Garra hexagonarostris, a new labeonine fish (Teleostei: Cyprinidae) from the Chindwin basin, Manipur, Northeast India, and a critical review on the taxonomic status of G. minimus, G. alticaputus, G. nigricauda, G. kimini, and G. tyao.

Garra hexagonarostris, a new member of the proboscis species group, is described from the Chakpi River of Chindwin basin in Manipur, India. The new species is distinguished by the following combination of characters: a prominent hexagon-shaped unilobed proboscis with five large-sized conical tubercles on anterior margin, and three or four medium-sized conical tubercles on anteroventral region; transverse lobe with 1335 small- to medium-sized conical tubercles; lateral surface of snout swollen with 818 small- to medium-sized conical tubercles; 3132 lateral-line scales including three pored scales on caudal fin; and a large arch-shaped black spot on each side of opercle, immediately anterior to upper angle of gill opening. The taxonomic status of several species of Garra from Arunachal Pradesh and Mizoram, is reviewed and accordingly Garra minimus is considered as a junior synonym of G.

Mustura daral, a new species of stone loach from Arunachal Pradesh, Northeast India (Teleostei: Nemacheilidae).

Mustura daral, new species, is described from the Siang River (Brahmaputra drainage) in Arunachal Pradesh, Northeast India. The new species is distinguished from its congeners by: 910 dark-brown saddles on dorsum, each continued down on flank forming regularly set and shaped dark-brown bars; two black blotches at caudal-fin base; caudal fin forked with 9+8 branched rays; lateral line complete; median notch in lower jaw absent; axillary pelvic lobe large; and suborbital flap in male with conspicuous tubercles along posterior rim.

A new species of stone loach of the genus Mustura (Teleostei: Nemacheilidae) from Chindwin River drainage, Manipur, north-eastern India.

Mustura taretensis, a new nemacheilid loach, is described from the Taret River, a tributary of the Yu River, Chindwin River drainage, Manipur, India. The new species is distinguished from all its congeners by a unique combination of the following characters: body with 1213 irregular dark-brown blotches or bars on flank, alternating with 1116 irregular dark-brown saddles on the back; dorsum of head with a distinctly visible rhomboid dark-brown mark encircling a pale oval area on the nape; dorsal fin with 9 or 10 branched rays; lateral line complete; a well-developed free posterior chamber of air bladder, the halves of air bladder capsules connected by a manubrium; poorly developed processus dentiformis; suborbital flap present in males; and body depth 12.816.

A new species of the genus Garra Hamilton (Teleostei: Cyprinidae) from Northeast India.

A new species of Garra with a rostral proboscis is described from the Barak River drainage in Manipur, India. Garra paratrilobata, new species, is distinguished from its congeners in having the combination of the following characters: a prominent trilobed proboscis, the median lobe with 5-7 uni- to tricuspid tubercles on its anterior margin and 4-6 minute tubercles on its anteroventral margin; lateral lobe of the proboscis with 3-4 minute tubercles; lateral surface of the snout lobular, with 6-9 tubercles; 33-34 lateral-line scales; and the rostral surface concave, creased and depressed.

Molecular phylogenetic analysis of genus Osteobrama Heckel, 1843 and discovery of Osteobrama serrata sp. nov. from North East India.

Genus Osteobrama Heckel is characterized by strongly compressed, fairly deep body with abdominal edge sharp and trenchant entirely or from the pelvic fin base to vent; anal fin long with 14-36 rays, of which 11-13 are branched rays. The fishes of this genus are distributed in Pakistan, India, Bangladesh, Burma, and Yunnan (China). Present study involve six Osteobrama species viz.