Finelined Pocketbook Hamiota altilis. Rare. Endemic to the eastern reaches of Mobile Basin. Remnant populations are found in some tributaries of most major rivers within its distribution. Further taxonomic work may reveal this to be a species complex. Usually found in habitats with at least some current. Listed as endangered by the U.S. Fish and Wildlife Service. HIGH CONSERVATION CONCERN.
Southern Sandshell Hamiota australis. Rare. Endemic to Gulf Coast drainages. Found in Choctawhatchee, Escambia, and Yellow river systems usually in soft sediments with at least some current. Listed as endangered by the U.S. Fish and Wildlife Service on October 12, 2012. HIGHEST CONSERVATION CONCERN.
Orangenacre Mucket Hamiota perovalis. Rare. Endemic to western Mobile Basin. Found in the Tombigbee River system and some of its tributaries. Usually in habitats with at least moderate current. The orangenacre mucket is one of at least three species which produce "superconglutinates" to increase the likelihood of predatory fish receiving their glochicia. The contents of both marsupial gills are extruded simultaneously within a mucus jacket, and remain tethered to the female by a clear mucus cord. The cord may extend up to several feet in length. This remarkable phenomenon was discovered in 1993. HIGH CONSERVATION CONCERN. Listed as threatened by the U.S. Fish and Wildlife Service.
Shinyrayed Pocketbook Hamiota subangulata. Rare. Restricted to Chattahoochee and Chipola river systems. Only known remnant populations are found in Uchee Creek, Russell County, and Big Creek, Houston County. Listed as endangered by the U.S. Fish and Wildlife Service. HIGHEST CONSERVATION CONCERN.