Cestrotus heteropterus Li, Yang & Gaimari, 2009, sp.nov.
Creators: name: Li, Shi
name: Yang, Ding
name: Gaimari, Stephen D.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Cestrotus
Cestrotus heteropterus

description: Cestrotus heteropterus sp.nov.
(Figs. 5, 12, 19, 38–42; Map 1)
Diagnosis. Face with two pairs of small indistinct brownish subantennal spots. Antennal 1st flagellomere white; arista long-plumose. Palpus tinged yellow. Scutellum yellow, with paired dark spots basally and paired dark spots distally. Fore and mid femora each with brown basal and subapical ring, hind femur with brownish subapical ring only; fore and mid tibiae each with three brown rings, hind tibia with brown subbasal and apical ring. Wing with discal cell entirely shaded brown except for hyaline spot below crossvein r-m; cell r2+3 with distal margin with shaded brown spot at tip; cell r4+5 hyaline at tip, and with 2 distinct hyaline spots; lacking +-shaped brown mark surrounding crossvein r-m. Abdomen blackish brown (sometimes tergites 2–6 with indistinct yellow margin or lateral spots).
Description. MALE. Body length 3.3–3.8 mm, wing length 3.4–3.7 mm. FEMALE. Body length 3.7–4.0 mm, wing length 3.7–3.8 mm.
Head (Fig. 5) white with few dark markings. Face white, at most with pair of small indistinct brownish subantennal spots. Frons white, wider than long and parallel-sided, with pair of velvety brownish triangular spots on upper part, connected through brown ocellar triangle, 2 rows short setulae between ocellar triangle and vertex. oc strong and longer than anterior or; anterior or reclinate, slightly shorter than posterior one. Gena white, with a small brown round spot; gena + subgena about 1/2 height of eye. Antenna white except scape brown (sometimes upper margin of 1st flagellomere brown at aristal base), 1st flagellomere nearly 1.7 times longer than high; arista brown with yellow base, long plumose, with longest rays slightly longer than height of 1st flagellomere. Proboscis yellow, with yellow and dark hairs; palpus white, with black setulae.
Thorax (Fig. 12) grayish white pollinose over blackish brown ground color. Mesoscutum with a pair of brown elliptic transverse spots along transverse suture, pair of brown lateral spots behind suture, and a central brown quadrate spot on posterior 1/3; 0+3 dc, each with brown basal spot, acr in 3 somewhat irregular rows (6 rows total); prsc shorter than anterior most dc. 1 anepst, 1 kepst. Scutellum yellowish orange, with 2 distal and 2 basal brownish spots. Legs yellowish; fore and mid femora each with brown basal and subapical ring, hind femur with brownish subapical ring only; fore and mid tibiae each with three brown rings (sometimes fore tibiae only with basal and apical ring), hind tibia with brown subbasal ring; tarsomeres brownish yellow. Fore femur with 3 pv and 5 pd, ctenidium with 16 short bristles; fore tibia with 1 preapical ad. Mid femur with 5–6 a; mid tibia with 1 preapical ad and 2 strong apv. Hind femur with row of 7 av; hind tibia with 1 short apv, but without preapical ad. Wing (Fig. 19) 2.5 times longer than high; hyaline with wide brown central area with hyaline markings and spots; cell r2+3 with upside-down-U shaped spot near middle and distal margin with brown spot at tip; r3+4 brown except for small hyaline spot basally, 2 hyaline spots, and distal margin hyaline at tip; discal cell brown except for hyaline spot below crossvein r-m; crossvein dm-cu with hyaline stripe expanding to larger spot ventrally. 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 2.1: 0.6: 0.3; crossvein r-m beyond middle of discal cell; ultimate and penultimate sections of M1+ 2 in proportion of 1.1: 1.7; ultimate section of CuA1 about 1/9 of penultimate. Halter tinged yellow to brownish yellow.
Abdomen blackish brown (sometimes tergites 2–6 with indistinct yellow anterior margin or lateral spots). Male genitalia (Figs. 38–42): protandrium a complete ring, with dense minute hairs dorsally, with lateral process along spiracle, thinnest ventrally; epandrium narrow, U-shaped in posterior view, with 2–3 bristles on anterior apical margin; surstylus with narrow tapering and incurved outer process and longer incurved inner process; cercus rounded, papillate, setose; hypandrium Y–shaped; gonopod and paramere reduced; aedeagus in ventral view tapering and evenly curved apically, with two triangular basal processes and a pair of lateral spines, in lateral view evenly curved to sharpened distal tip; phallapodeme narrow, elongate, Y-shaped distally; ejaculatory apodeme small, simple.
