Minettia (Minettiella) zhaotongensis, Li & Chen & Yang, 2020

Li, Wenliang, Chen, Xulong & Yang, Ding, 2020, Four new species of the subgenus Minettiella from China (Diptera, Lauxaniidae, Minettia), ZooKeys 932, pp. 93-111 : 93

Minettia (Minettiella) zhaotongensis sp. nov. Figures 31-35 , 36-40

Type material.

Holotype: ♂(CAUC), China, Yunnan: Zhaotong Xiaocaoba, 1715 m, 15.ix.2009, Tingting Zhang. Paratypes: 1♀ (CAUC), China, Yunnan: as holotype; 1♂, 1♀ (CAUC), China, Yunnan: Zhaotong Xiaocaoba, 1715 m, 15.ix.2009, weina Cui; 1♀ (CAUC), China, Yunnan: Zhaotong Xiaocaoba, 1900 m, 15.ix.2009, weina Cui; 1♂, 1♀ (CAUC), China, Yunnan: Kunming Heilongtan, 2016 m, 23.vii.2006, Kuiyan Zhang; 1♀ (CAUC), China, Yunnan: Kunming Heilongtan, 2016 m, 23.vii.2006, Wenliang Li.

Etymology.

The specific epithet is named for the holotype locality in Yunnan, Zhaotong.

Diagnosis.

Face and parafacial with dense grayish white pruinescence. Anterior fronto-orbital setae reclinate, shorter than posterior fronto-orbital setae. Mesonotum with 0+2 dorsocentral setae, acrostichal setulae in six irregular rows. Mid and hind tarsomeres dark yellow (sometimes fore tarsomeres also dark yellow). Wing slight yellow and hyaline, brown at base. Dorsal of epandrium narrower than dorsal of syntergosternite. Surstylus separated from epandrium, claviform, with single long seta in the middle, expanded apicially in lateral view and cone-shaped in posterior view. Postgonite hairy. Aedeagal apodeme tubular, as long as half-length of aedeagus.

Description.

Male. Body length 3.9-4.2 mm, wing length 4.4-4.8 mm. Female. Body length 3.8-4.3 mm, wing length 4.3-4.9 mm.

Head (Fig. 31 ) black. Face and parafacial with dense grayish white pruinescence. Frons dark brown, as long as wide and parallel-sided, two black longitudinal stripes along fronto-orbital rows, extending from ocellar triangle to occiput; ocellar triangle black, ocellar setae developed, longer than anterior fronto-orbital setae and posterior fronto-orbital setae, extending to anterior margin of frons; anterior fronto-orbital setae reclinate, shorter than posterior fronto-orbital setae. Gena ca. 1/6 height of eye. Antenna brownish yellow, first flagellomere blackish brown on 2/3 apex of dorsal margin, 1.7 times longer than high; arista blackish brown except paler basally, pubescent with longest setulae almost as long as 1/4 height of first flagellomere. Proboscis blackish brown, with pale yellow and black setulae; palpus black with black setulae.

Thorax (Fig. 34 ) black, with gray pruinescence. 0+2 dorsocentral setae, acrostichal setulae in six irregular rows, with pair of strong acrostichal setulae before prescutellar setae; a pair of prescutellar setae, almost as long as anteriormost dorsocentral setae. One anepisternal seta and one katepisternal seta. Legs black, tibia brownish yellow at base (sometimes tibia dark yellow), mid and hind tarsomeres dark yellow (sometimes fore tarsomeres also dark yellow). Fore femur with eight posterior dorsal setae and five posterior ventral setae; fore tibia with one dorsal preapical seta and one short apical ventral seta. Mid femur with three or four anterior setae and one short apical posterior seta; mid tibia with one strong dorsal preapical seta and one strong apical ventral seta. Hind femur with one preapical anterior dorsal seta; hind tibia with one weak dorsal preapical seta and one short apical ventral seta. Wing slight yellow and hyaline, brown at base; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5), and 4th (between R4+5 and M1) sections in proportion of 9.6: 2.5: 1.7; r-m beyond middle of discal cell; ultimate and penultimate sections of M1 in proportion of 6.5: 3.7; ultimate section of CuA1 ca. 1/5 of penultimate. Haltere pale yellow.

Abdomen (Fig. 35 ) black, with sparse gray pruinescence. Male genitalia (Figs 36-40 ): syntergosternite circular, broad dorsally and narrow ventrally. Dorsal of epandrium narrower than dorsal of syntergosternite. Surstylus separated from epandrium, claviform, with a long seta in the middle, expanded apically in lateral view and cone-shaped in posterior view, with connective weakly sclerotized claviform sclerite; hypandrium wide on both sides and concave in the middle, U-shaped. Postgonite hairy. Aedeagus with pair of ventral sclerites on basal 1/3 in ventral view, with membranous spiny processes apically, with small apical concave; aedeagal apodeme tubular, as long as half length of aedeagus.

Remarks.

The new species is very similar to Minettia (Minettiella) tianmushanensis Shi & Yang from Hainan in the following characteristics: mesonotum with 0 + 2 dorsocentral setae, a pair of strong acrostichal setulae present in front of prescutellar setae; the mid femur with three or four anterior setae; the surstylus is claviform, cone-shaped in posterior view, but it can be separated from the latter in the frons with two black longitudinal stripes along fronto-orbital rows; acrostichal setulae in six irregular rows; aedeagal apodeme as long as half length of aedeagus. In M. (Minettiella) tianmushanensis , the frons without black longitudinal stripe; acrostichal setulae in four irregular rows; aedeagal apodeme as long as aedeagus.

The new species is very similar to Minettia (Minettiella) membranacea sp. nov. from Yunnan in the following characteristics: frons with two black longitudinal stripes along fronto-orbital rows, extending from ocellar triangle to occiput; mesonotum with 0 + 2 dorsocentral setae, acrostichal setulae in six irregular rows, and a pair of strong acrostichal setulae present in front of prescutellar setae; wing slight yellow and hyaline, pale yellow at base, but it can be separated from the latter in the fore femur with five posterior ventral setae, the mid femur with four anterior setae, the syntergosternite with one broad membranous process; the hypandrium narrow and U-shaped; the aedeagus with long spines ventrally. In M. (Minettiella) membranacea sp. nov., the fore femur with six posterior ventral setae, the mid femur with three anterior setae, the syntergosternite with one anterior median process in lateral view, one membranous band under ventral bridge; the hypandrium V-shaped; the aedeagus with membranous processes internally.

Distribution.

China (Yunnan).

Figures

Figures 31 - 35. Minettia (Minettiella) zhaotongensis sp. nov. Male 31 head, anterior view 32 wing 33 habitus, lateral view 34 thorax, dorsal view 35 abdomen, dorsal view.

Figures 36 - 40. Minettia (Minettiella) zhaotongensis sp. nov. Male 36 syntergosternite and epandrium, lateral view 37 epandrial complex, posterior view 38 syntergosternite, anterior view 39 aedeagal complex, ventral view 40 aedeagal complex, lateral view. Scale bar: 0.5 mm.