Anthomyza trifurca Sueyoshi & Roháček, 2003

Roháček, Jindřich, 2021, New species and records of Anthomyzidae (Diptera) from the East Palaearctic, with a checklist of taxa occurring in the area, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 261-288 : 277-278

Anthomyza trifurca Sueyoshi & Roháček, 2003

( Fig. 46 )

Material examined. JAPAN: KඒඎඌΗඎ: Fukuoka Pref., Inunaki-yama, 23.x.2015, 1 J, T. Saigusa leg. ( SIINH, genit. prep.); Fukuoka Pref., Fukuoka, Mitsuse, Mt. Sefuri, Kitayma (Hokuzan) Dam, 33°25ʹ58.4ʺN 130°13ʹ58.6ʺE, 355 m, sweeping forest edge, 10.x.2015, 10 JJ 7♀♀, M. Tkoč leg. (8 JJ 5♀♀ NMPC; 2 JJ 2♀♀ SMOC, 1 J 1♀ genit. prep.); Kumamoto Pref., Shimomashiki District, Misato, Midorikawa Dam, 32°37ʹN 130°54ʹE, 365 m, sweeping forest edge, 19.x.2015, 1 J 4 ♀♀, M. Tkoč leg. ( NMPC, 1 ♀ genit. prep.); same locality but 32°37ʹ26.5ʺN 130°54ʹ35ʺE, 190 m, sweeping forest edge, 21.x.2015, 1 J 2 ♀♀, M. Tkoč leg. ( NMPC, 1 J genit. prep.).

Remarks. A species of the Anthomyza bellatrix group (characterized by a solid, whitish-grey microtomentose spot on occiput (above foramen) as visible on Fig. 46 ), distinguished from related species by having the shortest ctenidial spine on f 1. Its closest relative, A. robusta Roháček, 2020 , has recently been described from Taiwan (RඈIJගඹൾκ 2020).

Biology. Based on above records from Japan and information provided by M. Tkoč (personal communication, 2016, 2020), the species seems to be associated with taller grasses growing at wet margins of forests ( Fig. 48 ).A series of adults collected at Midorikawa Dam on October 21, 2015 was swept from tufts of the large grass Miscanthus sinensis Andersson ( Fig. 47 ) which could be its host plant. Interestingly, A. robusta was also caught from this grass in Taiwan (RඈIJගඹൾκ 2020: 278 and fig. 3).

Distribution. Hitherto recorded only from easternmost parts of the Palaearctic Region, viz., Japan, North Korea, South Korea and China (Sichuan) (RඈIJගඹൾκ 2006, 2009, 2018). Interestingly, this species (common in Japanese archipelago and Korean peninsula) has not been encountered in the Far East of Russia up to now.

Figures

Figs 46–48. Anthomyza trifurca Sueyoshi & Roháček, male (South Korea) and its habitat in Japan. 46 – male, sublaterally, with a view of occiput; 47 – a tussock of grass, Miscanthus sinensis, probable host plant of the species in Kumamoto Pref. (Kyushu); 48 – various graminoids on forest margin, habitat of the species in Fukuoka Pref. (Kyushu). Photos by J. Roháček (46) and M. Tkoč (47, 48).