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 : 287

Anthomyza sp. nov. (1) near flavosterna

Material examined. TAIWAN: Chiayi [County]: Alishan, sweeping net, 4.x.1988, 3, K. S. Huang leg. ( NMNS, all heavily damaged, 1

genit. prep., 1 headless).

Diagnosis. Smaller, slender species (body length ca. 2.7 mm, the only measurable wing length 2.65 mm, wing width 0.85 mm) similar to A. flavosterna but differing as follows: thorax (including ventral part of pleuron) and abdomen dorsally blackish brown and shining; frons ochreous orange to yellow in anterior half; frontal triangle moderately long and broad (reaching to anterior third of frons), brown but relatively shiny due to sparse microtomentum; stripes between frontal triangle and orbits dull brown, only anteriorly paler; entire sternopleuron blackish brown; legs dark yellow but 2 or (sometimes) 3 terminal segments of tarsi brown; dorsal abdominal sclerites lustrous, almost lacking micropubescence. Male genitalia similar to those of A. flavosterna but gonostylus more oblong (with less convex anterior margin); phallapodeme with apex distinctly dilated laterally; pregonite with 6 setae in posterior group; saccus smaller and narrower; filum of distiphallus similar but basally twice broader, lacking the acute corner distally and its terminal slender projection distinctly longer and twisted in front of sharply acute apex.

Discussion. This is another distinctive new species which cannot be named and described because all studied specimens are heavily damaged including tattered wings, broken legs, antennae and setae. It is recognized as a close relative of A. flavosterna , particularly because of the very similarly formed male genital structures, including the pregonite, phallapodeme and distiphallus but for differences see above diagnosis. Formal description of this unusually dark and shining species requires additional and better-preserved material.

Biology. Unknown. The three males examined were swept in October in the Alishan mountain range.

Distribution. Taiwan: Chiayi County.