Luzonomyza brevis Li & Yang, 2021

Li 1, Wenliang, Chen 1, Xulong, Feng 1, Keli, Zhao 2, Shengjuan & Yang 3, Ding, 2021, Four new species of the genus Luzonomyza Malloch (Diptera, Lauxaniidae) from China, ZooKeys 1074, pp. 43-59 : 43

Luzonomyza brevis Li & Yang sp. nov.

Figures 1-4 , 5-8

Type material.

Holotype. ♂ (CAUC), China, Yunnan Province, Longling County, Xiaoheishan Reserve; 24°33'51"N, 98°49'20"E; 1840 m; 26 Apr 2012; Wenliang Li leg.

Etymology.

Latin, brevis, referring to the epandrium with short dorsoapical processes. It is an adjective in apposition.

Diagnosis.

Frons with 3 brown longitudinal stripes, median longitudinal stripe wide, extending from anterior margin to ocellar triangle, lateral longitudinal stripes narrow; face with a diamond-shaped brown marking in the middle, four angles of marking extending to facial margins. Mesonotum with 4 brown stripes. Epandrium with paired dorsoapical processes; phallapodeme claviform, shorter than phallus.

Description.

Male. Body length 4.8 mm, wing length 4.3 mm.

Head yellow. Face with an angular hump on middle of basal half, lateral margin brown on apical half, with a diamond-shaped brown marking in the middle, 4 angles of marking extending to facial margins; parafacial with sparse short hairs, with a black spot between eye and antennal bases, and with 5 long setae extending to gena. Frons ~1.2 × longer than wide and parallel-sided, with 3 brown longitudinal stripes, a broader brown median longitudinal stripe extending from anterior margin to ocellar triangle, 2 lateral longitudinal stripes narrower and pale brown, anterior half with short setulae; ocellar triangle grayish black, ocellar setae very small, hair-like, anterior fronto-orbital seta reclinate, shorter than the posterior one. Gena with broad brown stripe, ~1/3 height of eye. Antenna yellow, rounded apically, ~1.2 × longer than high; arista brown except for yellow base, pubescent. Proboscis yellow with white and black setulae, and with a pair of irregular blackish-brown lateral spots apically; palpus yellow with black setulae.

Thorax (Fig. 3 ) brownish yellow, with grayish-white pruinescence. Mesonotum with 4 brown stripes extending to tip of scutellum, occupying most of scutellum. 0+3 dorsocentral setae, anteriormost dorsocentral seta away from scutal suture; acrostichal setulae in 4 rows; a pair of prescutellar setae, shorter than anteriormost dorsocentral seta. Dorsal and posterior margin of anepisternum and dorsal margin of katepisternum pale yellow. One anepisternal seta, 1 katepisternal seta. Legs mostly yellow; fore tarsomeres 2-5 pale brown, mid-legs differently colored: only right mid femur blackish brown but brownish yellow at base. Fore femur with 7 posterodorsal setae and 6 posteroventral setae, fore tibia with a long dorsal preapical seta and a short apicoventral seta. Mid tibia with a strong dorsal preapical seta and an apicoventral seta. Hind femur with a weak preapical anterodorsal seta; hind tibia with a long dorsal preapical seta and a short apicoventral seta. Wing pale brown along costal margin, extending to M1, a brown spot on each of the crossveins r-m and dm-cu; subcostal cell brown; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1) sections in ratios of 9.7: 1.5: 1.4; r-m on middle of discal cell; ultimate and penultimate sections of M1 in ratios of 6.6: 3.5; ultimate section of CuA1 ~1/5 of penultimate. Haltere pale yellow.

Abdomen (Fig. 4 ) yellow, tergites 2-6 blackish brown on posterior margin. Male genitalia (Figs 5-8 ): syntergosternite confluent with epandrium, near triangular. Epandrium with a pair of long conical dorsoapical processes in lateral view, a pair of lateral processes broad apically and narrow basally on anterior margin. Surstylus situated in ventral angle and small; hypandrium V-shaped, with 2 pairs of inner apical processes. Gonopod absent, hypandrium confluent with phallus. Phallus with a pair of lateral preapical acute processes in ventral view; dorsal process broader in lateral view, vertical to phallus, anterior apical angle acute. Phallus deeply concave apically, phallapodeme claviform, shorter than phallus.

Female. Unknown.

Remarks.

This new species is very similar to Luzonomyza sasakawai from Thailand and Vietnam by the body markings and wing type, but it can be separated from the latter by the 3 narrow brown stripes on the frons; by the brown fore tarsomeres 2-5; by the epandrium with dorsoapical processes. In Luzonomyza sasakawai , the frons has a narrow brown stripe; the fore tarsomeres 3-5 are black; the epandrium is without dorsoapical process.

Distribution.

China (Yunnan).

Figures

Figures 1 - 4. Luzonomyza brevis sp. nov. Male 1 wing 2 habitus, lateral view 3 thorax, dorsal view 4 abdomen, dorsal view.

Figures 5 - 8. Luzonomyza brevis sp. nov. Male 5 syntergosternite and epandrium, lateral view 6 epandrial complex, posterior view 7 phallic complex, ventral view 8 phallic complex, lateral view. Scale bar: 0.5 mm.