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Data Series 243

In cooperation with the U.S. Fish and Wildlife Service

Spatial Data for Eurycea Salamander Habitats Associated With Three Aquifers in South-Central Texas

By Franklin T. Heitmuller and Brian D. Reece

Thumbnail of Figure 1 and link to Project Summary PDF (1.2 MB)

Project Summary PDF (1.2 MB)

Zipped CD files (6.7 MB)


Eurycea salamander taxa comprise 12 known species that inhabit springs and caves in south-central Texas. Many of these are threatened or endangered species, and some are found only at one location. A number of the neotenic salamanders might be at risk from habitat loss associated with declines in ground-water levels. Eurycea salamander habitats are associated with three aquifers in south-central Texas: (1) the Edwards-Trinity (Plateau) aquifer, (2) the Edwards (Balcones Fault Zone) aquifer, and (3) the Trinity aquifer. The Edwards (Balcones fault zone) aquifer is commonly separated into three segments: from southwest to northeast, the San Antonio segment, the Barton Springs segment, and the northern segment. The Trinity aquifer south of the Colorado River can be divided into three permeable zones, the upper, middle, and lower zone. The U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, developed this report (geodatabase) to aggregate the spatial data necessary to assess the potential effects of ground-water declines on known Eurycea habitat locations in south-central Texas. The geodatabase provides information about spring habitats, spring flow, cave habitats, aquifers, and projected water levels.



Purpose and Scope


Spatial Data



1. Map showing Eurycea salamander habitats in south-central Texas.

For additional information contact:
Director, Texas Water Science Center
U.S. Geological Survey
8027 Exchange Drive
Austin, Texas 78754-4733
World Wide Web:
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