U.S. Fish and Wildlife Service (USFWS). 12 February 2002. Endangered and threatened wildlife and plants; Listing Roswell Springsnail, Koster's tryonia, Pecos assiminea, and Noel's amphipod as endangered with critical habitat. Federal Register 67(29):6459-

• Tryonia kosteri
• Assiminea pecos
• Gammarus desperatus
• Pyrgulopsis roswellensis