Type material. Holotype ɗ (CAUC), China, Yunnan Province, Mengla, Lushilin (600 m), 21. IV. 2007, Wenliang Li [21°55’N, 101°13’E]. Paratypes: CHINA. Yunnan Province: 2 ɗ, 1 Ψ (CAUC), 2 ɗ, 1 Ψ (USNM), same data as holotype; 1 Ψ (CAUC), Mengla, Menglun Zhiwuyuan (570 m), 20. IV. 2007, Wenliang Li [21°29’N, 101°33’E]; 1 ɗ (CAUC), Mengyang, Yexianggu (600 m), 17. IV. 2007, Wenliang Li [22°04’N, 100°53’E]; 1 ɗ (CAUC), Mengyang, Yexianggu (600 m), 5. V. 2007, Hui Dong [22°04’N, 100°53’E]. THAILAND. Chaiyaphum: 1 Ψ (USNM), Pa Hin Ngam National Park, creek at Tung Dok Grajeaw (750 m), 6–12. VII. 2006, Kratae Sa-nog & Buakaw Adnafai, ex. Malaise trap (T329) [15°38.391'N 101°23.609'E]; 1 Ψ (USNM), Pa Hin Ngam National Park, dry evergreen forest at waterfall (430 m), 12–13. XI. 2006, Kratae Sanog & Buakaw Adnafai, ex. pan traps (T1024) [15°34.802'N 101°25.990'E]; 1 ɗ (QSBG), Pa Hin Ngam FIGURES 38–42. Cestrotus heteropterus sp. nov., ɗ terminalia. 38. protandrium and epandrial complex, lateral view; 39. protandrium, anterior view; 40. epandrial complex, posterior view; 41. aedeagal complex, ventral view; 42. aedeagal complex, lateral view.
National Park, ecotone between mixed deciduous/dry dipterocarp forest (700 m), 5–11. VIII. 2006, Kratae Sanog & Buakaw Adnafai, ex. Malaise trap (T440) [15°38.100'N 101°23.857'E]; 1 ɗ, 1 Ψ (USNM), Pa Hin Ngam National Park, mixed deciduous forest (419 m), 28. XI. – 4. XII. 2006, Kratae Sa-nog & Buakaw Adnafai, ex. Malaise trap (T1042) [15°34.686'N 101°26.082'E]. Chonburi: 1 ɗ (USNM), 1 ɗ, 1 Ψ, (ZMMU), Chan Ta Then, river (ca. 300 m), 24. XI. 2006, Nikita Vikhrev [ca. 13°14’N, 101°03’E]. Loei: 1 Ψ (QSBG), Phu Kradueng National Park, Huay Ta Hack (280 m), 30. VIII. – 6. IX. 2006, Sutin Khonglasae, ex. Malaise trap (T491) [16°51.958'N 101°50.668'E]; 1 ɗ (USNM), Phu Ruea National Park, Huay Taey ditch (1233 m), 5–12. VIII. 2006, Nukoonchai Jaroenchai, ex. Malaise trap (T526) [17°30.128'N 101°20.339'E]; 1 Ψ (QSBG), Phu Ruea National Park, office (860 m), 8–9. VII. 2006, Patikhom Tamtip, ex. pan traps (T306) [17°28.826'N 101°21.330'E]. Phetchabun: 1 ɗ (QSBG), Khao Kho National Park, mixed deciduous forest at Ta Phol river (242 m), 5–12. XI. 2006, Somchai Chachumnan & Saink Singhtong, ex. Malaise trap (T968) [16°32.561'N 101°02.479'E]; 1 ɗ (USNM), Khao Kho National Park, nursery (520 m), 12–19. X. 2006, Somchai Chachumnan & Saink Singhtong, ex. Malaise trap (T808) [16°52.581'N 101°08.060'E]; 1 ɗ (QSBG), Khao Kho National Park, view point at Klump stream (246 m), 5–12. IX. 2006, Somchai Chachumnan & Saink Singhtong, ex. Malaise trap (T588) [16°39.120'N 101°07.810'E]. Phitsanulok: 1 Ψ (QSBG), Thung Salaeng Luang National Park, mixed deciduous forest (479 m), 11–18. VIII. 2006, Pongpitak Pranee, ex. Malaise trap (T568) [16°50.319'N 101°51.792'E]. Sakon Nakhon: 1 Ψ (QSBG), Phu Phan National Park, behind Huay Wien Prai Forest Unit (318 m), 21–27. VIII. 2006, Sailom Tongboonchai, ex. Malaise trap (T512) [17°06.810'N 104°00.318'E]; 1 ɗ (USNM), Phu Phan National Park, behind Huay Wien Prai Forest Unit (376 m), 8–9. VIII. 2006, Vinlon Khongnara, ex. pan traps (T502) [17°06.847'N 104°00.302'E].
Distribution. (Map 1) China (Yunnan), Thailand.
Remarks. The new species is similar to Cestrotus frontalis from India in several head characteristics, such as the white face and frons, the shape and color of the velvety brownish spots on the frons, and the dark distal tip of wing cell r2+3. The new species can be easily differentiated by the different thoracic color pattern (e.g., in C. frontalis the scutellum is shiny black, there is a dark median vitta, there are no transverse spots on the transverse suture, and the dc are surrounded by silvery gray basal spots) and the wing pattern (e.g., in C. frontalis cell r4+5 and the discal cell are more extensively hyaline). The new species can be differentiated from the other Chinese species by the lack of dark markings on the lower part of the face, the transverse brown spots along the transverse suture (round or longitudinally elongated in the other species), and in the wing pattern and genitalic characters (e.g., protandrium with dense minute hairs dorsally).
Etymology. Greek, heteros, meaning different + pteron, meaning wing; referring to the unique wing pattern of this species relative to the other species of Cestrotus; a noun in apposition.
description: Published as part of Li, Shi, Yang, Ding & Gaimari, Stephen D., 2009, Species of the genus Cestrotus Loew from China (Diptera: Lauxaniidae), pp. 41-68 in Zootaxa 2009 on pages 54-57, DOI: 10.5281/zenodo.185763