veracruz, en route to Pico de Orizaba; surveys undertaken at the same time at other known localities (such as El Berro) failed to locate the species.
The main threat to the species is habitat loss as a result of logging, expanding agriculture, and increasing tourist development.
It occurs in Parque Nacional Pico de Orizaba. There is a need for further survey work to establish the current population status of this species.
Red List Status
Critically Endangered (CR)
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2, the habitat is severely fragmented, and there is continuing decline in the extent and quality of its habitat, and in the number of mature individuals, in central Veracruz, Mexico.
Gabriela Parra-Olea, David Wake, James Hanken, Mario García-París 2008. Thorius spilogaster. The IUCN Red List of Threatened Species 2008: e.T59428A11940161. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T59428A11940161.en .Downloaded on 21 February 2019