Bryaxis mahunkai Loebl , 1975

Choi, Yeon-Jae, Park, Sun-Jae, Lee, Seung-Gyu & Park, Jong-Seok, 2023, Five new species of Bryaxis Kugelann (Coleoptera, Staphylinidae, Pselaphinae) from Korea and a nomenclatural note on Bryaxis mahunkai Loebl, ZooKeys 1182, pp. 165-181 : 165

Bryaxis mahunkai Loebl, 1975

Fig. 10

Bryaxis mahunkai Löbl, 1975: 117.

Bryaxis leechanyoungi Nomura & Lee, 1993: 27; syn. nov.

Material examined

(N = 60, 34 ♂♂, 26 ♀♀). 1♂ (CBNUIC, dried). " Korea: Chungbuk Prov., Mt. Songnisan, Beopjusa-ro, Songnisan-myeon , Boeun-gun , 20 Sep 2019, 36°32'55.6"N, 127°51'19.8"E, 476 m, flood debris, Y.-J. Choi, J.-W. Kang " . 2♂♂, 11♀♀ (CBNUIC, dried). " Korea: Gangwon Prov., Garakjae-ro, Hwachon-myeon, Hongcheon-gun , 5 May 2019, 37°46'26.0"N, 127°54'48.0"E, 240 m, sifting leaf litter near stream, J.-S. Park " . 1♂ (CBNUIC, dried). " Korea: Gangwon Prov., Jangjeon-gil, Jinbu-myeon, Pyeongchang-gun , 11 Mar 2019, 37°27'58.0"N, 128°32'18.4"E, 901 m, sifting leaf litter & dead wood debris & moss, J.-W. Kang " . 7♂♂, 7♀♀ (CBNUIC, dried). " Korea: Gyeongbuk Prov., Gowol-gil, Yeongyang-eup, Yeongyang-gun , 19 Mar 2019, 36°38'48.1"N, 129°09'18.7"E, 265 m, sifting leaf litter, Y.-J. Choi " . 2♂♂ (CBNUIC, dried). " Korea: Gyeongbuk Prov., Yongmunsa-gil, Yongmun-myeon, Yecheon-gun , 1 Jun 2019, 36°43'45.0"N, 128°22'14.0"E, 358 m, sifting leaf litter & soil near stream, U.-J. Byeon " . 7♂♂ (CBNUIC, dried). " Korea: Gyeonggi Prov., Mt. Bukhansan, Daeseomun-gil, Deogyang-gu , Goyang-si , 23 Aug 2019, 37°39'43.7"N, 126°59'11.2"E, 491 m, sifting leaf litter & soil & dead wood debris, Y.-J. Choi, T.-Y. Jang " . 4♂♂ (CBNUIC, dried). " Korea: Gyeonggi Prov., Mt. Yeoninsan, Yongchu-ro, Gapyeong-eup , Gapyeong-gun , 15 Apr 2019, 37°51'29.5"N, 127°28'01.0"E, 193 m, sifting leaf litter & moss near stream, J.-Y. Kang, J.-W. Kang " . 5♂♂, 3♀♀ (CBNUIC, dried). " Korea: Gangwon Prov., Hwanseon-ro, Singi-myeon, Samcheok-si , 23 Aug 2018, 37°20'22.6"N, 129°03'28.5"E, 172 m, sifting leaf litter near mountain stream, Y.-J. Choi " . 5♂♂, 5♀♀ (CBNUIC, dried). " Korea: Jeonnam Prov., Mt. Heukseoksan, Biseuran-gil, Gyegok-myeon , Haenam-gun , 18 May 2019, 34°40'44.9"N, 126°37'10.9"E, 160 m, sifting mushroom & leaf litter & plant root under rock in bamboo forest, S.-H. Choi, U.-J. Byeon " .

Remarks.

Adult males of this species are characterized by the following combination of characters: maxillary palpomeres II-III tubercular ventrally; antennal scapes tubiform, more curved on the internal side; pedicels globularly enlarged and a glandular nodule situated at the basal 1/3 (Fig. 10A, B , arrows); parameres with four setae each; and an endophallus consisting of two slender struts, converging subapically (Fig. 10C, D ).

Comments.

Dorsal habitus of the holotype is available in Park and Jeon (2012; https://ecolibrary.me.go.kr/nibr/#/search/detail/5513253). Illustrations of antenna and aedeagus were obtained from Löbl (1975), and compared to those of specimens examined in this study. All specimens collected in Korea were recognized as B. mahunkai Löbl based on the antennal scapes (curved internally), pedicels (swollen and bearing upward glandular nodule), and the aedeagus (structure of endophallus).

Distribution.

Korea (Kaesong-si, Gyeonggi-do; Gapyeong-gun, Gyeonggi-do; Goyang-si, Gyeonggi-do; Boeun-gun, Chungcheongbuk-do; Hongcheon-gun, Gangwon-do; Samcheok-si, Gangwon-do; Pyeongchang-gun, Gangwon-do; Yeongyang-gun, Gyeongsangbuk-do; Yecheon-gun, Gyeongsangbuk-do; Haenam-gun, Jeollanam-do).

Figures

Figure 10. Diagnostic characters of Bryaxis mahunkai Loebl. A, B antennal scapes and pedicels C, D aedeagi. Scale bars: 0.1 mm.