Type Locality
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87 km east of Pontianak, 0°02’S, 110°07’E, stream, about 1 km up Sungai Tajan from Tajan, Kalimantan Barat, Borneo.
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Differentiation from similar species:
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the absence of of caudal transverse bars vs. presence; more anal rays (25-27, mode 27, vs. 23-26, mode 24-25); more subdorsal scales (5 1/2-7, mode 7, vs. 5); more lateral scales (28-30, mode 30, vs. 26-28, mode 27); smaller predorsal length (62.1-67% SL, vs. 67.3-70.3); larger body depth at dorsal-fin origin (28.7-32.8% SL, vs. 26.2-28.9); slightly longer pelvic fin (33.9-55.4% SL, vs. 33.8-46.7); longer dorsal-fin base (11.4-14.9% SL, vs. 8.7-12.1); smaller total length (12.8-15.1% SL, vs. 14.3-15.5); smaller orbit diameter (48-69% of postorbital length, vs. 57-68); smaller interorbital width (64-74% of postorbital length, vs. 70-76) (Ref. 30224). [102]
The absence of chin-bar (vs. presence in B. pugnax, B. prima and B. pulchra); presence of dark distal borders on anal and caudal fins (vs. absence in B. Pugnax, B. fusca, B. schalleri, B. prima and B. pulchra; absence of caudal transverse bars (vs. presence in B. pugnax and B. pulchra; more anal rays than B. fusca (25-27, vs. 24-25); fewer lateral scales than B. schalleri (28-30, vs. 31); more predorsal scales than B. schalleri (19-21, mode 21, vs. 17-19, mode 19); more postdorsal scales than B. prima (11-12, vs. 9-10); greater head length than B. fusca (51.3-54.3% predorsal length, vs. 47.2-49.4); smaller predorsal length than B. fusca and B. prima (62.1-67% SL, vs. 68.1-70.2); smaller postdorsal length than B. prima (21.9-23.4% SL, vs. 24.1-26.3); smaller preanal length than B. prima (48-51.5% SL, vs. 50.6-54.8); greater body depth than B. schalleri (28.7-32.8% SL, vs. 26.7-27.6); longer pelvic fins than B pugnax (filamentous tip reaching 9-18th anal ray, vs. 4-10th; 33.9-55.4% SL, vs. 26.6-43.8); longer anal-fin base than B. fusca and B. schalleri (51.1-54.5% SL, vs. 47.8-52); smaller orbit diameter than B. pugnax and B. pulchra (24.2-28.5% HL, vs. 27.9-38.5); smaller interorbital width than B. pugnax and B. pulchra (29.6-36.1% HL, vs. 32.4-53) [102]
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