Noeetomima chinensis, Shi, Li, Gaimari, Stephen & Yang, Ding, 2013

Shi, Li, Gaimari, Stephen & Yang, Ding, 2013, Four new species of Noeetomima Enderlein (Diptera: Lauxaniidae), with a key to world species, Zootaxa 3746 (2), pp. 338-356 : 341-345

Noeetomima chinensis sp. nov.

( Figs. 1 , 5–12 )

Diagnosis. Arista white except yellow basally, pubescent. Palpus yellow except slightly blackish brown at tip. Mesoscutum with presutural dorsocentral seta before horizontal level of presutural acrostichal seta. Scutellum shiny blackish brown. Fore femur with 4–5 strong posteroventral setae and hind femur with 2 strong anteroventral setae on apical 1/2. Wing with 7 white radiating bands along margin between tips of R2+3 and CuA1, short white irregular lines in brown central area and posterior margin strongly undulating. Male genitalia: surstylus consisting of long furcated anterior process with setulae and short truncate posterior apical process in lateral view.

Description. MALE. Body length 2.5–3.0 mm, wing length 3.0– 3.6 mm. FEMALE. Body length 2.3–3.3 mm, wing length 3.1–3.9 mm.

Head ( Figs. 6, 7 ) pale yellow. Face with pale brown V-shaped median spot, pale brown groove near ventral margin and brown median spot on 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 with pair of narrow brownish median stripes, terminating before inner vertical seta. Gena with blackish brown spot near posterior ventral margin of eye, about 1/5 height of eye. Occiput with greyish pruinosity. Antenna with flagellomere 1 pale brown on dorsal margin and blackish brown on ventral 1/3–1/2, about 1.8 times longer than high; arista white except yellow basally, pubescent. Brown triangular spot present between eye and antenna. Eye without concavity on posterior ventral margin. Proboscis with brownish yellow tinge, with yellowish and blackish setulae; palpus yellow except slightly blackish brown at tip with blackish setulae.

Thorax ( Figs. 5, 6 ) brown, with yellowish grey pruinosity. Mesoscutum with pair of narrow brown median stripes extending from anterior margin to presutural acrostichal seta, posterior margin of postpronotum surrounded by brown line, 3–4 brown round spots scattered between dorsocentral and supraalar setal rows, pair of small black triangular posterior marginal spots extending to scutellum; presutural dorsocentral seta before horizontal level of presutural acrostichal seta, anteriormost postsutural dorsocentral seta near transverse scutal suture and anteriormost postsutural acrostichal seta on transverse scutal suture; prescutellar acrostichal seta shorter than anteriormost postsutural dorsocentral seta. Anepisternum and katepisternum brown with greyish pruinosity; anepisternum with 2 brown spots on upper margin and brown spot on lower margin, 1 anepisternal seta and 3–4 short setulae; katepisternum with brown irregular spot at base of each of 2 katepisternal setae. Scutellum shiny blackish brown, with greyish white or greyish yellow pruinosity on basal 1/4–1/3 and dense microtrichia on apical 1/4. Legs yellow except all apical tarsomeres brown; femur with brown subapical spot on inner side corresponding to subbasal ring on tibia. Fore femur with 4–5 strong posteroventral setae (only few males with 5) and 6 posterodorsal setae; fore tibia with 1 long preapical anterodorsal seta and 1 short apicoventral seta. Mid femur with 5 anterior and 1 apicoposterior setae; mid tibia with 1 strong preapical anterodorsal seta and 1 strong apicoventral seta (1 weak apicoventral seta present in a few individuals). Hind femur with 2 strong anteroventral setae (sometimes 1 is weak, or 1 weak seta present in addition to 2 strong setae) on apical 1/2 and 1 preapical anterodorsal seta; hind tibia with 1 preapical anterodorsal seta and 1 short apicoventral seta. Wing ( Fig. 1 ) with 7 white radiating stripes along margin between tips of R2+3 and CuA1; short white irregular lines in brown central area; posterior margin strongly undulating; 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 3.6: 1: 1; r-m beyond middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1: 1.7; ultimate section of CuA1 about 1/10 of penultimate. Halter pale yellow, except knob brown.

