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Kryptopterus Piperatus, a New Species of Silurid Catfish (Teleostei: Siluridae) from Northern Sumatra

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Kryptopterus Piperatus, a New Species of Silurid Catfish (Teleostei: Siluridae) from Northern Sumatra 91 Ichthyol. Explor. Freshwaters, Vol. 15, No. 1, pp. 91-95, 2 figs., March 2004 © 2004 by Verlag Dr. Friedrich Pfeil, München, Germany – ISSN 0936-9902 Kryptopterus piperatus, a new species of silurid catfish (Teleostei: Siluridae) from northern Sumatra Heok Hee Ng*, Soetikno Wirjoatmodjo** and Renny K. Hadiaty** Kryptopterus piperatus, new species, is described from the Lembang River drainage in northern Sumatra. It belongs to the K. bicirrhis group of silurid catfishes and differs from all congeners in the group in having a unique combination of the following characters: head width 11.4-12.0 % SL; body depth at anus 22.3-24.3 % SL; eye diameter 20.3-25.3 % HL; maxillary barbels extending to anal origin; 49-53 anal-fin rays; 16-17 gill rakers; and pale brown coloration with scattered black spots on flanks. Introduction Material and methods Silurid catfishes of the genus Kryptopterus Bleek- Measurements were made point to point with er are found in inland waters throughout South- dial callipers and data recorded to tenths of a east Asia. The genus, as currently defined, is millimetre. Counts and measurements were made paraphyletic and consists of six distinct clades on the left side of specimens whenever possible. (Bornbusch, 1995). However, until greater reso- Subunits of the head are presented as propor- lution of the relationships of the various clades is tions of head length (HL). Head length and meas- obtained and more synapomorphies of the clades urements of body parts are given as proportions are identified, current nomenclature is followed of standard length (SL). Measurements follow in retaining all of the nominal species within those of Ng & Ng (1998). Institutional codes for Kryptopterus. While carrying out an ichthyologi- depositories of specimens: CMK, Collection of cal survey of the Alas River drainage in northern Maurice Kottelat, Cornol; MZB, Division of Zo- Sumatra, SW and RKH obtained specimens of a ology, Research Center for Biology, Cibinong; silurid catfish that belongs to an undescribed UMMZ, University of Michigan Museum of Zo- species, which is described here as K. piperatus. ology; ZRC, Zoological Reference Collection of the Raffles Museum of Biodiversity Research, National University of Singapore. * Fish Division, Museum of Zoology, University of Michigan, 1109 Geddes Avenue, Ann Arbor, Michigan 48109- 1079, USA. E-mail: [email protected] ** Division of Zoology, Research Center for Biology, Indonesian Institute of Sciences, Gedung Widyasatwaloka, Jalan Raya Jakarta km. 46, Cibinong 11961, Indonesia. Ichthyol. Explor. Freshwaters, Vol. 15, No. 1 The whole contribution can be Dieser Beitrag kann als purchased as PDF fi le. PDF-Datei erworben werden. 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