Abstract

In the present communication a new glyptosternine catfish Creteuchiloglanis nuthemuensis, is described from the Duphlokho River in West Kameng district, Arunachal Pradesh, India, which is a headwater of the Kameng River in the Brahmaputra basin. The new species is eminent from all closely related species of the genus by a distinct combination of the subsequent characteristics: presence of long pectoral fin extending over the pelvic fin origin and its reaching posterior end of dorsal fin base, body depth at anus 12–15.8% SL, predorsal length 34.5–35.9% SL, pelvic fin length 16–19.8% SL, adipose fin base length 28.3–33.3% SL, caudal peduncle depth 6.6–7.6% SL, absence of pinnate-like rays on the first branching ray’s anterior margin and second simple ray of anal fin, head depth 9.9–11.3% SL, and eye diameter 5.3–7.5% HL. This is the sixth Creteuchiloglanis species described from the Brahmaputra River basin.