Vol. 110 - Part III - Zoological Survey of India

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22 Rec. zool. Surv. IndiaFigure 2 : Photograph is showing the confluence of Siang River and its tributary Agari River near Borguli village in north-eastperipheral area of the sanctuary.Figure 3 : Photograph is showing the general topography and habitat of the fish at Jopong island inside the sanctuary area.
NATH, DAM & KUMAR : A new fish species of the genus Barilius (Cyprinidae : Rasborinae).........India 23Figure 4 : Indigenous method of the fishing in study area. Tribes of the area, mostly use bamboo made conical baskets (asshown in photo) for fish trapping in the minor rivers/ streams for livelihood.(5) Pectoral tip reaches the base of ventral fin. (6)Caudal fin unequal, lower longer than upper. (7) Barbelstotally absent. (8) Lateral line interrupted at the 35thscale. (9) Scales with oval shaped spot at the dorsalside and diamond shaped spots at its tip below thelateral line and lateral line scales with single large spotsand a few bilobed spots. (10) Dorsal fin inserted nearerto caudal base. (11) Two longitudinal bands giving a‘V’ shaped on each side behind gill opening. (12) Caudalfin with a prominent streak at the bifurcation of caudallobes.On account of the above mentioned specificcharacteristics, the species has therefore been describedas a new species of the Genus Barilius. However whiledescribing the new species, an attempt has been madefor providing the key to identification of the availablevalid species (Menon 1999) of the Genus Barilius inthe text.KEY TO THE SPECIES OF THE GENUS BARILIUS1. Lateral line complete, snout smooth. Barbelsmaybe present or absent ................................. (2)Lateral line incomplete, ceases at the 35th scale.Snout deeply humped. Barbels absent ..................................... Barilius arunachalensis. Sp. Nov2. Barbels present ................................................ (3)Barbels absent ............................................... (14)3. Barbels 2 pairs ................................................ (4)Barbels 1 pair ................................................ (10)4. Vertical bars on the body absent ..................................................... Barilius radiolatus (Gunther)Vertical bars on the body present ................... (5)5. Anal Fin short (A.ii.iii.7-8) ............................... (6)Anal Fin long (A.ii.iii.10-12) ............................ (7)6. Maxillary barbel longer than rostral pair. Twoblack spots at the base of lateral line ............................ Barilius bendelisis (Hamilton-Buchanan)Maxillary barbels shorter than rostral pair. Blackspots at the base of lateral line absent ............................... Barilius shacra (Hamilton-Buchanan)7. Vertical bars extends to lateral line. Mascular padat he base of pectoral. Pre-dorsal scales not lessthan 22 ............................................................. (8)
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Vol. 110 - Part III - Zoological Survey of India

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