Akysis pulvinatus, a new species of catfish (Siluriformes: Akysidae) from southern Thailand

Abstract

Akysis pulvinatus, new species, is described from southern Thailand. It can be distinguished from congeners in having a combination of: length of adipose-fin base 23.0-25.2% SL, body depth at anus 13.2-16.0% SL, caudal peduncle depth 9.4-10.3% SL, head length 27.6-29.8% SL, head width 21.9-25.1% SL, length of nasal barbel 13.9-57.5% HL, length of maxillary barbel 78.5-105.0% HL, smooth posterior edge of pectoral spine, gently forked caudal fin with lower lobe longer than upper, yellow snout, and rounded pale colored patches on body. A possible case of Müllerian mimicry with the syntopic Pseudobagarius leucorhynchus is mentioned and briefly discussed. Copyright © 2007 Magnolia Press.