Monday, November 21, 2016

[Ichthyology • 2012] Puntigrus (Systomus) navjotsodhii • A New Cyprinid Fish from Central Kalimantan, Borneo

Puntigrus (Systomusnavjotsodhii  
(Tan, 2012)

 Systomus navjotsodhii: MZB 17198, holotype, 41.7 mm SL, life colour.
A, a pair near the rocky substratum; B, male near submerged river bank vegetation. In situ photographs in type location, a hill stream habitat (Aug.2007).

A deep-bodied tiger barb with broad black bars is described from hill stream habitats in the headwaters of the Katingan River in Central Kalimantan, Borneo. Systomus navjotsodhii differs from other tiger barbs in having four complete broad black bars and the deepest body (body depth at dorsal-fin origin 53.6–59.2 % SL). The species is named in memory of Navjot Sodhi.

Key words:  taxonomy, tiger barb, cypriniformes, Southeast Asia, biodiversity

Distribution. — Systomus navjotsodhii is currently only known from both the upper Katingan and Barito river basins in Central Kalimantan, Borneo (Fig. 4).

Etymology. — Named after the late Professor Navjot S. Sodhi (1962–2011), for his inputs to conservation and ecological research in Southeast Asia, also for his considerable contributions and services to the editorship of the Raffles Bulletin of Zoology (as Editor-in-Chief from 1996 to 2001, Associate Editor from 2001 to 2005, and Editorial Board member from 2006 to 2011)

Discussion. — Systomus navjotsodhii belongs to the group of tiger barbs with a rhomboidal body, which include S. anchisporus (Fig. 5A), S. partipentazona (Fig. 5B), S. pulcher (Fig. 5C), and S. tetrazona (Fig. 5D). These are unlike the tiger barbs with an elongated body form, viz. S. endecanalis, S. foerschi, S. hexazona, S. pentazona, and S. rhomboocellatus. This former (rhomboid) group possesses a unique colour pattern, consisting of four or five black bars, with a dorsal fin with black pigmentation; whereas the group with the elongate body has five or six black bars, with a hyaline dorsal fin. 

Heok Hui Tan. 2012. Systomus navjotsodhii, A New Cyprinid Fish from Central Kalimantan, Borneo.  THE RAFFLES BULLETIN OF ZOOLOGY. 25: 285–289.  

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