Clarias microspilus, a new walking catfish (Teleostei: Clariidae) from northern Sumatra, Indonesia

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H.H. Ng
R.K. Hadiaty


Clarias microspilus, a new species of walking catfish is described from the short coastal rivers draining the western face of the Leuser Mountain Range and debouching into the Indian Ocean in Nangroe Aceh Darussalam province, northern Sumatra, Indonesia. It can be distinguished from Southeast Asian congeners in having a combination of the following characters: distance between the tip of the occipital process and the base of the first dorsal-fin ray 6.5-9.2 % SL; body depth at anus 14.9-18.9 % SL; head width 18.6-21.7 % SL; head depth 12.9-16.0 % SL; interorbital distance 40.5-44.5 % HL; occipital process width 31.7-40.8% HL; 64-68 dorsal-fin rays; 51-56 anal-fin rays; anterior tip of frontal fontanel reaching line through middle of orbit; anterior margin of pectoral spine with 22-34 serrations and posterodorsal margin smooth.

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Author Biographies

H.H. Ng

Heok Hee Ng graduated with a PhD from the University of Michigan in 2006 and has been working on the taxonomy of Asian catfishes since 1994. Now at the Raffles Museum of Biodiversity Research in Singapore, his current research focus is on sisoroid taxonomy and systematics.

R.K. Hadiaty

Renny Hadiaty was awarded her bachelor degree from the University of General Soedirman at Central Java in 1985. She has been on the research staff of The Research Center for Biology since, working on Southeast Asian freshwater fish diversity. She has been involved in several collecting expeditions in Sumatra, Kalimantan, Sulawesi and Papua, and having described more than 20 fish species.