Cestrotus liui, Li, Shi, Yang, Ding & Gaimari, Stephen D., 2009

Li, Shi, Yang, Ding & Gaimari, Stephen D., 2009, Species of the genus Cestrotus Loew from China (Diptera: Lauxaniidae), Zootaxa 2009, pp. 41-68 : 57-60

publication ID	https://doi.org/ 10.5281/zenodo.185763
DOI	https://doi.org/10.5281/zenodo.6214043
persistent identifier	https://treatment.plazi.org/id/245E87ED-177D-0151-58C1-FA5DFEA6FEED
treatment provided by	Plazi
scientific name	Cestrotus liui
status	sp. nov.

Treatment

Cestrotus liui View in CoL sp.nov.

( Figs. 6 View FIGURES 2 – 8 , 13 View FIGURES 9 – 15 , 20 View FIGURES 16 – 22 , 43–47; Map 2)

Diagnosis. Face with a complex pattern consisting of irregular blackish brown spots, including a median longitudinal stripe. Antennal 1st flagellomere yellow with darker tip; arista short-plumose. Palpus yellow to yellowish brown. Scutellum with paired dark spots basally. All femora black on basal 2/3; all tibiae with a subbasal and apical black ring. Wing with complex pattern of brown markings and hyaline areas, including dark +-shaped mark surrounding hyaline margins of crossvein r-m, with hyaline area continuous from anterior to posterior margins surrounding this dark +-shaped mark; distal margin hyaline (at tips of cells r2+3, r4+5, and m1+2); hyaline area surrounding crossvein m-cu. Abdomen blackish brown to black, with grayish white pollinosity; female tergites 2–6 each with brownish yellow anterior margin.

Description. MALE. Body length 3.9–4.3 mm, wing length 3.7–4.1 mm. FEMALE. Body length 3.9–4.0 mm, wing length 3.8–3.9 mm.

FIGURES 43–47. Cestrotus liui sp. nov., ɗ terminalia. 43. protandrium and epandrial complex, lateral view; 44. protandrium, anterior view; 45. epandrial complex, posterior view; 46. aedeagal complex, ventral view; 47. aedeagal complex, lateral view.

Head ( Fig. 6 View FIGURES 2 – 8 ) yellow with dark markings. Face yellow, with a complex pattern consisting of irregular blackish brown markings, including an isolated median brown longitudinal stripe, pair of subantennal spots, and lower half of face with central U-shaped mark with lateral extensions dorsally. Frons yellow, as long as wide and parallel-sided, with pair of black velvety triangular spots in upper part; ocellar triangle grayish black. oc strong and longer than anterior or; anterior or reclinate, shorter than posterior one. Occiput yellow, with brownish median stripe extending to ocellar triangle. Gena yellow, with a brownish reniform spot; gena + subgena about 1/2 height of eye. Antenna yellow except scape blackish brown and tip of 1st flagellomere slightly darkened to orange; 1st flagellomere nearly 1.8 times longer than high; arista brown, short-plumose, with longest rays almost as long as 1/2 height of 1st flagellomere. Proboscis blackish brown, with yellow and dark hairs; palpus yellow to yellowish brown, with black setulae.

