Coleoptera: Staphylinidae: Aleocharinae) Jong-Seok PARK and Kee-Jeong AHN

Entomological Research 36 (2006) 1–5

RESEARCHBlackwell Publishing Ltd PAPER Taxonomy of two oxypodine genera, Porocallus Sharp and Rhomphocallus Assing, in Korea (Coleoptera: Staphylinidae: Aleocharinae) Jong-Seok PARK and Kee-Jeong AHN

Department of Biology, Chungnam National University, Daejeon, Korea

Correspondence Abstract Kee-Jeong Ahn, Department of Biology, Chungnam National University, A taxonomic study of the genera Porocallus Sharp and Rhomphocallus Assing in Daejeon 305-764, Korea. Email: Korea is presented. The genus Rhomphocallus and two species, Rhomphocallus [email protected] princeps (Sharp) and Rhomphocallus maruyamai Assing, are reported for the ﬁrst time in Korea. Porocallus insignis Sharp is recorded for the ﬁrst time in South Received 21 September 2005; accepted 11 Korea. Diagnoses, illustrations of habitus and line drawings of diagnostic characters October 2005. are provided. doi: 10.1111/j.1748-5967.2006.00001.x Key words: Aleocharinae, Coleoptera, Korea, Porocallus, Rhomphocallus, Staphylinidae, taxonomy.

and slender, antennomere 11 distinctly longer than wide; Introduction ligula not bifid and rounded apically; and tarsal formula The tribe Oxypodini Thomson, 1859, containing 5-5-5. approximately 146 genera, is cosmopolitan and one of the In the present paper, we report the genus Rhomphocallus most systematically difficult groups of the Aleocharinae and two species, Rhomphocallus princeps (Sharp) and (Ashe 2001). It is poorly characterized, but can be recognized Rhomphocallus maruyamai Assing for the first time in by a combination of the following characters: tarsal formula Korea, and record Porocallus insignis Sharp for the first time 5-5-5, 4-5-5 or 4-4-4; antennae with 11 articles; mouthparts in South Korea. Given that Assing (2001, 2003) has described generalized; head without a neck in most individuals; and these genera and species in detail, we provide here diagnoses, median lobe without athetine bridge (Seevers 1978). and illustrations of habitus and line drawings of diagnostic The monotypic genus Porocallus Sharp is distributed only characters. in the east Paleartic region. Assing (2001) recorded Porocal- lus insignis for the first time in Korea. They are found under Materials and methods leaf litter. Members of the genus Porocallus are characterized Preparation of permanent microscopic slides was performed by the combination of the following characters: moderately using techniques described by Hanley and Ashe (2003). large size, densely punctate and dull; maxillary palpomere 3 Terminology for chaetotaxy and microstructures follows broad and truncate at the apex, apparently inverted triangle Sawada (1972). Materials examined in the present study are shape, terminal palpomere short and slender; ligula divided deposited in the Chungnam National University Insect into two lobes and lobes rounded; and tarsal formula 5-5-5. Collection, Daejeon, Korea (CNUIC). The genus Rhomphocallus Assing, which comprises three species, is restricted to the Palearctic region. Assing (2003) Genus Porocallus Sharp, 1888 (Korean name: erected the new genus based on Microglotta princeps Sharp U-dan-ban-nal-gae-sok) and described a new species (Rhomphocallus maruyamai Assing). Members of the genus Rhomphocallus are charac- Porocallus insignis Sharp, 1888 (Korean name: terized by the combination of the following characters: large U-dan-ban-nal-gae) size, body coarsely punctured and pubescent; antennae long (Figs 1,4,5,6,7)

J.-S. Park and K.-J. Ahn

Figures 1–3 1 Porocallus insignis; 2 Rhom- phocallus princeps; 3 Rhomphocallus maruyamai.

