Schistura reticulata ( Vishwanath & Nebeshwar, 2004 )

Shangningam, Bungdon & Kosygin, Laishram, 2022, A new record of Schistura reticulata from Myanmar with a note on fish diversity of Yu River, Records of the Zoological Survey of India 122 (1), pp. 57-63 : 58-62

Schistura reticulata ( Vishwanath & Nebeshwar, 2004) ( Figure 2 )

( Neomacheilus vinciguerrae (non Hora, 1935): Menon, 1987: 134 (Chindwin basin, Manipur, India).

Schistura reticulate Vishwanath & Nebeshwar, 2004: 15 (4) 323-330, (type locality-Maklang, Lokchao and Wanze streams of Manipur, India, Chindwin Basin)

Material examined: 37 exs, 35.0- 64 mm SL, Myanmar, Sagaing region, Tamu District, Yu River near Tamu , 24˚13N 94˚19E, 21-22-xii-2018, coll. Shangningam (ZSI FF8051) .

Description: Body slightly depressed and compressed anteriorly, more compressed posteriorly. Body entirely covered with embedded scales except on belly in front of pelvic fins. In predorsal area, scales widely scattered. On caudal peduncle, scales patially overlapping. Lateral lines complete with 84-102 scales. Axillary pelvic lobe present. No marked adipose crest on caudal peduncle. Largest recorded size 64 mm SL

Dorsal fin with 3 simple and 8½ branched rays its distal margin straight. Pectoral fin with 1 simple and 10-11

branched rays, tip of fin situated between its base and pelvic-fin origin. Pelvic fin with 1 simple and 8 branched ray situated opposite vertical to the 3rd branched rays of dorsal fin. Anal fin with 3 simple and 5½ branched rays its longest ray not reaching caudal-fin base. Caudal fin forked with 8+7 branched rays.

Mouth semicircular, lips moderately thick, upper lip with a very small median incision, with some slightly marked median furrows. Lower lip with a deep median incision, median lobes with 5-6 well marked furrows and rest of lip plain. Processus dentiformis present, but not prominent. No median notch in upper jaw, inner rostral barbel not reaching corner of mouth, outer one just reaching corner of mouth.

Sexual dimorphism: Male with large suborbital flap. In females, ventral surface between pectoral fin rays having closely set minute tubercles.

Coloration: Body yellowish brown with 17-29 dark brown bars, bars in front ofdorsal fin thin, thicker behind dorsal fin. Interspace of bars ½ bars width anteriorly, gradually becoming as wide as bars on caudal peduncle. Some bars in front of dorsal-fin origin split vertically into two (or more) as they extend from back to sides, sometimes very close or fused with adjacent bars. Bars behind dorsal fin not divided. Dorsal surface of head and snout densely spotted or uniformly dark brown. Dorsal fin with a black spot at base of simple and first branched rays. Branched dorsal rays with 1-3 rows of dark spots,caudal fin with 2-3 irregular v-shaped rows of spots, pelvic and anal fins with black marks in middle.

Distribution: India: Manipur, Maklang, Lokchao and Wanze streams (Chindwin- Ayeyarwady drainage); Myanmar: Yu River, Sagaing region.

IUCN status: Endangered.

A new record of Schistura reticulata from Myanmar with a note on fish diversity of Yu River

Figures

Figure 2. Schistura reticulata, ZSI FF 8051, 64.0 mm SL, Myanmar, Sagaing region, Yu River.