Red-listing is a widely used approach to globally evaluate the threats that affect species, according set of standardized criteria. The IUCN Red List Threatened Species world's most comprehensive inventory global conservation status species. It an international reference in this field, and powerful tool for endangered sites habitats. A number subterranean organisms various taxonomical groups ha...

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2.2 Population There are no credible published population estimates (Powell, 1996). The species is reported to be reduced, and it is believed that several local populations have been extirpated. (However, anecdotal records continue to be reported from throughout what is believed to be the original range). The species is thought to satisfy an IUCN criterion for vulnerable status (at least a 20% ...