Porocallus insignis Sharp, 1888: 286; Fenyes, 1920: 344; Chungbuk Province, Korea, 8–9.v.1999, U.S. Hwang, H.J. Bernhauer and Scheerpeltz, 1926: 733; Assing, 2001: 215; Kim, sifting; Mount Paekam, Onjong-myeon, Uljin-gun, Pasnik, 2001: 227; Smetana, 2004: 486. Kyeongbuk Province, Korea, 12.vii.1999, U.S. Hwang, ex Diagnosis. Length 3.5–5.5 mm. Body black, sutural and leaf litter (1, on slide); 1, Mount Kariwangsan, posterior margin of elytra red, antennae and legs brownish Jeongsun-gun, Kangwon Province, Korea, 5–7.vii.1998, H.J. black. Antennae long, antennomere 1 longest and expanded, antennomere 3 longer than two and more than two times as long as wide, antennomeres 4–10 weakly rectangular. Head densely punctured and pubescent. Labrum (Fig. 4) transverse and rounded apically. Mandible pointed, asymmetrical, right mandible with internal tooth and serration between apical tip and internal tooth, apical part strongly curved inward. Maxilla with four palpomeres, palpomere 3 ﬂattened and expanded apically, palpomere 4 small, more or less triangular. Labium with ligula (Fig. 5) weakly biﬁd, one seta present on it; two medial setae distantly located, setal and basal pores present, pseudopores scattered medially and laterally. Labial palpus (Fig. 7) with three articles, palpomere 1 with 17 setae, palpomere 2 with eight setae and palpomere 3 with distal pore. Mentum (Fig. 6) transverse. Pronotum densely punctured and pubescent. See Assing (2001) for a detailed description. Material examined. 22, N34°92′50″, E127°09′70″, Mount Dubongsan, Bokrae-myeon, Boseong-gun, Jeonnam Province, Korea, 30.vii.2003, S.J. Park, D.H. Lee, sifting (1, on slide); 1, Eochi-ri, Daab-myeon, Gwangyang City, Jeonnam Province, Korea, 25.v.2000, H.J. Kim, M.J. Jeon, sifting; 1 , Eochi-ri, Daab-myeon, Gwangyang City, Figures 4–7 Porocallus insignis: 4 labrum, dorsal aspect; 5 labium, Jeonnam Province, Korea, 25.v.2000, K.J. Ahn, sifting; ventral aspect; 6 mentum, ventral aspect; 7 labial palpi, ventral 11, Cheondong Area, Mount Sobaeksan, Tangyang-gun, aspect. Scale bars, 0.1 mm.

Taxonomy of Korean Porocallus and Rhomphocallus

Figures 8–15 Labrum: 8 Rhomphocallus princeps, dorsal aspect; 9 Rhomphocallus maruyamai, dorsal aspect. Mentum: 10 R. princeps, ventral aspect; 11 P. maruyamai, ventral aspect. Labium: 12 R. princeps, ventral aspect; 13 R. maruyamai, ventral aspect. Labial palpi: 14 R. princeps, ventral aspect; 15 R. maruyamai, ventral aspect. Scale bars, 0.1 mm.

