Acrochordonichthys rugosus ( Bleeker, 1846 )

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 : 321-322

Acrochordonichthys rugosus ( Bleeker, 1846)

Pimelodus rugosus Bleeker 1846: 11 .

Acrochordonichthys varius Popta 1904: 189 .

Material examined. Table 1.

This species was identified by having 1 dorsal- fin spine, 4 or 5 soft dorsal-fin rays; 8–10 soft anal-fin rays; 35–37 vertebrae; long nasal barbels 6.5–15.6% of HL; lateral margins of head steeply sloping; convex snout dorsally; adipose fin with angular posterior margin; and pectoral-fin spine with serrations on the posterior edge. Acrochordonichthys rugosus differs from A. falcifer by having the posterior margin of the adipose fin angularshaped (vs rounded) and from A. pachyderma by having a dark brown color pattern of body with light brown irregular patches (vs cream color pattern of body). This species inhabits clear, swiftly flowing forested streams and sandy or rocky bottoms and hides under submerged logs or rocks with some leaf litter in the swifter parts of the stream ( Ng and Ng 2001).