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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
Korean Journal of Applied Entomology Vol.58 No.3 pp.229-231

A Species of Euplectitae (Coleoptera: Staphylinidae: Pselaphinae) New to Korea

Ji-Won Kang, Sun-Jae Park1, A-Young Kim1, Jong-Seok Park*
Department of Biology, Chungbuk National University, Cheongju 28644, Korea
1Animal Resources Division, National Institute of Biological Resources, Incheon 22689, Korea
Corresponding author:
August 7, 2019 August 22, 2019 August 24, 2019


A species of pselaphine beetles, Philoscotus rostralis Nomura, is reported in Korea for the first time. Illustrations of a habitus, diagnostic characters and distribution map are provided.

한국산 미기록 곤봉개미사돈 Philoscotus rostralis (딱정벌레목: 반날개과: 개미사돈아과)에 대한 보고

강 지원, 박 선재1, 김 아영1, 박 종석*
충북대학교 생물학과
1국립생물자원관 동물자원과


개미사돈아과의 미기록종인 Philoscotus rostralis Nomura를 한국에 처음으로 보고한다. 정확한 동정을 위해 외형과 진단형질의 사진과 분포 지도를 함께 제공한다.

    The supertribe Euplectitae includes 8 tribes and 385 genera in the world (Bouchard et al., 2011), but only single genus and species, Philoscotus coreanusNomura and Lee, 1993, is recorded in Korea. The genus Philoscotus Sawada may be separated from other Euplectitae genera by narrowed head and prothorax, well-developed paratergites, and extremely reduced or absent female eyes and hind wings. This genus is similar externally with the genus Acetalius, but it can be easily distinguished by having paratergites. In this paper, Philoscotus rostralis Nomura is recorded in Korea for the first time. Illustrations of a habitus, diagnostic characters and distribution map are provided.

    Materials and Methods

    Thirty specimens were examined from the Chungbuk National University Insect Collection (CBNUIC), Cheongju-si, Chungbuk-do, South Korea, and the Chungnam National University Insect Collection (CNUIC), Daejeon, South Korea (indicated parenthetically). The picture of habitus and diagnostic characters were observed by LEICA M80 microscope and DM1000 LED optical microscope, respectively. Images were taken using Las V4.12 and Zerene Stacker software to take multi-focus images. The map is created from SimpleMappr and was subsequently modified to mark localities.

    Systematic accounts

    Genus PhiloscotusK. Sawada, 1957 옆배개미사돈속

    Type species Philoscotus longulusK. Sawada, 1957

    TyphlacetaliusJeannel, 1959: 17. Type species Typhlacetalius coiffaitiJeannel, 1959 (= Philoscotus brevisK. Sawada, 1957)

    Philoscotus rostralisNomura, 1988 긴턱옆배개미사돈(신칭) (Figs. 1, 2)

    Philoscotus rostralisNomura, 1988: 746; Nomura and Lee, 1993: 3; Kurbatov, 2007: 294.

    Diagnosis. Body reddish brown to yellowish brown (Fig. 1A and B). Head and pronotum strongly narrowed than abdomen (Fig. 1A and B). Male with large convex eye (Fig. 1H), female absent (Fig. 1I). Antennomeres 1-2 rectangular, and 11 extremely enlarged with many setae (Fig. 1A and B). Pronotum longer than wide (Fig. 1A and B). Elytra many setae and three foveae on each elytron. Male hind wing well-developed, female extremely reduced. Male abdominal sternite IX with a pair of lobes (Fig. 1D, red arrows), X triangular (Fig. 1E). Male genitalia bulb-shape (Fig. 1F).

    Materials examined.Korea: Jeonnam Prov.: 2♂, Gurim-ri, Samsan-myeon, Haenam-gun, 19.V.2019. 34°29'42.7"N 126° 37'38.8"E, 147 m. leaf litter & Deadwood debris, Ji-Won Kang (CBNUIC); Chungnam Prov.: 4♂, Geumsan-Gun, 21V-10Ⅵ 2006, FIT (CNUIC); 20♂, Gongju-City, Mt. Gyeryonsan, Donghaksa, N 36°21'17.4" E 127°14'55.7", 1.VI.-18.VI.2004, SM Choi, JS Park. ex FIT (CNUIC); 2♀, Oncheon-ri, Banpo-myeon, Gongju-si, 3.V.2019, 36°22'15.1"N 127°15'57.8"E 120 m, Leaf litter, JW Kang, YJ Choi, JS Park, Deadwood debris sifting near stream (CBNUIC); Gangwon Prov.: 2♂, Jeongseon-gun, Jeongseon-eup, Mt. Gariwangsan recreation forest, N37°24'54" E128°32'10.1", 26.V.-12.VI.2009, TK Kim, YH Kim, JH Song, SG Lee, ex FIT (CNUIC).

    Distribution. Korea (Fig. 2), Japan.

    Remarks.Philoscotus rostralis is known as a predator of small creatures in soil habitats, but specific biology is unknown. This species can be separated from the other Korean Philoscotus species, P. coreanus Nomura and Lee, by longer head length and a pair of lobes of male abdominal sternite IX. Specimens of this species were collected using flight intercept traps (FIT), or by sifting leaf, wood debris near stream. Female specimens were not collected by FIT because of lacking the ability to fly by extremely reduced hind wing.


    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 (NIBR201902108).


    Philoscotus rostralis. A: male habitus, dorsal view; B: female habitus, dorsal view; C: male abdominal tergite VII, ventral view; D: male abdominal sternite IX (red arrows: lobes of male abdominal sternite IX); E: male abdominal sternite X; F: male genitalia in ventral view; G: female genital plate; H: male head, lateral view; I: female head, lateral view. Scale bars: A-B = 1 mm, C-I = 0.1 mm.


    Distributions of Philoscotus rostralis in the Korea (dots).


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