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Beta Mahatvaraj (1)

Even though the expected EOO of Glyptothorax trewavasae is large the species is assessed as Vulnerable because of its restricted area of occupancy and its presence in only five locations. The species is also very rare. Furthermore, deforestation, siltation and organic pollution can change the specific habitat requirement and are major threats to the species (IUCN 2010). Glyptothorax trewavasae is endemic to the Western Ghats of India (Dahanukar et al. 2004). It is known from Maharashtra and Karnataka. In Maharashtra it is known from Koyna valley and Yenna (Venna) valley (Hora 1938) and Koyna river near Patan (Jadhav et al. 2011). In Karnataka it is known from Shimoga (Hora 1938) and Kigga falls on Tunga river (Arunachalam 2000). This species is also expected to be present in the hill streams of areas between the known localities. The expected extent of occurrence (EOO) of this species will be around 40000 km2, however, as the species is restricted to hill streams with rapid water flow and is habitat specific, the area of occupancy of the fish may be hardly 2000 km2 (5% of EOO). Currently the species is known only from 5 localities and is therefore put in the vulnerable catagory (IUCN 2010). Description: Rayed dorsal fin inserted above posterier half of pectoral fin, origin nearer adipose than to end of snout, spine strong and smooth. Adipose dorsal fin base equal to that of dorsal. Pectoral fin not reaching pelvic fin, spine strong, serrated with 11 antrose teeth along inner margin and with retrorse teeth along outer margin. Colouration: Uniform light gray with pectoral, dorsal, adipose and caudal bases dark. Some portions of certain rays of dorsal, anal and pelvics black, distal portion of caudal fin dark tipped with lighter colour. Habitat: Inhabits mountain rapids.

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Sisoridae

Asia: Krishna river system in Western Ghats, India. Type locality: Yenna Valley, Satara dist., Maharashtra, India.

12.0cm. SL (4¾ins)

18-24°c (63-75°f.)

6.0-7.0.

Talwar, P.K. and A.G. Jhingran, 1991. Inland fishes of India and adjacent countries. Volume 2. A.A.Balkema, Rotterdam.
Jayaram; K.C. Catfishes of India, Narendera Publishing House. p.253.
Dahanukar, N. 2011. Glyptothorax trewavasae. The IUCN Red List of Threatened Species 2011.
Froese, R. and D. Pauly. Editors. 2019.FishBase. World Wide Web electronic publication. www.fishbase.org, ( 12/2019 )
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.