''Rotundaria aurea'', the golden orb, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of freshwater mussel. It is native to the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, where it is found only in

Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...

. This species was moved from ''

Quadrula ''Quadrula'' is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae native to rivers of the American Midwest and mid-south. All have thick nacreous shells with well-developed hinge teeth, many also with external she ...

'' to ''Rotundaria'' based on genetic evidence in 2012.

References

External links

federalregister.gov: Texas-fatmucket/Golden orb — ''Quadrula aurea''

aurea Aurea, golden in Latin, may refer to: * Aurea (car), a former Italian automobile manufactured in Turin from 1921 to 1930 * Aurea (singer) (born 1987), Portuguese singer * Aurea Alexandrina, a kind of opiate or antidote * Áurea, a municipality in ...

Endemic fauna of the United States Natural history of Texas Bivalves described in 1859 {{Unionidae-stub