Advanced
Four Homalotine Species New to Korea (Coleoptera: Staphylinidae: Aleocharinae)
Four Homalotine Species New to Korea (Coleoptera: Staphylinidae: Aleocharinae)
Animal Systematics, Evolution and Diversity. 2014. Jul, 30(3): 191-195
Copyright © 2014, The Korean Society of Systematic Zoology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • Received : March 03, 2014
  • Accepted : July 07, 2014
  • Published : July 30, 2014
Download
PDF
e-PUB
PubReader
PPT
Export by style
Share
Article
Author
Metrics
Cited by
TagCloud
About the Authors
Yoon-Ho Kim
Kee-Jeong Ahn
kjahn@cnu.ac.kr
Abstract
Four homalotine species- Anomognathus armatus (Sharp), Heterota onorum Maruyama, Neosilusa ceylonica (Kraatz), and Silusa lanuginosa Sharp-and three genera- Anomognathus Solier, Neosilusa Cameron, Silusa Erichson-are identified for the first time in Korea. The tribe Homalotini can be distinguished from other related tribes by the combination of the following characters: tarsal formula 4-4-5; mandible with patch or rows of denticles in ventral molar region; base of medial setae of prementum very close together, setal insertions in contact in many, setae displaced one behind the other in some; medial pseudopore field of prementum very narrow in many. Habitus photographs, diagnoses, and illustrations of male genitalia of these four species are provided.
Keywords
INTRODUCTION
The tribe Homalotini Heer is one of the most species rich aleocharine tribes including more than 2300 described species in 152 genera worldwide ( Newton and Thayer, 2005 ; Ashe, 2007). Members of Homalotini can be distinguished from other related tribes by the combination of the following characters: tarsal formula 4-4-5; mandible with patch or rows of denticles in ventral molar region; base of medial setae of prementum very close together, setal insertions in contact in many, setae displaced one behind the other in some; medial pseudopore field of prementum very narrow in many ( Ashe, 1992 , 2001 ).
During our studies of Korean Homalotini, we identified four species new to Korea. In this paper, we report four species, Anomognathus armatus (Sharp), Heterota onorum Maruyama, Neosilusa ceylonica (Kraatz), and Silusa lanuginosa Sharp for the first time in Korea. Further, we provide habitus photographs, diagnoses, and illustrations of the male genitalia of these four species.
MATERIALS AND METHODS
For scanning electron microscopy (SEM), specimens were dissected in water by using fine insect pins. The dissected specimens were mounted on carbon tapes on slides, dried at 60℃ on a slide warmer for 24 h, and sputter-coated with Pt/Pd nanoparticles by using a sputter coater (Cressington 208 HR; Cressington Scientific Instruments Ltd., Watford, UK). Afterward, they were observed in a SEM (Hitachi S-4800; Hitachi High-Technologies Corporation, Tokyo, Japan). The terminology used here basically follows Sawada (1972) and Ashe (1984) .
RESULTS
  • Order ColeopteraLinnaeus, 1758
  • Family StaphylinidaeLatreille, 1802
  • Subfamily AleocharinaeFleming, 1821
  • Tribe HomalotiniHeer, 1839
  • 1*GenusAnomognathusSolier, 1849
  • 1*Anomognathus armatus(Sharp, 1888) (Figs. 1A,2A)
PPT Slide
Lager Image
Habitus. A, Anomognathus armatus, 1.9 mm; B, Heterota onorum, 2.8 mm; C, Neosilusa ceylonica, 2.0 mm; D, Silusa lanuginosa, 3.4 mm.
PPT Slide
Lager Image
Median lobe, lateral aspect. A, Anomognathus armatus; B, Hererota onorum; C, Neosilusa ceylonica; D, Silusa lanuginosa. Scale bar: B=0.1 mm.
Material examined. Korea: Chungnam Prov., Daejeon-si, Dong-gu, Secheon-dong, Mt. Sikjangsan, 36°19′11.34′′N, 127°29′59.7′′E, 170 m, 11 Apr 2010, Yoo IS, Lee SG, under bark (4 ex, 11♀ on slides); Gongju-si, Mt. Gyeryongsan, Dongwol, 36°19′39.0′′N, 127°15′46.7′′E, Ahn KJ, Choi SM, Park JS, ex FIT (2 ex); Jeonnam Prov., Hadong-gun, Hwagye-myeon, Ssanggyesa, 25 May 2000, Ahn KJ, under bark (13 ex).
