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Bluehead shiner
The bluehead shiner (''Pteronotropis hubbsi'') is a species of fish in the carp family, Cyprinidae. It is a true minnow. It is endemic to the central United States, where it is found in Arkansas, Louisiana, Texas, and Oklahoma. It was also once known from Illinois.〔Ranvestel, A. W. and B. M. Burr. (Conservation Assessment for Bluehead Shiner (''Pteronotropis hubbsi''). ) USDA Forest Service, Eastern Region. June 15, 2002.〕
In 2014, the status changed from Data Deficient to Near Threatened. It is threatened by draining, filling, farming and flooding of backwater swamp habitat and overcollection for the aquarium trade.〔 NatureServe. 2014. (''Pteronotropis hubbsi'' ). (IUCN Red List of Threatened Species. Version 2014.3 ) Downloaded on 30 April 2015.〕
==Description==
This minnow grows up to about 60 millimeters in maximum length. It is a dusky reddish orange along the back with a lighter belly. The chin is black and the top of the head is blue with a green iridescence. The larger males have some iridescence on the dark dorsal fin. There is a broad, dark lateral stripe from the chin to the tail base. The mouth is upturned. The lateral line is incomplete.〔
This species is closely related to ''Pteronotropis welaka'', and the two form a monophyletic group.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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