Endangered and Threatened Wildlife and Plants; Determination of Endangered Species Status for Six West Texas Aquatic Invertebrates

We, the U.S. Fish and Wildlife Service, determine the following six west Texas aquatic invertebrate species meet the definition of an endangered species under the Endangered Species Act of 1973: Phantom springsnail (Pyrgulopsis texana), Phantom tryonia (Tryonia cheatumi), diminutive amphipod (Gammarus hyalleloides), Diamond tryonia (Pseudotryonia adamantina), Gonzales tryonia (Tryonia circumstriata), and Pecos amphipod (Gammarus pecos). This final rule implements the Federal protections provided by the Endangered Species Act for these species. The effect of this regulation is to add these species to the lists of Endangered and Threatened Wildlife under the Endangered Species Act.