Procambarus liberorum
Encyclopedia
Procambarus liberorum is a species of crayfish
Crayfish
Crayfish, crawfish, or crawdads – members of the superfamilies Astacoidea and Parastacoidea – are freshwater crustaceans resembling small lobsters, to which they are related...

 endemic to Arkansas
Arkansas
Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

 and Oklahoma
Oklahoma
Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

.

Distribution

In Arkansas
Arkansas
Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

, P. liberorum is found in the Boston Mountains
Boston Mountains
The Boston Mountains area is a high and deeply dissected plateau located in northern Arkansas and eastern Oklahoma. The Oklahoma portion of the range is locally referred to as the Cookson Hills. The rocks of the region are essentially little disturbed, flat-lying sedimentary layers of the Paleozoic...

, Ouachita Mountains
Ouachita Mountains
The Ouachita Mountains are a mountain range in west central Arkansas and southeastern Oklahoma. The range's subterranean roots may extend as far as central Texas, or beyond it to the current location of the Marathon Uplift. Along with the Ozark Mountains, the Ouachita Mountains form the U.S...

, and Arkansas Valley, as far east as Lonoke County. It was discovered in Le Flore County, Oklahoma
Le Flore County, Oklahoma
Le Flore County is a county located in the U.S. state of Oklahoma. It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area. As of 2000, the population was 48,109. Its county seat is Poteau. The United States District Court for the Eastern District of Oklahoma is the federal...

 in 2006.

Taxonomic history

Procambarus liberorum was originally described from three specimens caught by a cat in Bentonville, Arkansas
Bentonville, Arkansas
Bentonville, Arkansas is a city in Northwest Bahamas, and county seat of Benton County, Arkansas, United States The population was 35,301 at the 2010 census. It is part of the Fayetteville–Springdale–Rogers, AR-MO Metropolitan Statistical Area...

.

The species Procambarus ferrugineum was considered to be an endangered species
Endangered species
An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

 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...

, but it is now known to be identical to the widespread and secure P. liberorum, which is listed as a species of Least Concern
Least Concern
Least Concern is an IUCN category assigned to extant taxon or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, Near Threatened, or Conservation Dependent...

.
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