Diagnosis. Body ( Fig. 1A ) length 1.7-2.1 mm. Body dorsoventrally strongly flattened, parallel-sided; reddish brown to dark brown, head and abdominal tergites VI-VIII dark brown. Head . Subquadrate, almost as wide as pronotum; antennomeres 4-10 transverse. Thorax . Pronotum more or less subquadrate about 1.1 times wider than long, surface pubescent, directed laterally on each side of midline; length ratio of elytra to pronotum 1.16. Genitalia . Spermatheca simple and round at base, duct more or less straight, tube with one distinct curve. Median lobe of aedeagus ( Fig. 2A ) bulbous at base, apical process slender and elongate, shorter than basal bulb. Secondary sexual characteristics . Male tergite VIII with five processes, outer two processes curved and pointed apically, median process largest and with two lateral teeth, processes of female tergite VIII shorter than male.
Distribution. Korea (South), Japan, Taiwan.
  • 2*GenusHeterotaMulsant and Rey, 1874
  • 3*Heterota onorumMaruyama, 2011(Figs. 1B,2B)
Material examined . Korea: Jeonnam Prov., Yeosu-si, Samsan- myeon, Geomun-ri, Isl. Geomundo, 34°01′31.4′′N, 127°18′48.8′′E, 7 m, 2 Jul 2011, Yoo IS, under decaying seaweeds on seashore (15 ex, 2♂♂1♀ on slide); Jeju Prov., Jeju-si, Oedoi-dong, 33°29′48.2′′N, 126°26′29.0′′E, 3 m, 9 Sep 2010, Kim TK, Yoo IS, under decaying seaweeds on pebble beach (6 ex, 1♂1♀ on slides).
Diagnosis. Body ( Fig. 1B ) length 2.6-2.9 mm. Body robust, subparallel-sided; brown to reddish brown, head and abdominal tergites VI-VII dark brown. Head . Antennomeres 4-5 elongate, 6 slightly elongate, 7-8 subquadrate, 9-10 slightly transverse. Thorax . Pronotum transverse about 1.35 times wider than long, widest at middle; width ratio of elytra to pronotum 1.33. Genitalia . Spermatheca simple and elongate at base, duct elongate and curved, apical part oblong oval. Median lobe of aedeagus ( Fig. 2B ) bulbous at base, apical process elongate and narrowed apically, shorter than basal bulb, flagellum short. Secondary sexual characteristics . Male sternite VIII postero-medially distinctly prolonged, female sternite VIII slightly pointed posteriorly.
Distribution. Korea (South), Japan.
Remarks. This coastal species is similar to Heterota plumbea (Waterhouse), but can be distinguished by more robust body, male tergite VIII not dentate posteriorly and short flagellum of median lobe.
  • 1*GenusNeosilusaCameron, 1920
  • 2*Neosilusa ceylonica(Kraatz) (Figs. 1C,2C)
Material examined . Korea: Jeonnam Prov., Sinan-gun, Heu-ksan-myeon, Hongdo-ri, Yangsanbong, Isl. Hongdo, 34°40′ 45.2′′N, 125°11′32.6′′E, 22 Aug 2006, Min HK coll., ex sifting (22♂♂♀♀, 2♂♂ on slides); Sinan-gun, Heuksanmyeon, Sosa-ri, Isl. Heuksando, 34°39′34.9′′N, 125°25′03.8′′E, 23 Aug 2006, Min HK coll., ex sifting (1 ex); Jeonbuk Prov., Jeongeup-si, Gamgok-myeon, Ogongjae (pond), 22 Jul-5 Aug 2004, col. Cho YB, bamboo forest by FIT (3 ex); Gyengnam Prov., Jingu-si, Gajoa-dong, Gyeongsang Univ., 29 Aug 2003, Lim CS, ex bait (7 ex); Chungnam Prov., Daejeon-si, Chungnam National Univ., 20 May 2002, Park JS, Choi JH, ex sifting (2 ex); Kongju-si, Kyerong-myeon, Jungjang-ri, Kyerongsan, Kapsa, 12 Aug 2000, Kim MH, ex mushroom (1 ex).
