Antrolana
Encyclopedia
Antrolana lira is a species of crustacean
in family Cirolanidae
, the only species in the genus Antrolana. It is an unpigmented troglobite
with no eyes, reaching a maximum length of 0.7 inches (1.8 cm).
A. lira is endemic to the Great Appalachian Valley
in Virginia
and West Virginia
, where it "swims freely through calcite
-saturated waters of deep karst
aquifer
s". Its range extends over 200 miles (321.9 km), from Lexington, Virginia
to Charles Town, West Virginia
.
Antrolana lira is listed as a vulnerable species
on the IUCN Red List
, and as a threatened species
under the United States Endangered Species Act
.
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...
in family Cirolanidae
Cirolanidae
Cirolanidae is a family of isopod crustaceans, including the following genera:*Aatolana Bruce, 1993*Annina Budde-Lund, 1908*Antrolana Bowman, 1964*Aphantolana Moore & Brusca, 2003*Arubolana Botosaneanu & Stock, 1979...
, the only species in the genus Antrolana. It is an unpigmented troglobite
Troglobite
Troglobites are small cave-dwelling animals that have adapted to their dark surroundings. Troglobite species include spiders, insects, fish and others. They live permanently underground and cannot survive outside the cave environment. Troglobite adaptations and characteristics include a heightened...
with no eyes, reaching a maximum length of 0.7 inches (1.8 cm).
A. lira is endemic to the Great Appalachian Valley
Great Appalachian Valley
The Great Valley, also called the Great Appalachian Valley or Great Valley Region, is one of the major landform features of eastern North America. It is a gigantic trough — a chain of valley lowlands — and the central feature of the Appalachian Mountain system...
in Virginia
Virginia
The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...
and West Virginia
West Virginia
West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...
, where it "swims freely through calcite
Calcite
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate . The other polymorphs are the minerals aragonite and vaterite. Aragonite will change to calcite at 380-470°C, and vaterite is even less stable.-Properties:...
-saturated waters of deep karst
KARST
Kilometer-square Area Radio Synthesis Telescope is a Chinese telescope project to which FAST is a forerunner. KARST is a set of large spherical reflectors on karst landforms, which are bowlshaped limestone sinkholes named after the Kras region in Slovenia and Northern Italy. It will consist of...
aquifer
Aquifer
An aquifer is a wet underground layer of water-bearing permeable rock or unconsolidated materials from which groundwater can be usefully extracted using a water well. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology...
s". Its range extends over 200 miles (321.9 km), from Lexington, Virginia
Lexington, Virginia
Lexington is an independent city within the confines of Rockbridge County in the Commonwealth of Virginia. The population was 7,042 in 2010. Lexington is about 55 minutes east of the West Virginia border and is about 50 miles north of Roanoke, Virginia. It was first settled in 1777.It is home to...
to Charles Town, West Virginia
Charles Town, West Virginia
Charles Town is a city in and the county seat of Jefferson County, West Virginia, United States. The population was 2,907 at the 2000 census. Due to its similar name, travelers have sometimes confused this city with the state's capital, Charleston.-History:...
.
Antrolana lira is listed as a vulnerable species
Vulnerable species
On 30 January 2010, the IUCN Red List of Threatened Species identified 9694 Vulnerable species, subspecies and varieties, stocks and sub-populations.-References:...
on the IUCN Red List
IUCN Red List
The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...
, and as a threatened species
Threatened species
Threatened species are any speciesg animals, plants, fungi, etc.) which are vulnerable to endangerment in the near future.The World Conservation Union is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories,...
under the United States Endangered Species Act
Endangered Species Act
The Endangered Species Act of 1973 is one of the dozens of United States environmental laws passed in the 1970s. Signed into law by President Richard Nixon on December 28, 1973, it was designed to protect critically imperiled species from extinction as a "consequence of economic growth and...
.