Minettia (Minettia) terminalis, 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 : 243-246

Minettia (Minettia) terminalis sp. nov.

( Figs. 150–159 )

Diagnosis. Mesonotum with three pair of grayish white median pruinose stripes and three pairs of grayish white lateral pruinose spots, one grayish white short pruinose stripe present between prescutellar setae, scutellum with a pair of grayish white pruinose spots at tip; two post-sutural dorsocentral setae; abdominal tergites 1–4 with discontinuous black transversal stripes, tergites 5–6 with six black spots.

Description. Male: body length 2.8–3.0 mm, wing length 3.0– 3.1 mm. Female: body length 2.8 mm, wing length 3.0 mm.

Head ( Fig. 150 ) blackish brown, with grayish white pruinescence. Frons wider than long and parallel-sided, anterior margin yellow; ocellar triangle black, ocellar setae developed; anterior fronto-orbital setae reclinate, shorter than posterior fronto-orbital setae. Gena about about 1/6 height of eye. Antennal scape and pedicel black, first flagellomere yellow except blackish brown at middle, about 1.5 times longer than high; arista black except brown basally, plumose with longest setulae longer than height of first flagellomere. Proboscis blackish brown, with black setulae; palpus black with black setulae.

Thorax ( Fig. 153 ) blackish brown, with grayish white pruinescence. Mesonotum with a pair of grayish white median pruinose stripes, two pairs of grayish white lateral pruinose stripes and three pairs of grayish white lateral pruinose spots, one grayish white short pruinose stripe present between prescutellar setae, scutellum with a pair of grayish white pruinose spots at tip; two post-sutural dorsocentral setae; acrostichal setulae in six rows; a pair of prescutellar setae, at the same level with second post-sutural dorsocentral setae, far away from scutellum, shorter than the first post-sutural dorsocentral setae. One anepisternal seta, two katepisternal setae. Fore coxa, trochanter and femora brown, tibia and tarsi yellow; mid and hind femora brown except yellow at middle, coxa, trochanter, tibia and tarsi yellow, coxa partly black; all tibiae with three brown rings. Fore femur with eight posterior dorsal setae, six 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. 151 ) hyaline and pale brown basally, tip of subcostal cell with one brown spot; 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 13.9: 4.8: 3.1; r-m before the middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 9.0: 7.4; ultimate section of CuA 1 about 1/4 of penultimate section. Haltere pale yellow.

Abdomen ( Fig. 154 ) yellow, with grayish white pruinescence, tergites 1–4 with discontinuous black transversal stripes, tergites 5–6 with six black spots. Male genitalia ( Figs. 155–159 ): syntergosternite semicircular with setae. Epandrium narrow, surstylus nearly triangular, curved in lateral view, hypandrium with one broad membranous inner process at middle. Postgonite degenerate. Phallapodeme strong, as long as phallus. Phallus broad basally and narrow apically in ventral view, base protruded to the dorsum in lateral view; with concavity apically.

Type material. Holotype ( CAUC): ♁, CHINA, Yunnan Province: Xishuangbanna, Mengla County, Yaoqu , 2009. V. 13, Tingting Zhang . Paratypes ( CAUC): 1 ♁, 1 ♀, CHINA, Yunnan Province: Hekou County, Nanxi Town , 2009. V . 22, Guoquan Wang; 1 ♀, CHINA, Yunnan Province: Xishuangbanna, Mengla County, Bubeng Village , 2009. V . 9, Guoquan Wang.

Distribution. China (Yunnan).

Etymology. Latin, terminalis , referring to the subcostal cell of new species with a brown spot apically.

Remarks. The mesonotum of new species with a pair of grayish white median pruinose stripes, two pairs of grayish white lateral pruinose stripes and three pairs of grayish white lateral pruinose spots; one grayish white short pruinose stripe present between prescutellar setae, scutellum with a pair of grayish white pruinose spots at tip; tibia with three brown rings; subcostal cell with one brown spot at tip; abdomen yellow, tergites 1–4 with discontinuous black transversal stripes, tergites 5–6 with six black spots. These characteristics are different from other species of subgenus Minettia .

Figures

FIGURES 150–154. Minettia (Minettia) terminalis sp. nov. Male. 150. head, anterior view; 151. wing; 152. habitus, lateral view; 153. thorax, dorsal view; 154. abdomen, dorsal view.

FIGURES 155–159. Minettia (Minettia) terminalis sp. nov. Male. 155. syntergosternite and epandrium, lateral view; 156. epandrial complex, posterior view; 157. syntergosternite, anterior view; 158. phallic complex, ventral view; 159. phallic complex, lateral view. Scale 0.5 mm.