Amblycipitidae

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name = Torrent catfishes
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Siluriformes
superfamilia = Sisoroidea
familia = Amblycipitidae
familia_authority = Day, 1873
subdivision_ranks = Genera
subdivision = "Amblyceps"
"Liobagrus"
"Xiurenbagrus"

Amblycipitidae is a family of catfishes, commonly known as torrent catfishes. It includes three genera, "Amblyceps", "Liobagrus", and "Xiurenbagrus".

Taxonomy

Amblycipitidae is a monophyletic group containing three monophyletic genera, "Amblyceps", "Liobagrus", and "Xiurenbagrus".cite journal|title="Xiurenbagrus", a New Genus of Amblycipitid Catfishes (Teleostei: Siluriformes), and Phylogenetic Relationships among the Genera of Amblycipitidae|first=Xiaoping|last=Chen|coauthors=Lundberg, John G.|journal=Copeia|year=1995|issue=4|pages=780–800|doi=10.2307/1447027|volume=1995] Amblycipitidae is the most basal sisoroid family and is sister to a clade formed by the remaining families. The genera "Amblyceps" and "Liobagrus" are sister group pair that is, in turn, sister to "Xiurenbagrus".

Distribution and habitat

These kinds of fishes can be found in swift freshwater streams in southern and eastern Asia, including Pakistan across northern India to Malaysia, China, Korea, and Japan.cite book|title=Fishes of the World|last=Nelson|first=Joseph S.|publisher=John Wiley & Sons, Inc|year=2006|isbn=0-471-25031-7] "Amblyceps" are mainly distributed in India and the Malay Peninsula. "Liobagrus" fishes are distributed in the Yangtze River basin, Taiwan, Japan, and the Korea Peninsula. The species of the genus "Xiurenbagrus" are only distributed in the Pearl River basin.cite journal|title=A new species of amblycipitid catfish, "Xiurenbagrus gigas" (Teleostei: Siluriformes), from Guangxi, China|first=Yahui|last=Zhao|coauthors=Lan, Jiahu; Zhang, Chunguang|journal=Ichthyological Research|year=2004|volume=51|pages=228–232|doi=10.1007/s10228-004-0220-z]

Description

Fish of this family have their dorsal fin is covered by skin. An adipose fin is present, and is confluent with the caudal fin in some species. The dorsal fin base is short and the dorsal fin spine is weak. The anal fin base is short. There are four pairs of barbels. The lateral line is poorly developed or absent. Both "Amblyceps" and "Liobagrus" species grow to about 100 millimetres (3.94 in) SL. "Liobagrus" is more stoutly built than "Amblyceps", the nostrils are close together in "Amblyceps" and distinctly apart in "Liobagrus", and "Amblyceps" species have a cuplike flap above the pectoral fins that is absent in "Liobagrus". Also, "Amblyceps" have double-folded lips and fin margins pigmented differently from the background colour, while "Liobagrus" have single-folded lips and fin margins paler than the background colour.

References