Thorax ( Fig. 13 View FIGURES 9 – 15 ) grayish yellow pollinose over brownish ground color. Mesoscutum with wide brown U–shaped band along margin, pair of brown longitudinally elliptic spots on transverse suture, pair of brown lateral spots behind suture, and a large central black trapeziform spot on posterior 1/3 with anterior margin bifurcated; 0+3 dc, acr in 3 somewhat irregular rows (6 rows total); prsc longer than anterior most dc. 1 anepst, 1 kepst. Scutellum with ground color yellow distally and darker mediobasally, grayish yellow pollinose, with pair of small brown basal spots extended from trapeziform spot on mesoscutum. Legs yellow; femora black on basal 2/3; tibiae each with subbasal and apical black ring; tarsomeres 3–5 brown. Fore femur with 3–4 pv and 6 pd, ctenidium with 16 short bristles; fore tibia with 1 preapical ad and 1 short apv. Mid femur with 5 a; mid tibia with 1 preapical ad and 2 strong apv. Hind femur with preapical ad, hind tibia with 1 preapical ad and 1 short apv. Wing ( Fig. 20 View FIGURES 16 – 22 ) 2.5 times longer than high; hyaline, with wide brown band through apical 1/2 of cell r1 confluent with subapical band through cells r2+3 and r4+5, forming an undulated stripe and extending to posterior margin; hyaline margin of crossvein r-m surrounded by dark +-shaped mark; hyaline margin of crossvein m-cu surrounded by 2 brown marks. Costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1+2) sections in proportion of 1.7: 0.7: 0.4; crossvein r-m beyond middle of discal cell; ultimate and penultimate sections of M1+ 2 in proportion of 1.3: 1.7; ultimate section of CuA1 about 1/9 of penultimate. Halter yellow.

Abdomen blackish brown to black, with grayish white pollinosity; female tergites 2–6 each with brownish yellow anterior margin. Male genitalia (Figs. 43–47): protandrium a complete ring, with several setae dorsally, with short process extending from ventral corners, thinnest ventrally; epandrium subrectangular in lateral view and U–shaped in posterior view, surstylus with thick conical outer process with 1–2 basal setae and several fine setulae on inner surface, and with thinner incurved subuliform inner process; cercus rounded, papillate, setose; hypandrium Y–shaped; gonopod and paramere reduced; aedeagus in ventral view with pair round basal processes and tapering and evenly curved to apex, with incision at tip, in lateral view apically curved; phallapodeme narrow, elongate, Y-shaped distally; ejaculatory apodeme small, simple.

Type material. Holotype ɗ ( CAUC), China, Yunnan Province, Baoshan City, Gaoligongshan National Natural Reserve, Baihualing (1500 m), 23. V. 2006, Xingyue Liu. Paratypes: CHINA. Hainan Province: 1 ɗ ( CAUC), Changjiang, Bawangling National Natural Reserve, Donger station (1000 m), 25. V. 2007, Junhua Zhang [19°16’N, 109°03’E]. Yunnan Province: 1 ɗ ( CAUC), 1 ɗ ( USNM), Baoshan City, Gaoligongshan National Natural Reserve, Baihualing (1500 m), 23. V. 2006, Yajun Zhu [25°27’N, 98°52’E]; 1 ɗ, 2 Ψ ( CAUC), 1 Ψ ( USNM), Baoshan City, Gaoligongshan National Natural Reserve, Baihualing (1500 m), 29. V. 2007, Xingyue Liu [25°27’N, 98°52’E]; 1 ɗ ( USNM) Baoshan City, Gaoligongshan National Natural Reserve, Baihualing (1500 m), 29. V. 2007, Yanlei Li [25°27’N, 98°52’E].

Distribution. (Map 2) China (Hainan, Yunnan).

Remarks. The new species is most similar to Cestrotus flavoscutellatus in the wing pattern, the marks on the scutellum, and the scutal pattern, but is easily differentiated from this species by the facial pattern (which lacks complex markings in C. flavoscutellatus , at most consisting of oblique marks in the lower corners), and the surstylar condition (e.g., in C. flavoscutellatus the outer process is thicker and the inner process is thinner). In the facial pattern, the new species has a median longitudinal stripe, in common with C. acuticurvus and C.

obtusus , but differs from both in the scutellar pattern (with elongate spots in C. acuticurvus and C. obtusus ), in the distal margin of the wing (with spots at the tips of cells r2+3 and r4+ 5 in C. acuticurvus and C. obtusus ), and in the condition of the outer surstylar lobe in lateral view (strongly triangular in C. acuticurvus and C. obtusus ).

Etymology. The species is dedicated to Mr. Xingyue Liu, who provided many specimens from his collection.