Kryptopterus hexapterus:

RMNH 6842, holotype, 112.0 mm SL; Borneo: Banjarmasin . BMNH 1863.12.4.73 (1), 157.2 mm SL; NMV 46511 (1), 162.7 mm SL; Sumatra: Palembang . UMMZ 155810 (1), 191.8 mm SL; Sumatra: mouth of the Rokan River at Bagan Siapiapi . ZRC 45833 (8), 146.1-184.8 mm SL; Borneo: Sarawak, Rajang River drainage, market at Sibu, 2º17'18.6"N 111º49'49.2"E.