Glyptothorax
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 Glyptothorax lonah
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Glyptothorax is a genus of catfishes (order Siluriformes) of the family Sisoridae. It is the most species-rich and widely distributed genus in the family with some 68 described species and new forms being discovered on a regular basis.
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[edit] Distribution
Glyptothorax species are distributed in the Black Sea basin, northern Turkey, south and east to the Yangtze River drainage in China and south throughout Indo-China to Java, Indonesia.[1] They are found in Asia Minor (in the Tigris and Euphrates River drainages) and southwards to Southeast Asia. The genus is very diverse in the Indian subcontinent.[2] Southeast Asian Glyptothorax species tend to have restricted distributions.[3]
[edit] Description
Glyptothorax is easily distinguished from other sisorids by having an adhesive apparatus on the thorax with grooves parallel or oblique to the longitudinal axis of the body, as opposed to grooves transverse to the longitudinal axis of body or the thoracic adhesive apparatus entirely absent.[1] The dorsal fin and pectoral fins have strong spines. The dorsal fin spine is smooth or serrate on the front edge and smooth or finely serrated on the posterior edge. The pectoral fin spine is serrated on the front edge. The head is small and depressed and the snout is conical. The body is elongate, from moderately to greatly depressed. The skin is either smooth or tuberculate. The eys are small and dorsally placed. The lips are thick, fleshy, and often papillate. The maxillary barbels have a well-developed membrane and a soft base. The gill openings are wide. The paired fins are plaited and modified to form an adhesive apparatus in some species of Glyptothorax.[1]
[edit] Ecology
Like other sisorids, these fish are rheophilic, that is they inhabit fast-flowing streams, where they are adapted to live by using the adhesive apparatus on the underside to attach themselves to rocks and prevent being washed away.[3]
[edit] Species
Species list according to Thomson, 2006.[1] Tentative and possible junior synonyms have notes next to their senior synonyms. Newer species are listed with a reference.
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[edit] Synonym notes
- a.^ G. alaknandi is tentatively considered a synonym of G. brevipinnis by Ng, 2005
- b.^ G. lineatum is tentatively considered a synonym of G. cavia by Ng, 2005
- c.^ G. dakpathari, G. modestum, G. stolickae tentatively considered synonyms of G. gracilis by Ng, 2005
- d.^ G. obscura is possibly a synonym of G. quadrioccelatus in Thomson, 2006
[edit] References
- ^ a b c d Thomson, Alfred W.; Page, Lawrence M. (2006). "Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes)" (PDF). Zootaxa 1345: 1–96.
- ^ a b c Ng, Heok Hee (2005). "Glyptothorax botius (Hamilton, 1822), a valid species of catfish (Teleostei: Sisoridae) from northeast India, with notes on the identity of G. telchitta (Hamilton, 1822)" (PDF). Zootaxa 930: 1–19.
- ^ a b c Ng, Heok Hee; Rachmatika, Ike (2005). "Glyptothorax exodon, a New Species of Rheophilic Catfish from Borneo (Teleostei: Sisoridae" (PDF). The Raffles Bulletin of Zoology (2): 251–255.
- ^ a b c Vishwanath, W.; Linthoingambi, I. (2007). "Fishes of the genus Glyptothorax Blyth (Teleostei: Sisoridae) from Manipur, India, with description of three new species". Zoos' Print Journal 22 (3): 2617–2626.
- ^ Ng, Heok Hee; Kottelat, M. (February 2008). "Glyptothorax rugimentum, a new species of catfish from Myanmar and Western Thailand (Teleostei: Sisoridae)" (PDF). The Raffles Bulletin of Zoology 56 (1): 129–134.
- ^ Vishwanath, W.; Linthoingambi, I. (May-Aug 2005). "A New Sisorid Catfish of the Genus Glyptothorax Blyth from Manipur, India". Journal of the Bombay Natural History Society 102 (2): 201–203.
