Stiphrosoma Czerny, 1928

Wang, Qian, Wang, Donghui & Shi, Li, 2021, A genus and three species of Anthomyzidae newly recorded from China (Diptera), Zoological Systematics 46 (2), pp. 163-175 : 170-172

Genus Stiphrosoma Czerny, 1928

Stiphrosoma Czerny, 1928: 6 [neuter]; Frey, 1958: 31 (key); Trojan, 1962: 35; Soós, 1981: 114; Roháček & Freidberg, 1993: 63 (key);

Roháček, 1996: 90 (redescription); Roháček 1998b: 275 (key); Roháček & Barber, 2005: 5 (redefinition). Type species: Stiphrosoma oldenbergi Czerny, 1928: 6 (designated by Enderlein 1936: 167, by elimination) = S. sabulosum ( Haliday, 1837) . Striphosoma: Séguy, 1934: 301, 304 (incorrect subsequent spelling).

Ptenotaenia Enderlein, 1936: 167 [feminine]. Type species: Opomyza (Geomyza) sabulosa Haliday, 1837: 151 (monotypy).

Description ( Roháček, 2006, 2009). Frons relatively wide, frontal triangle more or less distinct; occiput medially with a pair of convergent silvery white microtomentose stripes above foramen; antennal 1st flagellomere laterally compressed; arista distinctly pectinate; 2 long fronto-orbital setae. Mesonotum with 1 small presutural seta or reduced to microseta (rarely presutural seta as long as supraalar), 1 short supraalar seta, 1 longer postalar seta, 2 long postsutural dorsocentral setae; acrostichal microsetae in 4‒6 rows. Legs usually yellow, often with brown apical tarsal segment, rarely also femora and tibiae brown; fore femora having or lacking a ctenidial spine. Wing unicolourous, relatively short and narrow, sometimes greatly reduced with modified venation; cell dm relatively short and narrow; cross-vein r-m situated in proximal third to two-fifths of dm cell, rarely dm-cu absent. Male genitalia: epandrium relatively broad, always wider than long, moderately to densely setose, with 1‒3 pairs of longer setae; hypandrium without anterior dorsally projecting flat internal lobes; transandrium simple, transverse, without caudal process, ventrally with only basal membrane; pregonite small, inconspicuous, fused to hypandrium, setulose; postgonite medium sized, usually slender, slightly bent to S-shaped, with 1 seta; aedeagus with small framed phallophore connected by ventral band-like sclerites with distiphallus; distiphallus composed of voluminous membranous saccus and slender sclerotized filum; filum formed by 2 longitudinal band-like, more or less fused sclerites and its unpigmented apex terminated in various sharp processes, teeth, spinulae and/or setulae; aedeagal part of folding apparatus with well-developed connecting sclerite and its external wall provided with various sculpturing (dense spine-like or tuberculiform excrescences). Female abdominal tergite 8 plate-shaped, of variable shape and pigmentation, sparsely setulose; sternite 8 short, transverse, with a posteromedial cleft, or medially membranous to divided; internal sclerotization of genital chamber formed by 1 to 3 pairs of crooked and partly fused posterior sclerites and 1 anterior very narrow and very transversely looped sclerite; spermathecae (1+1) shortly to elongately pyriform, with surface covered by dark curved spines which may be transversely attached to surface and carrying minute pale globulae.

Remarks. The genus Stiphrosoma includes 8 species worldwide, all from the Palaearctic and Nearctic Regions. It is reported in China for the first time.