Hypselobarbus pseudomussullah differs from H. mussullah in having 41-42 lateral-line scale rows (vs. 44), 12-13 pre-dorsal scale rows (vs. 14), 5.5-6 transverse scale rows (vs. 7.5), 30-31circumferential scale rows (vs. 36), 11-12 transverse breast scale rows (vs. 14), and pre-pelvic fin length 51.16-53.56 %SL (vs. 47.37 %SL) and rostral barbel length 6.54-10.93 %HL (vs. 18.19 %HL). It can be distinguished from H. dubius in having weaker dorsal spine (vs. strong), 12-13 pre-dorsal scale rows (vs. 14), and 39-44 pre-anal scale rows (vs. 34-38). It is distinguished from H. micropogon in having a weaker dorsal spine (vs. strong), 39-44 pre-anal scale rows (vs. 31-34) and 30-31 circumferential scale rows (vs. 26-29). It differs from H. periyarensis in having 12-13 pre-dorsal scale rows (vs. 17-18), 30-31 circumferential scale rows (vs. 32-34), and distance between occiput to dorsal-fin origin 22.93-27.05 %SL (vs. 30.12-34.75 %SL), distance between pectoral-fin insertion to anal-fin origin 43.48-49.24 %SL (vs. 53.12-57.68 %SL), post-dorsal length 47.91-58.42 %SL (vs. 31.88-39.66 %SL) and length of maxillary barbels 12.95-23.91 % HL (vs. 26.50-29.68 %HL). It can be separated from H. kurali in having 30-31 circumferential scale rows (vs. 32-33), and 11-12 transverse breast scales (vs. 21-23). It differs from H. curmuca in having two pairs of barbels (vs. single pair), 8-8.5 upper transverse scale rows (vs. 9.5-10), 30-31 circumferential scale rows (vs. 39-40), 18 circumpeduncular scale rows ( vs. 20-21), 12-13 pre-dorsal scale rows (vs.14), and 5.5-6 lower transverse scale rows (vs. 7.5-8). It is distinguished from H. kolus in having two pairs of barbels (vs. single pair), 8-8.5 upper transverse scale rows (vs. 9.5-10), 18 circumpeduncular scale rows (vs. 20-21), 39-44 pre-anal scale rows (vs. 34-37), and 30-31 circumferential scale rows (vs. 35-37) (Ref.112605).

Description: Dorsal-fin rays IV-9; anal-fin rays III-5; pelvic-fin rays II-9; and pectoral-fin rays I-14 (Ref. 112605).