Mustura, Kottelat, 2018

Rameshori, Yumnam, Chinglemba, Yengkhom, Darshan, Achom & Vishwanath, Waikhom, 2022, Mustura daral, a new species of stone loach from Arunachal Pradesh, Northeast India (Teleostei: Nemacheilidae), Zootaxa 5129 (2), pp. 285-294 : 292-293

Key to species of Mustura of the Eastern Himalayan region

1a. Body with bars continuous with saddles.................................................................... 2

1b. Body with bars and/or blotches alternating with saddles....................................................... 7

2a. Flank with 6–10 regular set and shaped bars................................................................. 3

2b. Flank with 11–23 irregularly set and shaped bars............................................................. 4

3a. Flank with 6–9 short regular bars; median notch present in lower jaw; female with suborbital slit............... M. shuensis

3b. Flank with 9–10 regular bars; median notch in lower jaw absent; female without suborbital slit.................. M. daral

4a. Branched caudal-fin rays 15............................................................................. 5

4b. Branched caudal-fin rays 16–17.......................................................................... 6

5a. Bar at caudal-fin base complete.............................................................. M. dikrongensis

5b. Bar at caudal-fin base dissociated.......................................................... M. chhimtuipuiensis

6a. Head mottled; W-shaped bar at caudal fin base................................................... M. walongensis

6b. Head plain; short bar at caudal-fin base, occupying medially.......................................... M. subhashi

7a. Second branched pectoral-fin ray with a distal filamentous extension.................................. M. harkishorei

7b. Second branched pectoral-fin ray without distal filamentous extension............................................ 8

8a. Branched dorsal-fin rays 8½............................................................................. 9

8b. Branched dorsal-fin rays 9½–10½....................................................................... 12

9a. Branched caudal-fin rays 15................................................................... M. tuivaiensis

9b. Branched caudal-fin rays 16–17......................................................................... 10

10a. Branched caudal-fin rays usually 17 (rarely 16); flank with 6–10 irregular set and shaped blotches or bars......... M. celata

10b. Branched caudal-fin rays 16; flank with 13–20 irregular set and shaped blotches and bars............................ 11

11a. Flank with 13–17 irregular set and shaped blotches and bars; lower lip with a median notch.............. M. chindwinensis

11b. Flank with 18–20 narrow and irregular set and shaped bars; lower lip without a median notch............ M. yunnaniloides

12a. Flank with 12–14 broken, irregular set and shaped bars and blotches; bar at caudal-fin base complete; caudal fin with irregular set and shaped rows of spots..................................................................... M. tigrina

12b. Flank with 9–13 irregular set and shaped blotches or bars; bar at caudal-fin base dissociated; caudal fin with 2-3 rows of Vshaped spots........................................................................................ 13

13a. Mouth strongly arched; lower lip with conspicuous triangular cushion; absence of a rhomboid shaped dark-brown mark on the nape....................................................................................... M. prashadi

13b. Mouth moderately arched; lower lip with an inconspicuous triangular cushion; presence of a rhomboid shaped dark-brown mark encircling a pale oval area on the nape....................................................... M. taretensis