Abdomen: Female tergites 2–3 with median greyish white spot on posterior margin (in male, tergite 3 without median spot on posterior margin); female and male tergites 4–6 each with greyish white median spot on anterior margin, tergites 2–6 with 2–3 pairs of greyish white lateral spots and 4–5 pairs of setae on posterior margin. Male genitalia ( Figs. 8–12 ): syntergosternite 7+8 and epandrium yellow; syntergosternite 7+8 slender, circular with Vshaped ventral incision and pair of triangular ventral processes, confluent with epandrium on basal 1/2; epandrium with 4–6 rows of dorsal setae, each with brownish basal spot; surstylus consisting of long furcated anterior process with setulae and short truncate posterior apical process in lateral view; hypandrium long and broad, trapezoidal, lateral arms tapering to anterior edge, medial arm broad and tapering anteriorly; postgonite long, furcated apically, consisting of triangular apical process and digitiform apical process with 3 long setulae in lateral view; phallus nearly S-shaped in lateral view, consisting of the following four parts: V-shaped inner sclerite with an acuate triangular process; pair of lateral sclerites, narrow basally and wide apically, and pair of acinaciform median processes, pair of acuate triangular processes, pair of slender membranous processes, acuate and furcated basally and pair of acuate apicodorsal processes; slender dorsal sclerite, separated from lateral sclerites on subbasal point, with hook-like dorsal process, round apically in lateral view; small apical incision on broad apical membrane area in ventral view. Phallapodeme long, projecting anteriorly, nearly equal to length of hypandrium in lateral view. Cerci diminutive.

Type material. Holotype ♂ ( Figs. 5–7 ) (CAUC), CHINA, Zhejiang Province: Longquan, Fengyangshan National Nature Reserve, Huangmaojian (1929 m), 28°04′N, 119°08′E, 29. VII. 2007, Yajun Zhu. Paratypes: CHINA, Zhejiang Province: 1 ♂, 2 ♀ (CAUC), Longquan, Fengyangshan National Nature Reserve, Huangmaojian (1929 m), 28°04′N, 119°08′E, 27. VII. 2007, Yajun Zhu; 1 ♂, 5 ♀ (CAUC), Longquan, Fengyangshan National Nature Reserve, Huangmaojian (1929 m), 28°04′N, 119°08′E, 29. VII. 2007, Yajun Zhu; 2 ♀ (CAUC), Longquan, Fengyangshan National Nature Reserve (1929 m), 28°04′N, 119°08′E, 30. VII. 2007, Yajun Zhu; 1 ♂, 1 ♀ (CAUC), Longquan, Fengyangshan National Nature Reserve, Datianping (900–1220 m), 28°04′N, 119°08′E, 29. VII. 2007, Yajun Zhu; CHINA, Guizhou Province: 1 ♂ (CAUC), Fanjingshan, Huixiangping (1800 m), 27°83′N, 108°81′E, 1. VIII. 2001, Shujuan Li.

Distribution. China (Guizhou, Zhejiang Provinces).

Remarks. The new species is very similar to Noeetomima nepalensis Stuckenberg from Nepal in the following characters: antennal flagellomere 1 pale yellow except pale brown on dorsal and ventral margins; arista white except yellow basally, pubescent; mesoscutum with a pair of narrow brown median stripes extending from anterior margin to presutural acrostichal seta; hind femur with 2 strong anteroventral setae; wing predominantly brown, with 7 white radiating bands along margin between tips of R2+3 and CuA1, short white irregular lines in a brown central area, undulating posterior margin. However, N. chinensis can be separated from N. nepalensis by the eye having a straight posterior ventral margin; the junction of the anepisternum and katepisternum having no brown spot; the scutellum having no greyish brown pruinose spots; the surstylus consisting of a long furcated anterior process with setulae and a short truncate posterior apical process in lateral view; and the postgonite having 3 long setulae on a digitiform apical process. In N. nepalensis , the eye has a concavity on the posterior ventral margin; the junction of the anepisternum and katepisternum has a brown subrectangular spot; the scutellum has 3 greyish brown pruinose spots; the surstylus consists of a long bar-like anterior process with setulae and a short digitiform posterior process in lateral view; and the postgonite has short setae between 2 apical processes (Stuckenberg, 1971b). This new species is also similar to N. thaiensis Sasakawa from Thailand in the wing pattern, but N. chinensis can be separated from the latter by the palpus being yellow except slightly blackish brown at tip, the fore femur having 4–5 posteroventral setae and the hind femur having 2 anteroventral setae. In N. thaiensis , the palpus is black, the fore femur has 3 posteroventral setae and the hind femur has only 1 anteroventral seta (Sasakawa, 1987).

Etymology. The specific epithet reflects the distribution of this species in China.

Figures

FIGURES 1 – 4. Wings. 1. Noeetomima chinensis sp. nov.; 2. N. jinpingensis sp. nov.; 3. N. tengchongica sp. nov.; 4. N. yunnanica sp. nov.

FIGURES 5 – 7. Noeetomima chinensis sp. nov. Holotype male. 5. habitus, lateral view; 6. thorax, dorsal view, and head, lateral view; 7. head, anterolateral view.

FIGURES 8 – 12. Noeetomima chinensis sp. nov. Male. 8. syntergosternite 7 + 8 and epandrium, lateral view; 9. syntergosternite 7 + 8, anterior view; 10. epandrial complex, posterior view; 11. phallus complex, ventral view; 12. phallus complex, lateral view. Scale bar = 0.1 mm.