Dexia kurahashii Zhang et Shima 2010, sp. nov.
Creators: name: Zhang, Chun-Tian
name: Shima, Hiroshi
name: Chen, Xiao-Lin
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tachinidae
Dexia
Dexia kurahashii

description: Dexia kurahashii Zhang et Shima, sp. nov.   
Figs. 53−56  
 Diagnosis. Prementum about 6 times as long as wide; inner and outer thoracic vittae merged on postsutural scutum; 3 katepisternal setae; legs black; abdominal tergites 3 to 5 each with a triangular black marking; syntergite 1+2 with 1 pair of median marginal setae.   
 Description. Body length. 9.1−14.3 mm.   
 Male. Head with yellowish white pruinosity; frontal vitta brownish black; gena reddish brown; 1st flagellomere yellow, pedicel reddish to brown; palpus reddish yellow. Frons 0.16−0.17 times as wide as head width; frontal vitta widened anteriorly, wider than fronto-orbital plate; parafacial about 3 times as wide as 1st flagellomere; facial carina well developed, flattened apically; gena 0.4−0.5 times as wide as eye height; lower margin of face slightly protruding forward. Inner vertical seta 0.4−0.5 times as long as eye height, outer vertical seta hair-like, 0.6−0.7 times as long as inner vertical seta; ocellar seta slightly longer than inner vertical seta; 11−12 inclinate frontal setae, lowest one nearly level with base of scape; vibrissa inserted slightly above level of lower margin of face. Antenna falling short of lower margin of face by 0.6−0.8 length of 1st flagellomere; 1st flagellomere 3.5−4 times as long as pedicel, total width of arista including plumosity about 4 times as wide as 1st flagellomere. Prementum about 6 times as long as wide; palpus longer than antenna.   
 Thorax black in ground color, with dense yellowish gray pruinosity on scutum, gray pruinosity on pleura except for anterior portion of katepisternum and anepimeron; with 2 pairs of longitudinal black vittae on dorsum, inner and outer vittae merged on posterior half of presutural scutum; scutellum reddish yellow on apical 3/5. All thoracic hairs black; proepisternum bare; postpronotal lobe with 3 setae nearly in a straight line; 1 presutural and 2 postsutural acrostichal setae; 2 presutural and 3 postsutural dorsocentral setae; 2 postsutural intra-alar setae; 3 supra-alar setae, 1st one about 1/4 as long as second, shorter than intra-alar seta; 3 katepisternal setae. Wing hyaline, yellowish at base, brown along veins C, R 1, R 2+3, and R 4+5; tegula and basicosta black; lower calypter yellowish. Costal spine about as long as crossvein r-m. Relative lengths of 2nd, 3rd, and 4th costal sectors approximately 5.5:12:5; vein M from dm-cu crossvein to its bend about 3 times distance between the bend and wing margin, appendix short; cell r 4+5 narrowly open at wing margin; last sector of vein CuA 1 about 1/2 as long as dm-cu crossvein. Lower calypter with short fringe on outer margin. Legs black, pulvilli brownish. Mid tibia with 2−4 posterodorsal setae; hind tibia with a row of 3−5 anterodorsal, 2 posterodorsal and 2 ventral setae.   
 Abdomen long ovate, translucent yellow, black on median excavation and anterolateral portion of syntergite 1+2 and a triangular black median marking on posterior 1/4−3/4 of each tergite; grayish white pruinosity on anterior margin of tergite 3, anterior 1/4−1/5 of tergite 4 and entire tergite 5. Syntergite 1+2 with 1 pair of median marginal and 1 lateral marginal setae; tergite 3 with 1−2 pairs of fine median discal, 1 pair of median marginal and 1−2 lateral marginal setae; tergites 4 and 5 each with 1−2 pairs of widely apart median discal and a row of marginal setae. Male terminalia. Sternite 5 subsquare, posterior lobe blunt apically; apical half of cerci slender and pointed at apex; surstylus apically narrowed and blunt; pregonite short, slightly bent at apex; basiphallus longer than postgonite and distiphallus long and plate-like.   
 Female. Frons widened anteriorly, about 1/3 head width at narrowest point; 6−7 inclinate frontal setae; 2 strong proclinate orbital setae and 1 small outclinate prevertical seta; inner vertical seta about 2/3 eye height, twice as long as outer vertical setae. Mid tibia with 2 anterodorsal, 2 posterodorsal setae. Abdomen ovate, reddish yellow, a triangular black marking on posterior 3/4 of tergite 3, 1/2 of tergite 4 and 1/4 of tergite 5; grayish white pruinosity on anterior 1/4−1/2 of tergite 3, 1/2−2/3 of tergite 4, and 3/4−4/5 of tergite 5. Other characters as in male.   
 Type material. Holotype male, INDONESIA, Suranadi, 100 m, Lombok, 18−21.xii.1973, H. Kurahashi (BLKU). Paratypes. INDONESIA. 1 female, Beratan, 1000 m, Bali Is., 15.xii.1973, H. Kurahashi. 14 males, 18 females, Suranadi, Sesaot and Sembella, 100−300m, Lombok, 18−22.xii.1973, H. Kurahashi & S. Shinonaga. 3 males, Wolowaru, 600 m, Flores, 20.xii.1973, H. Kurahashi. 2 males, Senaru, 750 m, Lombok I., 30.ix.2000, T. Tachi. 1 male, Pusuk Pass (monkey forest), 260 m, Lombok I., 1.x.2000, T. Yamauchi (BLKU).   
 Etymology. Specific name is dedicated to Dr. H. Kurahashi for his contribution to systematics of Diptera.   
 Distribution. Indonesia (Bali, Flores, Lombok).   
 Remarks. This new species closely resembles D. longipes, but differs from it in having black hairs on thoracic pleura and abdominal sternite 1, outer and inner black vittae merged on postsutural scutum, abdominal tergites each with a large triangular black marking.
description: Published as part of Zhang, Chun-Tian, Shima, Hiroshi & Chen, Xiao-Lin, 2010, A review of the genus Dexia Meigen in the Palearctic and Oriental Regions (Diptera: Tachinidae) 2705, pp. 1-81 in Zootaxa 2705 on pages 45-47