Noeetomima zhangae, 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 : 512-515

Noeetomima zhangae sp. nov.

( Figs. 41–50 )

Diagnosis. Palpus yellow except pale brown at tip. Mesoscutum: presutural dorsocentral seta before horizontal level of presutural acrostichal setulae. Scutellum brown except shiny black at tip. Fore femur with 4 strong posterior ventral setae and hind femur with 2 strong anterior ventral setae on apical 1/2. Wing with 10 white radiating stripes

along margin between tips of R 2+3 and CuA 1, with short irregular white lines in brown central area. Surstylus consisting of anterior process and posteroapical process in lateral view.

Description. MALE. Body length 2.7 mm, wing length 3.7 mm. FEMALE. Unknown.

Head ( Fig. 41 ) mostly pale yellow. Face pale yellow, lateral and ventral margin pale brown, brown groove near ventral margin; parafacial pale yellow except blackish brown inner margin, with narrow brown median stripe on dorsal 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 vertex; ocellar triangle blackish gray, ocellar seta developed, longer than anterior fronto-orbital seta, anterior fronto-orbital seta longer than half length of 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 pale yellow, flagellomere 1 pale brown on margin, near subuliform, about 1.6 times longer than high; arista white except yellow at base, pubescent, with short setulae. Narrow brown stripe spot present between eye and antenna. Eye without concavity on posterior ventral margin. Proboscis brownish yellow, with yellowish and blackish setulae; palpus yellow except pale brown at tip with black setulae.

Thorax ( Fig. 44 ) 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 round spots scattered between dorsocentral and supraalar setal rows; 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; prescutellar seta shorter than anteriormost postsutural dorsocentral seta; dorsocentral seta, acrostichal setulae and prescutellar seta each with 1 brown basal spot. Anepisternum with 2 anepisternal setae (posterior anepisternal seta strong) and 3–4 short setulae; katepisternum with 2 katepisternal setae. Scutellum brown except shiny black at tip. Legs yellow except apical tarsomeres brown; femur with brown subapical spot on inner side corresponding to subbasal ring on tibia. Fore femur with 4 strong posterior ventral setae and 6 posterior dorsal setae; fore tibia with 1 long dorsal preapical seta and 2 short apical ventral setae. Mid femur with 5 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. 42 ) almost brown, with 10 white radiating stripes along margin between tips of R 2+3 and CuA 1; with short white irregular lines in brown central area; posterior margin strongly 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 3.8: 1.2: 1; r-m beyond middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 2: 1; ultimate section of CuA 1 about 1/11 of penultimate. Halter brown, stem yellow.

Abdomen ( Fig. 45 ) shiny brown; tergites 2–5 brown, tergites 6–9 yellow; tergites 2–6 each with 5 pairs of setae on posterior margin. Male genitalia ( Figs. 46–50 ): syntergosternite slender, circular with pair of ventral processes in anterior view, mostly confluent with epandrium in lateral view. Epandrium with strong dorsal setae, each with brown spot at base. Surstylus consisting of anterior process and posteroapical process in lateral view, anterior process slightly long, tapering apically and slightly curved, posteroapical process slightly short, broad and truncated apically, with 1 median process on anterior margin; hypandrium long and broad, forward and stretch, Y-shaped; inner process poorly sclerotized. Gonopod long in lateral view, S-shaped distortion, with 1 long setulae basally and 3–4 long setulae at preapical distortion; phallus with 1 small curved sclerite at tip, vertical to phallus; phallus without apical concavity. Phallapodeme shorter than phallus.

Type material. Holotype ( CAUC): 1 ♂, CHINA, Yunnan Province: Jinping Yakou , 2006. V. 18, Junhua Zhang.

Distribution. China (Yunnan)

Remarks. The new species is very similar to Noeetomima nepalensis Stuckenberg from Nepal, but N. zhangae can be separated from the latter by the arista being white except yellow at base; hind femur having 2 strong anterior ventral setae; surstylus anterior process slightly longer than posterior process; gonopod S-shaped distortion. The new species is similar to Noeetomima thaiensis Sasakawa from Thailand, but N. zhangae can be separated from the latter by palpus being yellow except pale brown at tip; the fore femur having 4 strong posterior ventral setae and hind femur having 2 strong anterior ventral setae. The species is also similar to Noeetomima yunnanica Shi, Gaimari & Yang from Yunnan Province, but N. zhangae can be separated from the latter by the mid femur having 5 strong anterior setae; the abdomen having no spots, shiny brown; phallus having no apical concavity.

Etymology. Zhangae, Latin, named after Junhua Zhang, the collector of the holotype.

Figures

FIGURES 41–45. Noeetomima zhangae sp. nov. Male. 41. head, anterior view; 42. wing; 43. habitus, lateral view; 44. thorax, dorsal view; 45. abdomen, dorsal view.

FIGURES 46–50. Noeetomima zhangae sp. nov. Male. 46. syntergosternite and epandrium, lateral view; 47. epandrial complex, posterior view; 48. syntergosternite, anterior view; 49. aedeagal complex, ventral view; 50. aedeagal complex, lateral view. Scale 0.5 mm.