Stiphrosoma fissum Roháček, 1996

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 : 281

Stiphrosoma fissum Roháček, 1996

( Figs 53, 54 )

Material examined. RUSSIA: Fൺඋ Eൺඌඍ: Yuzh.Primorʼe:Kamenushka, 17.vi.1983, 1 ♀, 19.vii.1983, 2 JJ 5 ♀♀, 21.vii.1983, 1 ♀, 26.vii.1983, 1 ♀, 27.vii.1983, 1 J, 29.vii.1983, 2 ♀♀, A. Shatalkin leg. ( ZMUM, 1J genit. prep.). NORTH KOREA (D.P.R. Korea): 10 km NW of Pyongsong, 1.viii.1989, 2 ♀♀, M. Kozánek leg. ( SMOC).

Remarks. This species differs markedly from its relatives by its densely and long-haired arista ( Fig. 54 ) and somewhat resembles in this character the rare E. Palaearctic Ischnomyia barbarista , which is also known (paratype female) from Kamenushka in the Far East of Russia (see RඈIJගඹൾκ 2009: 63). However, the latter species can be separated by its shorter and yet denser pilosity of the arista and its longer and wider wing with the dm-cu situated near the middle of cell dm (RඈIJගඹൾκ 2009: 88). Stiphrosoma fissum proved to be an aberrant species of Stiphrosoma , having no close relative among other known species of the genus (see RඈIJගඹൾκ et al. 2019).

Distribution. Known only from easternmost areas of the Palaearctic: Japan (Hokkaido, Honshu), North Korea, South Korea and Russia (Far East: Primorʼe), see RඈIJගඹൾκ (1996), SඎൾඒඈඌIJං & RඈIJගඹൾκ (2003), RඈIJගඹൾκ (2006, 2009). The above records confirm its occurrence in the Russian Far East where it can be encountered relatively frequently.

Figures

Figs 49–55.Some E. Palaearctic Anthomyzidae.49 – Anthomyza clara Roháček, 2006, male, laterally (Japan), body length 2.22 mm; 50 – same specimen, head and thorax, dorsolaterally; 51 – Epischnomyia merzi Roháček, 2009, male, laterally (South Korea), body length 2.58 mm; 52 – same specimen, head and thorax, dorsally; 53 – Stiphrosoma fissum Roháček, 1996, male, laterally (South Korea), body length 1.79 mm; 54 – same species, female, laterally (South Korea), body length 1.85 mm; 55 – Stiphrosoma humerale Roháček & Barber, 2005, male, laterally (Far East of Russia), body length 1.90 mm. Photos by J. Roháček.