Diagnosis. Body ( Fig. 1C ) length 1.8-2.4 mm. Body slightly robust and rugose; surface punctuate; reddish brown, antennomeres 4-10 brown, abdomen strongly glossy, posteriorhalf of abdominal tergite V and tergite VI dark brown. Head . Eyes moderate in size, slightly shorter than postocular region; antennomere 4 elongate, 5 subquadrate, 6-10 incrassate toward apex. Thorax . Pronotum about 1.4 times wider than long, lateral margin distinctly emarginate on basal half, widest at apical third, three pit-like basal impressions present. Abdomen . Tergites III-IV deeply excavate. Genitalia . Spermatheca simple and rounded at base, duct with about 90°bent and tube sclerotized. Median lobe of aedeagus ( Fig. 2C ) bulbous at base, apical process elongate, slightly curved ventrally in lateral aspect, as long as basal bulb. Secondary sexual characteristics . Male tergite IV with two tubercles at middle; male tergite VII with six tubercles; posterior margin of male tergite VIII highly modified.
Distribution. Korea (South), China (Beijing, Guandong, Guizhou, Henan, Hongkong, Jiangsu, Sichuan, Yunnan, Zhejiang), Japan, Taiwan, India (Himachal Pradesh, Uttaranchal, Uttar Pradesh), Afrotropical, Australian Region.
Remarks. Neosilusa ceylonica is can be distinguished from other Neosilusa species by the following features: antennomere 5 subquadrate, male tergite IV with two tubercles, male tergite VII with six tubercles and structure of median lobe.
  • 1*Genus Silusa Erichson, 1837
  • 2*Silusa (Silusa) lanuginosa Sharp, 1888(Figs. 1D,2D)
Material examined. Korea: Chungbuk Prov., Yeongdong-gun, Sangcheon-myeon, Mulhan-ri, Mt. Minjujisan, 36°03′35.22′′N, 127°52′31.26′′E, 518 m, 10 Apr 2011, Kim YH, Kim YG, decaying persimmons (25 ex, 1♂1♀ on slides).
Diagnosis. Body ( Fig. 1D ) length about 3.4 mm. Body slightly robust, parallel-sided, glossy; surface punctuate; reddish brown to brown, head and abdomen dark brown. Head . Eyes moderate in size, shorter than postocular region; antennomere 4 subquadrate, 5-10 transverse. Thorax . Pronotum transverse, about 1.4 times wider than long, widest at apical fourth, round basal margin; elytra postero-lateral margin strongly sinuate. Abdomen . Tergites III-V deeply impressed. Genitalia . Spermatheca simple and round at base, duct with about 90° bent and tube twisted. Median lobe of aedeagus ( Fig. 2D ) bulbous at base, apical process slender and elongate, with some teeth on ventrally, distinctly shorter than basal bulb, genital process well developed, curved posteriorly, flagellum well sclerotized and developed. Secondary sexual characteristics . Postero- medial margin of male tergite VII with a distinct tubercle; male tergite VIII with seven short processes.
Distribution. Korea (South), China (Jilin), Japan.
Remarks. This species was collected from decaying persimmons at early spring in Korea.
Korean name: 호리납작바수염반날개속(신칭)
Korean name: 호리납작바수염반날개(신칭)
Korean name: 털보연안바수염반날개속(신칭)
Korean name: 큰털보연안바수염반날개(신칭)
Korean name: 구멍수염바수염반날개속(신칭)
Korean name: 구멍수염바수염반날개(신칭)
Korean name: 뾰족바수염반날개속(신칭)
Korean name: 뾰족바수염반날개(신칭)
Acknowledgements
This work was supported by a grant from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR No. 2014-02-001).
