Shell highly elongated, thin, slender; whorls well rounded; suture narrow, deeply incised. Sculpture smooth, only with growth lines and spiral lines, surface not glossy. Light brown, with dark brown patches or spiral band.

Description
Shell: Medium sized, solid but not thick; elongately turreted, cylindrical, mostly truncated with five to ten remaining regular, convex whorls. Suture narrow, accompanied by subsutural depression. Upper whorls smooth except for growth lines, last whorls sculptured by numerous fine spiral lines forming regular pattern with crossing growth lines. Surface not glossy; colour of periderm yellowish to brownish green or olive, often with broad, dark brown spiral band, occa¬sionally with dark axial flames at upper whorls. Shells often grey or black due to layer of mineral deposits. Aperture ovate with protracted base. Size: H = 23-44 mm, B = 10-16 mm.
Embryonic Shell: Conical, smooth with faint growth lines; up to 2.5 mm high, 2.0-2.5 whorls; average proportions: H = 1.8 mm,B=1.1 mm,HA = 0.21,BA = 0.41,DA = 0.66 (forn = 15).
Operculum: Slightly ovate, up to five fast in diameter increasing whorls, nucleus slightly eccentric.
Radula: Upper rim of rachidian slightly concave, lateral corners not excavated, lower rim rather straight, slightly convex; main cusp flanked by two or three smaller denticles on each side, glabella well rounded at the base, v-shaped, its lateral margins slightly concave. Lateral teeth with main cusp, flanked by two accessory cusps on each side tapering in size. Inner and outer marginal teeth with two cusps, outer cusp broad, rounded; inner cusp pointed, considerably smaller. Outer marginals with conspicuous hooked outer flange.

Similar to B. citrina from which B. dautzenbergiana is distinguished by its more elongated shell, eroded tip, dark brown spiral band. Both species can be discriminated by shell parameters, although not statistically significant

Myanmar, central, northern to eastern Thailand, Laos, Cambodia, Vietnam. Widespread and fairly common in most parts of the Indochinese Peninsula. Few more precise localities available, though. River systems of the Salween, and the Chao Praya, as well as some affluents of the Mekong, but not Mekong itself.