Accepted by J. Klimaszewski: 8 Dec. 2014; published: 19 Jan. 2015 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2015 Magnolia Press Zootaxa 3911 (2): 273–279 www.mapress.com/zootaxa/ Article 273 http://dx.doi.org/10.11646/zootaxa.3911.2.8 http://zoobank.org/urn:lsid:zoobank.org:pub:FBF334D6-B43D-4EF6-BB5E-D89BDF528048 Four new species of Cephennomicrus Reitter (Coleoptera, Staphylinidae, Scydmaeninae) from Malaysia PAWEŁ JAŁOSZYŃSKI Museum of Natural History, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland. E-mail: scydmaenus@yahoo.com Abstract Four new species of Cephennomicrus are described from Malaysia: C. curvidens sp. n., C. gentingensis sp. n. (both from the Genting Highlands, West Malaysia), C. santubongensis sp. n. and C. muluensis sp. n. (both from Sarawak, East Ma- laysia). Male genitalia of all new taxa are illustrated and diagnostic characters are discussed. Key words: Coleoptera, Staphylinidae, Scydmaeninae, Cephenniini, Cephennomicrus, new species, Oriental, Malaysia Introduction Cephennomicrus Reitter, 1907 is a relatively large genus of Cephenniini currently comprising 71 nominal species broadly distributed in the Afrotropical (South Africa, Congo, Tanzania, Madagascar, Mauritius, Seychelles, Reunion Island and Grand Comore Island) and Oriental regions (Sri Lanka, Thailand, Taiwan, subtropical China and Japan, West Malaysia and Sumatra), extending through the Philippines and Papua New Guinea to Australia (including Lord Howe Island), New Caledonia, Fiji and Samoa (Jałoszyński 2011a). Many undescribed species were seen by the author from various parts of East and South Asia, especially from the Sunda Islands and several from the Himalayas; in Australia, Cephennomicrus is also more speciose than so far recorded (Jałoszyński, unpublished obs.). A possibly broader distribution in other parts of Africa, Melanesia, Micronesia and Polynesia was suggested (Jałoszyński 2011a). Because their bodies rarely exceed 1 mm, species of Cephennomicrus are challenging to study, and a preliminary phylogenetic analysis of morphology suggested that this genus may not be monophyletic; at least two distinct groups (the Cephennomicrus nomurai group and Cephennomicrus pinguis group) may deserve placement in separate genera (Jałoszyński 2011a). The previously described diversity of structures, broad distribution and still inadequately known morphology of many species require comprehensive study before a phylogeny-based re- classification can be proposed. Some species described from only females contribute to this unsatisfactory state of knowledge, because the extremely diverse male genital characters and modifications of the head in some males may be important for reconstructing the evolution of this group of taxa. The Cephennomicrus of the Malay subregion are, surprisingly, poorly studied, and only two species are known from this area: C. simplex Jałoszyński & Nomura, 2008 (from West Malaysia) and C. fesumatranus Jałoszyński, 2010a (from Sumatra). Cephennomicrus raffrayi (Schaufuss, 1889) from Singapore and C. sumatranus (Franz, 1984) from Sumatra were recently transferred to Lathomicrus Jałoszyński and Cephennula Jałoszyński, respectively (Jałoszyński 2010a, 2011b). In the present paper four new species are described, two from the Malay Peninsula and two from Borneo. Material and methods Dry-mounted specimens were relaxed in warm water and dissected; aedeagi were dehydrated in isopropanol, transferred to xylene and mounted in Canada balsam. Habitus images were taken by a Nikon Coolpix 4500 camera