References
Ashe JS 1984 Generic revision of the subtribe Gyrophaenina (Coleoptera: Staphylinidae: Aleocharinae) with a review of the described subgenera and major features of evolution Quaestiones Entomologicae 20 129 - 349
Ashe JS 1992 Phylogeny and revision of genera of the subtribe Bolitocharina (Coleoptera: Staphylinidae: Aleocharinae) The University of Kansas Science Bulletin 54 335 - 406
Ashe JS , Newton AF , Thayer MK , Ashe JS , Chandler DS 2001 American beetles. Vol. 1. Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia CRC Press Boca Raton, FL Aleocharinae, Staphylinidae Latreille, 1802 295 - 324, 358-375, 397-418
Ashe JS 2007 Aleocharinae. James S. Ashe (1945-2005). Version 25 April 2007 [Internet]. Tree of Life http://tolweb.org/Aleocharinae/9777/2007.04.25
Assing V 2011 Six new species and additional records of Aleocharinae from China (Coleopetera: Staphylinidae: Aleocharinae) Linzer Biologische Beiträge 43 291 - 310
Cameron M 1920 X. New species of Staphylinidae from Singapore. Part III The Transactions of the Entomological Society of London 1920 212 - 284
Cameron M 1939 Fauna of British India including Ceylon and Burma. Coleoptera Staphylinidae Taylor and Francis London 1 - 691
Erichson WF 1837 Die Käfer der Mark Brandenburg. Erster Band, Erste Abtheilung Morin FH Berlin 1 - 384
Fenyes A 1914 Sauter’s Formosa-Ausbeute. Aleocharinae Archiv fur Naturgeschichte (A) 80 45 - 55
Fenyes A , Wytsman P 1918 Genera Insectorum. Fascicle 173a Louis Desmet-Verteneuil Bruxelles Coleoptera Fam. Staphylinidae subfam. Aleocharinae 1 - 110
Fleming J , Constable A 1821 Supplement to the fourth, fifth and sixth editions of the Encyclopaedia Britannica Edinburgh Insecta 41 - 56
Heer O 1839 Fauna Coleopterorum Helvetica Parks I. Orelii, Fuesslini et Sociorum Turici Fascicule II 145 - 360
Kraatz G 1857 Genera Aleocharinorum illustrata Linnaea Entomologica 11 1 - 43
Latreille PA 1802 Histoire naturelle, générale et particulière des crustacés et des insectes Tome troisieme. Familles naturelles et genres. F. Dufart Paris 13 - 468
Linnaeus C 1758 Systema naturae per regna tria naturae, secundum classes, ordines, genera species, cum characteribus, differentiis, synonymis, locis. Edito decima reformata Tomus I. Laurentii Salvii Stockholm 1 - 824
Maruyama M 2011 New record of the seashore genus Heterota (Coleoptera, Staphylinidae, Aleocharinae) from Japan, with description of a new species Esakia 50 97 - 104
Motschulsky Vde 1861 Essai d’un catalogue des insectes de l’île Ceylan Bulletin de la Société Impériale des Naturalistes de Moscou 34 95 - 155
Mulsant E , Rey C 1874 Histoire naturelle des coléoptères de France. Brévipennes. Aléochariens. (Suite). - Aléocharaires Deyrolle Paris 1 - 565
Newton AF , Thayer MK 2005 Catalog of higher taxa, genera, and subgenera of Staphyliniformia [Internet] Field Museum of Natural History Chicago, IL http: //www.fieldmuseum.org/peet_staph/db_1d.html
Pace R 1984 Aleocharinae delle Mascarene, parte I: tribù Myllaenini, Pronomaeini, Oligotini e Bolitocharini (Coleoptera, Staphylinidae) (XLV Contributo alla conoscenza delle Aleocharinae) Revue Suisse de Zoologie 91 3 - 36
Pace R 1993 Aleocharinae della Cina (Coleoptera, Staphylinidae) Bollettino del Museo Civico di Storia Naturale di Verona 17 69 - 126
Pace R 1998 Aleocharinae della Cina: Parte I (Coleoptera, Staphylinidae) Revue Suisse de Zoologie 105 139 - 220
Sawada K 1972 Methodological research in the taxonomy of Aleocharinae Contributions from the Biological Laboratory Kyoto University 24 31 - 59
Sharp DS 1888 The Staphylinidae of Japan The Annals and Magazine of Natural History 2 277 - 295, 369-387, 451-464
Smetana A , Löbl I , Smetana A 2004 Catalogue of Palaearctic Coleoptera. Vol. 2. Hydrophiloidea-Histeroidea- Staphylinoidea Apollo Books Stenstrup Family Staphylinidae: Aleocharinae 353 - 494
Solier AJJ , Gay C 1849 Historia Física y política de Chile segun documentos adquiridos en esta republica durante doce años de residencia en ella y publicada bajo los auspicios del supremo gobierno. Zoologia Tomo Cuarto Paris Orden III. Coleópteros 105 - 380, 414-511
Waterhouse TV 1858 [New taxa] Proceedings of the Royal Entomological Society of London 1858-1859 14 - 17