Batasio fluviatilis ( Day, 1888 )

Ikhwanuddin, Mat Esa Mohd, Amal, Mohammad Noor Azmai, Aziz, Azizul, Sepet, Johari, Talib, Abdullah, Ismail, Muhammad Faiz & Hashim, Nor Rasidah, 2017, Inventory of fishes in the upper Pelus River (Perak river basin, Perak, Malaysia), Check List 13 (4), pp. 315-325 : 322

Batasio fluviatilis ( Day, 1888)

Leiocassis fluviatilis Day 1888 a: 805

Mystus stigmaturus Fowler 1934a: 94 .

Mystus havmolleri Smith 1931: 24 .

Material examined. Table 1; Figure 4b.

This species is characterized by having 1 dorsal- fin spine, 7 soft dorsal-fin rays, 4 or 5 anal-fin spines, and 8 or 9 soft anal-fin rays. It can be distinguished from all congeners, except by B. merianiensis , by having an adult color pattern consisting of a dark oblique predorsal bar and dark spot on the lateral of the body, just ventral to the adipose-fin base. This fish occurs in rivers and streams with moderate to swift current and a predominantly rocky bottom; it is less often in slow-flowing streams with a muddy substrate ( Ng and Kottelat 2001).