Noeetomima liui, Li & Chen & Yang, 2020

Li, Wenliang, Chen, Xulong & Yang, Ding, 2020, Five new species of the genus Noeetomima Enderlein (Diptera: Lauxaniidae) from China, with a key to world species, Zootaxa 4768 (4), pp. 499-516 : 507-508

Noeetomima liui sp. nov.

( Figs. 21–30 )

Diagnosis. Palpus brown with black setulae. Mesoscutum: presutural dorsocentral seta before horizontal level of presutural acrostichal setulae. Scutellum shiny blackish brown, with grayish white pruinosity on basal 1/3. Fore femur with 5 strong posterior ventral setae and hind femur with 2 strong anterior ventral setae. Wing with 7 long white radiating stripes along margin between tips of R 2+3 and CuA 1, short irregular white lines in brown central area. Surstylus consisting of 1 anterior process and 1 posteroapical process in lateral view; anterior process long with setae, apex acute, posterior process short, widening apically and truncated.

Description. MALE. Body length 2.2 mm, wing length 2.7 mm. FEMALE. Unknown

Head ( Fig. 21 ) mostly pale yellow. Face pale yellow at base, with brown groove near ventral margin and brown on margin; parafacial pale yellow except blackish brown inner margin, with narrow brown median stripe on basal 1/2 and an elliptical brown ventroapical spot. Frons wider than long slightly, trapeziform (anterior margin shorter than posterior margin), with pair of narrow brownish median stripes, extending to ocellar triangle from anterior margin; ocellar triangle blackish gray, ocellar seta developed, longer than anterior fronto-orbital seta, anterior frontoorbital seta shorter than posterior fronto-orbital seta; fronto-orbital seta each with 1 blackish brown basal spot fused to a narrow stripe. Gena about 1/5 height of eye. Occiput with grayish pruinosity. Antenna yellow, flagellomere 1 and arista broken. Brown spot present between eye and antenna. Proboscis pale brownish yellow, with yellowish and blackish setulae; palpus brown with black setulae.

Thorax ( Fig. 24 ) brown, with grayish yellow pruinosity. Mesoscutum with pair of narrow brown median stripes extending from anterior margin to presutural acrostichal setulae, posterior margin of postpronotum surrounded by brown line, 3–4 brown spots scattered between dorsocentral and supraalar setal rows, pair of black triangular posterior marginal spots(the bottom of spots fused) extending to scutellum; 1+3 dorsocentral setae, anteriormost post-sutural dorsocentral seta near transverse scutal suture, presutural dorsocentral seta before horizontal level of presutural acrostichal setulae, 1+2 acrostichal setulae (not including prescutellar seta) and in 2 rows, 1st post-sutural acrostichal setulae on transverse scutal suture; dorsocentral seta, acrostichal setulae and prescutellar seta each with 1 brown basal spots. Anepisternum and katepisternum brown with grayish pruinosity; anepisternum with 2 median brown spots and 1 brown spot on lower margin, 2 anepisternal setae and 3–4 short setulae; 2 katepisternal setae. Scutellum shiny blackish brown, with grayish white pruinosity on basal 1/3. Legs yellow except apical tarsomeres brown; femur pale brown to brown except yellow at tip, tibia with 1 subbasal ring. Fore femur with 5 strong posterior ventral setae and 4 posterior dorsal setae; fore tibia with 1 long dorsal preapical seta and 2 short apical ventral setae. Mid femur with 4 anterior setae and 1 apical posterior seta; mid tibia with 1 strong dorsal preapical seta and 1 strong apical ventral seta. Hind femur with 2 strong anterior ventral setae and 1 preapical anterior dorsal seta; hind tibia with 1 dorsal preapical seta and 1 short apical ventral seta. Wing ( Fig. 22 ) almost brown, with 7 long white radiating stripes along margin between tips of R 2+3 and CuA 1; short irregular white lines in brown central area; posterior margin undulating; 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 4.6: 1.8: 1; r-m beyond middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 2.5: 1; ultimate section of CuA 1 about 1/11 of penultimate. Halter brown, stem yellow.

Abdomen ( Fig. 25 ) blackish brown, with blackish gray pruinosity, but syntergosternite and epandrium yellow. Male genitalia ( Figs. 26–30 ): syntergosternite slender, circular with pair of small triangular ventral processes in anterior view, almost confluent with epandrium; epandrium with several rows of dorsal setae, each with brownish spot at base; surstylus consisting of 1 anterior process and 1 posteroapical process in lateral view; anterior process long with setae, apex acute, posterior process short, widening apically and truncated; hypandrium small, Y-shaped, inner process almost membranaceous. Gonopod long and strong, curved in ventral view, with long setulae and roughness at tip, curved apically in lateral view; phallus consisting of 1 ventral sclerite and 1 dorsal sclerite, dumbbell-shaped in lateral view; phallus with small apical concavity in ventral view. Phallapodeme long, slightly shorter than phallus.

Type material. Holotype ( CAUC): 1 ♂, CHINA, Yunnan Province: Tengchong Shabacun , 2006. V. 18, Xingyue Liu.

Distribution. China (Yunnan)

Remarks. The new species is very similar to Noeetomima radiata Enderlein from Harbin, but N. liui can be separated from the latter by the hind femur having 2 anterior ventral setae; face having brown groove near ventral margin.

Etymology. Liui, Latin, named after Xingyue Liu, the collector of the holotype.

Figures

FIGURES 21–25. Noeetomima liui sp. nov. Male. 21. head, anterior view; 22. wing; 23. habitus, lateral view; 24. thorax, dorsal view; 25. abdomen, dorsal view.

FIGURES 26–30. Noeetomima liui sp. nov. Male. 26. syntergosternite and epandrium, lateral view; 27. epandrial complex, posterior view; 28. syntergosternite, anterior view; 29. aedeagal complex, ventral view; 30. aedeagal complex, lateral view. Scale 0.5 mm.