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Breitensteinia hypselurus Ng & Seibert 1998
Identification: Breitensteinia hypselurus is long and slender with a long low adipose ridge but no adipose fin, tall
neural spines in the caudal vertebrae, a slender caudal peduncle (26% SL), a relatively large eye (5% head length), the gill
opening not extending above the pectoral fin base, 11-12 principal caudal rays, 6 branchiostegal rays, and 42 vertebrae. The
broad, depressed head is covered with small, indistinct tubercles. Tubercles on the body are arranged in 5-6 horizontal rows
on both sides. The anterior nostril is tubular, and the caudal fin has a straight posterior margin. The narrow occipital
process reaches the predorsal plate. The posterior edge of the pectoral spine is smooth. Body and head dark brown above with
scattered light brown spots, light brown to cream-colored below with few brown spots. Dark brown bands on fins. To 5 in.
(13 cm) total length.
Range: This species is found in the Kapuas River drainage in western Borneo.
Habitat: B. hypselurus is found among woody debris in current in small to medium-sized rivers.
Similar species: B. cessator and B. insignis have a serrated posterior edge on the pectoral spine, a longer caudal
peduncle (31-37%% SL), low neural spines in the caudal vertebrae, and 44-45 vertebrae.
Information from Ng, H. H. and D. J. Seibert. 1998. A revision of the akysid catfish genus Breitensteinia Steindachner with
descriptions of two new species. Journal of Fish Biology 53:645-657.
