IUCN threat status:

Endangered (EN)

Distribution

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Range Description

This species is endemic to the State of Texas, U.S.A. (NatureServe 2009), west of Houston (Johnson 2006). It is only known from two locations: the type locality: San Felipe spring in Del Rio city, Val Verde county, western Texas; and in 1934 it was collected from Phantom Lake, Reeves, Texas (Balmorhea spring system) (Illinois NHS collection, cited in NatureServe 2009). Both records are old, and there is no more current information available for this species. San Felipe spring and the associated spring run is located in a city park, and it is doubtful whether the species still exists there. The estimated extent of occurrence is no more than 4,000 km2 (mainly due to the fact that the two locations are seperated by around 300 km), and the area of occupancy is very small, although it is difficult to define this, as the two known localities are not very specific.

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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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