Lim, K.L. You, FIT; 1, Mount Kariwangsan, Jeongsun- III–VII impressed basally. See Assing (2003) for a detailed gun, Kangwon Province, Korea, 12–14.viii.1998, H.J. Lim, generic description. K.L. You, K.J. Ahn, sifting; 1, Ssangryong, Kangwon Province, Korea, 29.viii.1996, Y.B. Cho, ex near stream; Rhomphocallus princeps (Sharp, 1874) (Korean name: Mount Odaesan, Pyeongchang-gun, Kangwon Province, gom-bo-ban-nal-gae) Korea, 28–30.viii.1998, K.L. You, H.J. Lim, K.J. Ahn, (Figs 2, 8, 10, 12, 14, 16, 17) sifting (1, on slide); 1, Mount Oseosan, Sangdam-ri, Microglotta princeps Sharp, 1874: 6; Fenyes, 1920: 391; Kwangcheon-eup, Hongseong-gun, Chungnam Province, Bernhauer and Scheerpeltz, 1926: 773. Korea, 20.vi.1999, H.J. Kim, sifting; 1, Jangoksa Area, Rhomphocallus princeps: Assing, 2003: 165. Mount Chilgapsan, Cheongyang-gun, Chungnam Province, Haploglossa princeps: Smetana, 2004: 473. Korea, 3.vi.2000, U.S. Hwang, K.H. Jung, J.H. Song, sifting; Diagnosis. Length 4.5–5.5 mm. Body brown; antennae, 1, Gapsa, Mount Gyeryongsan, Gyeryong-myeon, Gongju marginal elytra, posterior tergites, and legs yellowish brown. City, Chungnam Province, Korea, 3.vi.2000, S.J. Park, M.S. Antenna long, antennomeres 1–3 similar in size, 4 weakly Kim, M.H. Hong, sifting. rectangular, 5 subquadrate, 6–10 transverse, 11 longest. Distribution. Korea, Japan, China, Russian Far East. Head densely punctured and pubescent. Labrum as in Figure 8. Mandible asymmetrical. Mentum as in Figure 10. Labium as in Figure 12. Galea wide, proximal sclerite Genus Rhomphocallus Assing, 2003 (Korean name: transverse. Labial palpi (Fig. 14) with three articles, Gom-bo-ban-nal-gae-sok) additional two setae present on opposite side of α-seta and β- Rhomphocallus Assing, 2003: 165. seta absent. Pronotum densely punctured and pubescent. Type species: Microglotta princeps Sharp, 1874. Abdominal tergite VIII of male as in Figure 16, and female Diagnosis. Length 4.5–5.5 mm. Body densely punctate as in Figure 17. See Assing (2003) for a detailed description. and dull. Antennae long and slender; antennomere 11 Material examined. 21, Dongseon-dong, Seongbuk-gu, longest. Maxillary palpomere 3 broad and truncate at the Seoul, Korea, 9.v.1988, Y.S. Kim, bait; 11, Dongsan-ri, apex, apparently inverted triangle, terminal palpomere short Jinbu-myoen, Pyeongchang-cun, Kangwon Province, Korea, and slender. Ligula divided into two lobes and rounded. 2.vii.1985, Y.S. Kim, bait; Dongseon-dong, Seongbuk-gu, Pronotum transverse, wider than head and widest in the Seoul City, Kyeongki Province, Korea, 24.v.1988, K.S. Jang, middle. Elytra wider than pronotum, bicolor and latero-basal bait (1, on slide); 1, Guam-ri, Sacheon City, Gyeongnam margin marginated. Tarsal formula 5-5-5. Abdominal tergites Province, Korea, 16.v.1986, K.S. Lee; 1, Piagol, Mount

