Anthomyza, Fallen, 1810

Roháček, Jindřich, 2020, Anthomyzidae (Diptera) of Taiwan: new species but no new records, Acta Entomologica Musei Nationalis Pragae 60 (1), pp. 269-290 : 286-287

Anthomyza sp. nov. near elongata

Material examined. TAIWAN: Ilan [= Yilan County]:Tatung Chilanshan [= Qilanshan], sweeping net, 15.ix.1992, 1 ♀, W. T. Yang leg. ( NMNS, damaged, genit. prep.).

Diagnosis. Large species (body length 3.53 mm, wing length 3.85 mm, wing width 1.15 mm) closely resembling A. elongata sp. nov. but differing as follows: eye slightly more oval; frons with anterior half yellow; frontal triangle broad but short (reaching only to about middle of frons) and dull brown (markedly paler than in A. elongata ); stripes between frontal triangle and orbits also dull brown and short, not reaching in front of frontal triangle; sternopleuron almost entirely yellow with only anterodorsal corner pale brown; hypopleuron ochreous to pale brown. Postabdomen also similar to that of A. elongata but T6 shorter and not tapered posteriorly; S6 broad, distinctly wider than long; T7+S7 longer, with anteroventral corners of its original T7 pale brown, extended onto ventral side and meeting medially; remnant of S7 forming membranous, almost unpigmented triangle behind these corners but long setose (as is S7 of A. elongata ); S8 longer and with longer setae; ventral receptacle with middle dilated part hyaline and vermicular distal part with apex more (twice) twisted; spermathecae most similar to those of A. elongata , shortly pyriform; cercus relatively long but wider than in A. elongata .

Discussion. This undescribed species is left unnamed because there is only a single, somewhat damaged female available for examination. It is a member of the A. flavosterna group (as defined above) and undoubtedly the closest relative of another Taiwanese species, A. elongata sp. nov. (see diagnosis above). It will be described as and when additional material (including males) is obtained for study.

Biology. Unknown. The only known female was swept from vegetation in September.

Distribution. Taiwan: Yilan County.