Minettia (Minettia) baii, Li & Bai & Yang, 2023

Li, Wenliang, Bai, Yingming & Yang, Ding, 2023, The genus Minettia Robineau-Desvoidy, 1830 (Diptera: Lauxaniidae: Lauxaniinae) from the Oriental Region with descriptions of seventeen new species, Zootaxa 5256 (3), pp. 201-249 : 238-241

Minettia (Minettia) baii sp. nov.

( Figs. 130–139 )

Diagnosis. Arista black except brown basally, plumose with longest setulae slightly shorter than height of first flagellomere; acrostichal setulae in six rows; mesonotum without pruinose or colored stripes; abdomen entirely black.

Description. MALE. Body length 4.0– 4.2 mm, wing length 4.5–4.6 mm. FEMALE. Unknown.

Head ( Fig. 130 ) blackish brown, with grayish white pruinescence. Frons wider than long and parallel-sided, anterior margin yellow; ocellar triangle black, ocellar setae developed, about as long as anterior fronto-orbital setae; anterior fronto-orbital setae reclinate, shorter than posterior fronto-orbital setae. Gena about 1/6 height of eye. Antenna brown, first flagellomere about 1.7 times longer than high; arista black except brown basally, plumose with longest setulae slightly shorter than height of first flagellomere. Proboscis blackish brown, with black setulae; palpus black, with black setulae.

Thorax ( Fig. 133 ) blackish brown, with grayish white pruinescence. 0+3 dorsocentral setae; acrostichal setulae in six rows; a pair of prescutellar setae, longer than the first post-sutural dorsocentral setae. One anepisternal seta, two katepisternal setae. Legs blackish brown. Fore femur with eight posterior dorsal setae, seven posterior setae and seven posterior ventral setae; fore tibia with one dorsal preapical seta and one apical ventral seta. Mid femur with six anterior setae; mid tibia with one strong dorsal preapical seta and one strong apical ventral seta. Hind tibia with one strong preapical anterior dorsal seta. Wing ( Fig. 131 ) pale yellow basally, hyaline; costa with 2nd (between R 1 and R 2+3), 3rd (between R 2+3 and R 4+5), and 4th (between R 4+5 and M 1) sections in proportion of 9.4: 2.6: 1.8; r-m on the middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 7.2: 3.6; ultimate section of CuA 1 about 1/5 of penultimate section. Haltere yellow.

Abdomen ( Fig. 134 ) black. Male genitalia ( Figs. 135–139 ): syntergosternite circular, sometimes with membranous ventral process. Epandrium broad, ventral margin with setae. Surstylus with setae, claviform and curved in lateral view, connected with a sclerite behind cercus; hypandrium nearly H-shaped. Postgonite cylindrical, with three long setae at tip. Phallus tubular basally, nearly arc-shaped in lateral view. Phallapodeme longer than phallus, without concavity apically.

Type material. Holotype ( CAUC): ♁, CHINA, Sichuan Province: Wolong National Nature Reserve, Wuyipeng, 2006. VII. 31, Xiaoshuan Bai . Paratypes ( CAUC): 1 ♁, CHINA, Sichuan Province: Wolong National Nature Reserve, Wuyipeng, 2006. VII. 31, Xingyue Liu .

Distribution. China (Sichuan).

Etymology. Latin, baii , named after Xiaoshuan Bai, the collector of the holotype.

Remarks. The mesonotum of new species without pruinose or colored stripes; abdomen entirely black without yellow stripe; phallus tubular basally, nearly arc-shaped in lateral view. These characteristics are different from other species of subgenus Minettia .

Figures

FIGURES 130–134. Minettia (Minettia) baii sp. nov. Male. 130. head, anterior view; 131. wing; 132. habitus, lateral view; 133. thorax, dorsal view; 134. abdomen, dorsal view.

FIGURES 135–139. Minettia (Minettia) baii sp. nov. Male. 135. syntergosternite and epandrium, lateral view; 136. epandrial complex, posterior view; 137. syntergosternite, anterior view; 138. phallic complex, ventral view; 139. phallic complex, lateral view. Scale 0.5 mm.