Based on the best scientific and commercial data available, the U.S. Fish and Wildlife Service is listing seven freshwater mussels found in Central Texas under the Endangered Species Act and designating 1,577 river miles of critical habitat for the species in the Colorado, Guadalupe, Brazos and Trinity river basins.

The six species receiving an endangered listing are the Guadalupe fatmucketTexas fatmucketGuadalupe orbTexas pimplebackBalcones spike, and false spike, while the Texas fawnsfoot is receiving a threatened listing.