''Palaemon antrorum'', also known as the Balcones cave shrimp and the Texas cave shrimp, is a species of

palaemonid Palaemonidae is a family of shrimp in the order Decapoda. Many species are carnivores that eat small invertebrates, and can be found in any aquatic habitat except the deep sea. One significant genus is '' Macrobrachium'', which contains commerci ...

shrimp A shrimp (: shrimp (American English, US) or shrimps (British English, UK)) is a crustacean with an elongated body and a primarily Aquatic locomotion, swimming mode of locomotion – typically Decapods belonging to the Caridea or Dendrobranchi ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

. It is listed as an

endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological ...

, and as a Species of Concern by the United States

Endangered Species Act The Endangered Species Act of 1973 (ESA; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting and conserving imperiled species. Designed to protect critically imperiled species from extinction as a "consequence of e ...

. The species' type locality is an

artesian well An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock or sediment known as an aquifer. When trapped water in an aquifer is surrounded by layers of Permeability (ea ...

on what is now the campus of

Texas State University–San Marcos Texas State University (TXST) is a public research university with its main campus in San Marcos, Texas, United States, and another campus in Round Rock. Since its establishment in 1899, the university has grown to be one of the largest univer ...

San Marcos, Texas San Marcos () is a city and the county seat of Hays County, Texas, United States. The city is a part of the Greater Austin, Greater Austin Metropolitan Area. San Marcos's limits extend into Caldwell County, Texas, Caldwell and Guadalupe County, T ...

. It has also been reported from

Edwards Aquifer The Edwards Aquifer is one of the most prolific artesian aquifers in the world. Located on the eastern edge of the Edwards Plateau in the U.S. state of Texas, it is the source of drinking water for two million people, and is the primary water su ...

west to

Uvalde County Uvalde County ( ; ) is a county located in the U.S. state of Texas. As of the 2020 census, its population was 24,564. Its county seat is Uvalde. The county was created in 1850 and organized in 1856. It is named for Juan de Ugalde, the Spanish ...

References

Palaemonidae Crustaceans of the United States Freshwater crustaceans of North America Crustaceans described in 1896 Taxonomy articles created by Polbot Cave shrimp {{Caridea-stub

See also

References