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Type: Article
Published: 2021-01-22
Page range: 411–423
Abstract views: 122
PDF downloaded: 18

A new species of Leptoplectus Casey from Ryukyu Islands, Japan, with comments on morphology of integumental structures in Euplectitae (Coleoptera, Staphylinidae, Pselaphinae)

Museum of Natural History, University of Wrocław, Sienkiewicza 21, 50-335 Wrocław, Poland.
Shûhei Nomura, Department of Zoology, National Museum of Nature and Science, Amakubo 4-1-1, Tsukuba-shi, Ibaraki, 305-0005 Japan.
Coleoptera Euplectitae new species Japan northeastern Asia Palaearctic


Leptoplectus kijimunaa Jałoszyński & Nomura, sp. n. is described, based on a series of specimens collected on Okinawa Island, Japan. Morphological structures of the new species are illustrated in detail and compared to known characters of all remaining 14 congeners. As the diagnosis of Leptoplectus remains unclear, character variability within known species is discussed. It is concluded that within Palaearctic region, the bilobed labrum is a reliable character to distinguish this genus from other Euplectini. The placement of Labroplectus Kurbatov, treated as incertae sedis within the tribe Trichonychini in the latest edition of the Catalogue of Palaearctic Coleoptera, is verified and it is concluded that it should be maintained in Euplectini. An identification key to genera of northeastern Asian Euplectini is given. We also comment on outdated and inaccurate morphological nomenclature still broadly used in descriptions of new Pselaphinae taxa.



  1. Aubé, C.N. (1833) Pselaphiorum monographia cum synonymia extricata. Magasin de Zoologie, 3, 1–72, pls. 78–94.

    Aubé, C. (1844) Révision de la famille des Psélaphiens. Annales de la Société Entomologique de France, Series 2, 2, 73–160, pl. 3.

    Besuchet, C. (1956) Un Euplectus nouveau de Bornéo (Col. Pselaphidae). Entomologist, 89, 88–90.

    Besuchet, C. (1974) 24. Familie: Pselaphidae. In: Freude, H., Harde, K.W. & Lohse, G.A. (Eds.), Die Käfer Mitteleuropas. Band 5. Staphylinidae II (Hypocyphtinae und Aleocharinae). Pselaphidae. Goecke & Evers, Krefeld, pp. 305–362.

    Besuchet, C. (1993) Les Coléoptères Psélaphides de l‘atoll Fangataufa. Bulletin de la Société Entomologique de France, 98 (4), 339–341.

    Beutel, R.G., & Leschen, A.B. (2016) Handbook of Zoology. Coleoptera, Beetles. Volume 1: Morphology and Systematics (Archostemata, Adephaga, Myxophaga, Polyphaga partim). 2nd Edition. De Gryter, Berlin and Boston, 684 pp.

    Casey, T.L. (1884) Contributions to the descriptive and systematic Coleopterology of North America. Parts I & II. Collins Printing House, Philadelphia, 124 pp., pl. 1. [Part I: pp. 1–60, pl. 1, Part II: pp. 61–124]

    Casey, T.L. (1886) Descriptive notices of North American Coleoptera, I. Bulletin of the California Academy of Sciences, 2 (6), 157–264, pl. 7.

    Casey, T.L. (1897) Coleopterological notices, VII. Annals of the New York Academy of Sciences, 9 (1), 285–684.

    Casey, T.L. (1908) Remarks on some new Pselaphidae. Canadian Entomologist, 40, 257–281.

    Coulon, G. (1989) Revision generique des Bythinoplectini Schaufuss, 1890 (=Pyxidicerini Raffray, 1903, syn. nov.) (Coleoptera, Pselaphidae, Faroninae). Memoires de la Societe Royale Belge d’Entomologie, 34, 1–282.

    Chandler, D.S. (2001) Biology, morphology and systematics of the ant-like litter beetles of Australia (Coleoptera: Staphylinidae: Pselaphinae). Memoirs on Entomology, International, 15, i–vii + 1–560.

    Grigarick, A.A. & Schuster, R.O. (1980) Discrimination of Genera of Euplectini of North and Central America (Coleoptera: Pselaphidae). Entomology. University of California Publications in Entomology, 87, 1–56, 79 pls.

    Jeannel, R. (1950) Coléoptères Psélaphides. Faune de France, 53, i–iii + 1–421.

    Jeannel, R. (1952) Psélaphides recueillis par N. Leleup au Congo Belge. IV.—Faune de l‘Itombwe et de la Forêt du Rugege. Annales du Musée Royal du Congo Belge Tervuren, Belgique, Serie 8° (Sciences Zoologiques), 11, 1–295.

    Kurbatov, S.A. (1991a) Beetles of the tribe Euplectini (Coleoptera, Pselaphidae) from the Soviet Far East. Communication 2. Zoologicheskii Zhurnal, 70 (7), 55–62. [in Russian, English summary]

    Kurbatov, S.A. (1991b) Beetles of the tribe Euplectini (Coleoptera, Pselaphidae) from the Kunashir Island. Communication 3. Zoologicheskii Zhurnal, 70 (10), 69–77. [in Russian, English summary]

    Kurbatov, S.A. (1991c) Beetles of the tribe Euplectini (Coleoptera, Pselaphidae) from the Soviet Far East. Communication 1. Zoologicheskii Zhurnal, Moscow, 70 (6), 88–97. [in Russian, English summary]

    Kurbatov, S.A. (1992a) Beetles of the tribe Euplectini (Coleoptera, Pselaphidae) from the Russian Far East. 4. Descriptions of new taxa from Primorye region and Kurile Islands. Zoologicheskii Zhurnal, 71 (6), 39–48. [in Russian, English summary]

    Kurbatov, S.A. (1992b) Euplectini nouveaux de l’Extrême-Orient de la Russie (Coleoptera, Pselaphidae). Russian Entomologocal Journal, 1 (2), 25–28.

    Lawrence, J.F. and Ślipiński, A. (2013) Australian Beetles. Morphology, Classification and Keys. CSIRO Publishing, Collingwood, 561 pp.

    Leach, W.E. (1817) The zoological miscellany: being descriptions of new, or interesting animals. Vol. 3. E. Nodder & Son, London, v + 151 pp., pls. 121–150.

    Löbl, I. (1975) Beitrag zur Kenntnis der Pselaphiden von Korea (Coleoptera). Annales historico-naturales Musei Nationalis Hungarici, 67, 113–118.

    Löbl, I. & Löbl, D. (2015) Catalogue of Palaearctic Coleoptera. Vol.2. Revised and Updated Edition. Hydrophiloidea – Staphylinoidea. E. J. Brill, Leiden, 1702 pp.

    Märkel, J.C.F. (1844) Beiträge zur Kenntnis der unter Ameisen lebenden Insekten. Zweites Stück. Zeitschrift für die Entomologie, 5, 193–271.

    Park, O. (1942) A study in Neotropical Pselaphidae. Northwestern University Studies in the Biological Sciences and Medicine, No. 1, i–x + 403, 21 pls.

    Park, O. (1952) A revisional study of Neotropical pselaphid beetles. Chicago Academy of Sciences Special Publications, No. 9 (Part 2), 53–150.

    Raffray, A. (1898) Notes sur les Psélaphides. Révision générique de la tribu des Euplectini. Descriptions d‘espèces nouvelles. Revue d’Entomologie, 17, 198–273.

    Raffray, A. (1903) Voyage de M. L. Biró dans les possessions allemandes de la Nouvelle-Guinée. Psélaphides. Annales Historico-Naturales Musei Nationalis Hungarici, 1 (1), 29–101, pls. 1–2.