福 井 大 学 地 域 環 境 研 究 教 育 セ ン タ ー 研 究 紀 要 「日本 海 地 域 の 自然 と環 境 」 No.23,63-67,2016

Discovery of a Second of the Subgenus Fusionodes of the Cephennodes (Coleoptera: Staphylinidae: Scydmaeninae) from Honshu, Japan

HidetoHoshina*

Introduction

The genus Cephennodes Reitter, 1883 belongs to the tribe Cephenniini of the subfamily Scydmaeninae of the family Staphylinidae (Newton & Franz, 1998; Grebennikov & Newton, 2009). In Japan, one species, Cephennodes japonicus (Sharp, 1886), was firstly recorded (Sharp, 1886; Csiki, 1919; O'Keefe & Li, 1998). Later some species of Cephennodes were added to the Japanese fauna. As a result, ten species of Cephennodes have been known to occur in Japan (Kurbatov, 1995; Jaloszytiski, 2003; Jaloszpiski & Hoshina, 2003; Hoshina & Kishimoto, 2004; Jaloszynski, 2005, 2007; Hoshina, 2012). In my field survey in 2016, I collected three specimens of Cephennodes from Fukui Pref., Honshu, Japan. My careful examination showed they belong to a new member of this genus. In this paper, I describe the new species under the name, Cephennodes otome Hoshina, sp. nov. In the palaearctic region, 76 species of Cephennodes have been recorded and most of them belong to subgenera Cehpennodes or Fusionodes (Schlke & Smetana, 2015). Cephennodes otome sp. nov. is a member of Fusionodes and a second Japanese species of that subgenus.

Materials and methods

All specimens used in this study were collected by sifting litter. All material examined was dissected, and the male genitalia were put in 5 % KOH for about 12 hours at room temperature. Drawings of male genitalia, antennae, and body were prepared using an imaging equipment of biological microscope. The holotype designated in this study is deposited in the collection of the Museum of Nature and Human Activities, Hyogo (MNHAH). Paratypes are preserved in Fukui University (FU).

Key Words: Cephennodes, Scydmaeninae, Staphylinidae, Coleoptera, Fukui Pref., Japan * Hideto Hoshina (Faculty of Education, Fukui University, Fukui City, 910-8507 Japan)

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Description

Cephennodes (Fusionodes) otome Hoshina, sp. nov. [Japanesename: Otome-munabiro-kokemushi] (Figs. 1-5)

Diagnosis. Cephennodes (Fusionodes) otome sp. nov. is a second Japanese species of the subgenus Fusionodes. Dorsum dark reddish brown and densely pubescent. Each elytron with a humeral oblique carina whose length is about 0.48 times as long as elytra. Measurement of holotype: Body 1.4 m in length; head 0.34 mm in width; pronotum 0.43mm in length, 0.68 mm in width; elytra 0.82 mm in length, 0.72 mm in width. Male and female. Coloration. Dorsum of body shining, almost concolorous and dark reddish brown; maxillary palpus light brown; antennae brownish; antennomere 1 dark brown, antennomeres 2-10 brown, and antennomere 11 a little lighter than antennomere 10; meso- and metaventrites reddish brown except for a black median carina of mesoventrite; abdominal ventrites brown; legs brown, except for light brown all tarsi and reddish brown hind coxae; pubescence of dorsum golden yellow. Body 1.2-1.4 mm in length, about 1.9 times as long as wide, densely and thinly pubescent on dorsum. Head without sexual dimorphism, and pubescent more sparsely than pronotum and elytra, and about 0.52 times as wide as pronotum; surface of head smooth; setal socket punctures very minute; vertex weakly and simply convex; eyes round, about 1.3 times as long as wide in dorsal view; antennae about 0.70 mm in length, and normal shape in the genus Cephennodes; antennomeres 1-8 and 11 each longer than wide; antennomere 9 and 10 wider than long; antennomere 11 slender-oval, about 1.6 times as long as wide (Fig. 2); relative lengths of antennomeres 2 to 11 as follows: 1.6: 1.0: 1.1: 1.1: 1.1: 1.5: 1.4: 1.2: 1.5: 3.4. Pronotum bearing dense and minute setal socket punctures and normal punctures, densely pubescent, almost smooth, wholly convex but relatively flat at humeri (outside of broken line in Fig. 1), about 1.5 times as wide as long, widest at about basal 1/3 of lateral margins (Fig. 1), feebly narrowed then towards base; length of pronotum about 0.52 times as long as that of elytra; width of pronotum about 0.92 times as long as that of elytra; posterior margin expanded posteriorly and weakly at the middle; basal two foveae strongly impressed and its interval between foveae about 0.75 times as long as the maximal width of pronotum (Fig. 1); lateral carinae narrow, and not separated from lateral margins of pronotum. Elytra about 1.2 times as long as wide, widest at about basal 1/3 (Fig. 1), almost smooth, and bearing dense and minute setal socket punctures, and densely pubescent as pronotum; humeral oblique carinae long and distinct, about 0.48 times as long as elytra (Fig. 1). Hind wings fully development. Legs without sexual dimorphism; hind coxae distant from each other about 1/3 of coxal width; all tibiae simply slender, feebly narrowed from about basal 1/3 or 2/5 position towards the base. Metaventrite pubescent, smooth, convex, and minutely punctate; abdominal ventrites densely pubescent and weakly microreticulate.

