Ptychidio

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Ptychidio
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Subfamily: Labeoninae
Genus: Ptychidio
G. S. Myers, 1930
Type species
Ptychidio jordani
Myers, 1930
Synonyms
  • VaricogobioLin, 1931

Ptychidio is a genus of cyprinid fish endemic to China.

Endemism Ecological state of being unique to a defined geographic location or habitat

Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution. An alternative term for a species that is endemic is precinctive, which applies to species that are restricted to a defined geographical area.

China Country in East Asia

China, officially the People's Republic of China (PRC), is a country in East Asia and the world's most populous country, with a population of around 1.404 billion. Covering approximately 9,600,000 square kilometers (3,700,000 sq mi), it is the third- or fourth-largest country by total area. Governed by the Communist Party of China, the state exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities, and the special administrative regions of Hong Kong and Macau.

Species

There are currently three recognized species in this genus: [1]

Ptychidio jordani, the ratmouth barbel, is a species of freshwater, ray-finned fish from the carp family, Cyprinidae. It is endemic to the Pearl River drainage system, purported records from Taiwan being considered extremely doubtful. It has been a highly sought species for fisheries but the population has declined to such an extent that it is now rarely caught and the damming of its native streams and rivers is now the chief threat to this species. This species is found in fast flowing, clear, streams and rivers flowing over gravel substrates, spawning in rapids. It is a demersal species which feeds on molluscs and algae. It is now a protected species in Yunnan but this little known species requires further research to determine how best to conserve it. It grows to a maximum size of 33 cm. The specific name jordani was applied by George S. Myers in honor of ichthyologist David Starr Jordan in appreciation of his friendship and kindness to Myers.

Dr. George Sprague Myers spent most of his career at Stanford University, where he was one of the leading American ichthyologists of the twentieth century. He served as the editor of Stanford Ichthyological Bulletin as well as president of the American Society of Ichthyologists and Herpetologists. Myers was also head of the Division of Fishes at the United States National Museum, and held a position as an ichthyologist for the United States Fish and Wildlife Service. He was also an advisor in fisheries and ichthyology to the Brazilian Government.

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References

  1. Froese, Rainer, and Daniel Pauly, eds. (2012). Species of Ptychidio in FishBase . October 2012 version.