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Issue: Vol. 183 No. 1: 16 Apr. 2003
Type: Article
Published: 2003-04-18
DOI: 10.11646/zootaxa.183.1.1
Page range: 1–7
Abstract views: 37
PDF downloaded: 4

Acrochordonichthys gyrinus, a new species of akysid catfish (Teleostei: Siluriformes) from Thailand

Fisheries Museum Institute, Department of Fisheries, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
Fish Division, Museum of Zoology, University of Michigan, 1109 Geddes Avenue, Ann Arbor, Michigan 48109-1079, USA
Pisces Akysidae catfish Yom River Chao Phraya drainage

Abstract

Acrochordonichthys gyrinus, a new species of akysid catfish belonging to the A. ischnosoma species group, is described from the Chao Phraya River drainage in Thailand. It can be distinguished from congeners by a concave posterior margin of the pectoral fin and the unique combination of the following characteristics: head depth 9.8–11.4% SL; dorsal to adipose distance 7.4–8.6% SL; body depth at anus 8.3–10.5% SL; maximum width of humeral process 16.3% its length; and anterior margin of anal fin and posterior margin of adipose fin straight. This species represents the northernmost distribution of the genus.

References

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    Ng, H.H. & Ng, P.K.L. (2001) A revision of the akysid catfish genus Acrochordonichthys Bleeker. Journal of Fish Biology, 58, 386–418.

    Ng, H.H. & Tan, H.H. (2002) Redescription of Acrochordonichthys ischnosoma Bleeker, 1858, a poorly-known species of akysid catfish (Teleostei: Siluriformes) from Sumatra and Java. The Raffles Bulletin of Zoology, 50, 449–452.

    Vidthayanon, C., Karnasuta, J. & Nabhitabhata, J. (1998) Diversity of Freshwater Fishes in Thailand. Office of Environmental Policy and Planning, Bangkok, 102 pp.