— 64 — Discoveryof a SecondSpecies of the SubgenusFusionodes of the GenusCephennodes (Coleoptera: Staphylinidae: Scydmaeninae) from Honshu,Japan

Male. Aedeagus relatively slender (Figs. 3-5); median lobe about 1.9 times as long as wide in ventral and dorsal views (Figs. 3 and 4), triangular at apex in lateral view (Fig. 5); parameres bearing a few apical setae, and fused to median lobe as other species of subgenus Fusionodes. Distribution. Japan: Honshu (Fukui Pref.). Type series. Holotype: a, Kaminegori, Obama City, Fukui Pref., Honshu, Japan, 11. vi. 2016, H. Hoshina leg. (MNHAH). Paratypes, y, 24. vii. 2016, same data as holotype except for the date (FU). Notes. The present new species is a second Japanese species of the subgenus Fusionodes. Cephennodes (Fusionodes) otome Hoshina, sp. nov. is similar to C. (F.) loebli Kurbatov, 1995 in appearance, but can be separated from it by having median lobe of aedeagus triangular at apex in lateral view (Fig. 5). In contrast, C. (F.) loebli has median lobe simply slender oval. Etymology.This specific name is derived from a Japanese word otome, which means girls.

List of Japanese species of the genus Cephennodes

Cephennodes (Cephennodes) araiorum (Jaloszyriski, 2003) Cephennodes (Cephennodes) japonicus (Sharp, 1886) Cephennodes (Cephennodes) mizunoi Hoshina et Kishimoto, 2004 Cephennodes (Cephennodes) moderatus (Kurbatov, 1995) Cephennodes (Cephennodes) pullatus (Kurbatov, 1995) Cephennodes (Cephennodes) torosus (Kurbatov, 1995) Cephennodes (Cephennodes) vafer Kurbatov, 1995 Cephennodes (Cephennodes) yonaguniensis Hoshina, 2012 Cephennodes (Fusionodes) loebli (Kurbatov, 1995) Cephennodes (Fusionodes) otome Hoshina, sp. nov. Cephennodes besucheti (Kurbatov, 1995) (uncertain subgeneric status)

Abstract

A new species of the subfamily Scydmaeninae, Cephennodes otome sp. nov., is described from Fukui Pref., Honshu, Japan. As a result of this study, the number of Japanese species of Cephennodes becomes eleven. C. otome sp. nov. is a second Japanese species of the subgenus Fusionodes. I give a list of Japanese species of the genus Cephennodes.

References

Csiki, E., 1919. Scydmaenidae. In: Schenkling, S. (ed.). Coleopterorum Catalogus, pars 12: 1- 106. W. Junk, Berlin. Grebennikov, V. V. & A. F. Newton, 2009. Good-bye Scydmaenidae, or why the -like stone should become megadiverse Staphylinidae sensu latissimo (Coleoptera). European Jopurnal of Entomology, 106: 275-301. Jaloszytiski, P., 2003. Chelonoidum araiorum sp. nov., an unusual species of the Cephenniini

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(Coleoptera, Scydmaenidae) from the intertidal zone of the Pacific coast of central Honshu, Japan. Bulletin of the National Science Museum, Tokyo, Series A (Zoology), 29: 225-228. Jaloszpiski, P., 2005. Redescription of Cephennodes japonicus (Sharp) (Coleoptera: Scydmaenidae). Genus, Wroclaw, 16: 325-329. Jaloszytiski, P., 2007. The Cephenniini of China. II. Cephennodes Reitter of southern provinces, with taxonomic notes on the Cephennodes-Chelonoidum complex (Coleoptera: Scydmaenidae). Genus, Wroclaw, 18: 7-101. Jaloszyfiski, P. & H. Hoshina, 2003. Notes in the distribution of Cephennodes vafer Kurbatov, 1995 (Coleoptera, Scydmaenidae) in the Mainland of Japan. Elytra, Tokyo, 31: 195-198. Hoshina, H., 2012. New record of the genus Cephennodes (Coleoptera, Staphylinidae, Scydmaeninae) from Yaeyama Group, the Ryukyus, Japan, with description of a new species. Japanese Journal of systematic Entomology, 18: 425-429. Hoshina, H. & T. Kishimoto, 2004. First record of the family Scydmaenidae (Coleoptera) from the Ogasawara Islands, Japan, with description of a new species. Memoirs of the Faculty of Education and Regional Studies, Fukui University, Series II (Natural Science), 56 (2): 1-7. Kurbatov, S. A., 1995. Sur les Euthiini et Cephenniini (Coleoptera, Scydmaenidae) de l'extreme-est de la Russie et du Japon. Revue suisse de Zoologie, 102: 943-959. Newton, A. F. & H. Franz, 1998. World catalog of the genera of Scydmaenidae (Coleoptera). Koleopterologische Rundschau, 68: 137-165. O'Keefe, S. T. & K.-J. Li, 1998. Review of the Scydmaenidae (Coleoptera) of eastern Asia, with particular reference to , and description of the first scydmaenid from Hainan Island, China. Journal of the New York Entomological Society, 106: 150-162. Sharp, D., 1886. The Scydmaenidae of Japan. Entomologist's Monthly Magazine, 23: 46-51.

— 66 — Discovery of a Second Species of the Subgenus Fusionodes of the Genus Cephennodes (Coleoptera: Staphylinidae: Scydmaeninae)from Honshu,Japan

Figs. 1-5. Cephennodes (Fusionodes) otome Hoshina, sp. nov. 1, body; 2, antenna; 3, aedeagus, ventral view; 4, ditto, dorsal view; 5, ditto, lateral view. Scale A: 1.0 mm for Fig. 1. Scale B: 0.5 mm for Fig. 2. Scale C: 0.5 mm for Figs. 3-5.