J.-S. Park and K.-J. Ahn

Table 1 Differences between Rhomphocallus princeps and Rhom- phocallus maruyamai

Rhomphocallus Rhomphocallus princeps maruyamai

Body length 4.5–5.5 mm 4.5–4.8 mm Color (elytra) Sutural and posterior Yellowish brown margin red Antennomere 4 Weakly rectangular Subquadrate Labrum Figure 8 Figure 9 Mentum Figure 10 Figure 11 Labium Figure 12 Figure 13 Labial palpi Figure 14 Figure 15 Posterior margin of Distinctively Weakly emarginated abdominal tergite emarginated (Figs 18,19) VIII (Figs 16,17) Median lobe Figure 3 (Assing Figure 12 (Assing 2003) 2003) Spermatheca Figure 6 (Assing Figures 14 and 15 2003) (Assing 2003) Figures 16–19 Rhomphocallus princeps: 16 male tergite VIII, dorsal aspect; 17 female tergite VIII, dorsal aspect. Rhomphocallus maruyamai: 18 male tergite VIII, dorsal aspect; 19 female tergite VIII, dorsal aspect. Scale bars, 0.1 mm. Acknowledgments Jirisan, Gurye-gun, Jeonnam Province, Korea, 24.v.2000, We thank Volker Assing (Hanover, Germany) for providing H.J. Kim, M.J. Jeon, sifting. valuable reprints. We also thank Mr Seung-il Lee for taking Distribution. Korea, Japan. the habitus photos. This research was supported by a Korea Research Foundation Grant (KRF-2004-015-C00518) to Rhomphocallus maruyamai Assing, 2003 (Korean name: K.-J. Ahn. min-mu-nui-gom-bo-ban-nal-gae) (Figs 3, 9, 11, 13, 15, 18, 19) References Rhomphocallus maruyamai Assing, 2003: 165. Diagnosis. Length 4.5–4.8 mm. Body brown; antennae, Ashe JS (2001) Aleocharinae. In: Newton AF Jr, Thayer MK, marginal elytra, posterior tergites, and legs yellowish brown. Ashe JS, Chandler DS. 22. Staphylinidae Latreille, 1802. In: Antenna long, antennomeres 1–3 similar in size, 4 and 5 Thomas MC, Arnett RH, Jr (ed.) American Beetles, Volume 1, subquadrate, 6–10 transverse, 11 longest. Head densely Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia, punctured and pubescent. Labrum as in Figure 9. Mentum as pp. 272–418. CRC Press, Boca Raton, FL, USA. in Figure 11. Labium as in Figure 13. Galea wide, proximal Assing V (2001) On the systematics and distribution of Porocallus sclerite transverse. Labial palpi (Fig. 15) with three articles, Sharp, 1888 (Coleoptera: Staphylinidae, Aleocharinae, additional two setae present on opposite side of α-seta, and Oxypodini). Beitrage zur Entomologie 51: 215–221. Assing V (2003) A new genus of Oxypodini (Coleoptera, β-seta absent. Pronotum densely punctured and pubescent. Staphylinidae, Aleocharinae) from the Palaearctic region. Abdominal tergite VIII of male as in Figure 18, and female Bulletin of the National Science Museum of Tokyo (Series A: as in Figure 19. See Assing (2003) for a detailed description. Zoology) 29: 165–176. Material examined. Guam-ri, Sacheon City, Gyeongnam Bernhauer M, Scheerpeltz O (1926) Staphylinidae I. In: Junk W, Province, Korea, 16.v.1986, K.S. Lee (1 , on slide); Schenkling S (ed.) Coleopterorum Catalogus pars 82. W. Junk, Seoguipo Beach, Jeju Province, Korea, 12.xii.1984, K.S. Lee Berlin. (1 , on slide); 1 , Jinju City, Gyeongnam Province, Korea, Fenyes A (1920) Coleoptera: Fam. Staphylinidae, Subfam. 28.iv.1983, J.I. Kim; 1 , Jang-dong, Daejeon City, Aleocharinae. Genera Insectorum 173: 11–414. Chungnam Province, Korea, 26.xi.1996, Y.B. Cho. Hanley RS, Ashe JS (2003) Techniques for dissecting adult Distribution. Korea, Japan. aleocharine beetles (Coleoptera: Staphylinidae). Bulletin of Remarks. Rhomphocallus maruyamai can be distinguished Entomological Research 93: 11–18. from R. princeps by a weakly emarginated posterior margin Pasnik G (2001) The North Korean Aleocharinae (Coleoptera, of abdominal tergite VIII, aedeagal differences and Staphylinidae): diversity and biogeography. Acta Zoologica mouthpart structures (Table 1). Cracoviensia 44: 185–234.

4 Entomological Research 36 (2006) 1–5 © 2006 The Authors. Journal compilation © 2006 The Entomological Society of Korea and Blackwell Publishing Asia Pty Ltd Taxonomy of Korean Porocallus and Rhomphocallus

Sharp D (1874) The Staphylinidae of Japan. Transactions of the American Aleocharinae (Coleoptera, Staphylinidae). Fieldiana: Entomological Society of London 1674: 1–103. Zoology 71: 1–289. Sharp D (1888) The Staphylinidae of Japan. Annals and Magazine Smetana A (2004) Aleocharinae. In: Löbl I, Smetana A (ed.) of Natural History London, Der. 6, 2: 277–477. Catalogue of Palaearctic Coleoptera, Volume 2, Hydrophiloidea, Sawada K (1972) Methodological research in the taxonomy of Histeroidea, Staphylinoidea, pp. 353–295. Apollo Books, Aleocharinae. Contributions from the Biological Laboratory Stenstrup, Denmark. Kyoto University 24: 31–59. Thomson CG (1859) Skandinaviens Coleoptera, Synoptiskt Seevers CH (1978) A generic and tribal revision of the North Bearbetade. Tom I, pp. 1–55. Berlingska Boktryckeriet, Lund.