Sarcophaga (Hoa) flexuosa Ho

Zhang, Dong, Zhang, Ming, Pape, Thomas, Gu, Cai-Wei & Wu, Wei, 2013, Sarcophaga (Hoa) flexuosa Ho (Diptera: Sarcophagidae): association of sexes using morphological and molecular approaches, and a redefinition of Hoa Rohdendorf, Zootaxa 3670 (1), pp. 71-79 : 73-76

Sarcophaga (Hoa) flexuosa Ho

Figs. 1–5 .

Sarcophaga flexuosa Ho, 1934: 25 . Holotype male (originally given as deposited in the Fan Memorial Institute of Biology, not recovered). Type locality: China, Beijing.

Hoa flexuosa : Rohdendorf (1937: 291); Koe (1975: 72); Fan (1992: 670); Fan & Pape (1996: 250); Ye (1998: 1597); Ji et al. (2011: 478).

Sarcophaga (Hoa) flexuosa: Pape (1996: 337) ; Zhang & Zhang (2013: 73).

Female. Body length: 5.0– 6.9mm.

Head: Eye bare. Fronto-orbital plate, parafacial and postocular strip black with silvery gray pollinosity; postocular bristles in three rows; parafacial with one row of fine setae. Frontal vitta black, about 1.60x as broad as fronto-orbital plate at its narrowest point; frons about 0.30x as broad as head width at vertex; frontal row of 8 or 9 bristles; outer vertical bristle differentiated from postocular setae and about 0.80x as long as inner vertical bristle, one reclinate and two proclinate orbital bristles. Ocellar bristles one pair, developed. Gena background color black, with black bristles and silvery gray pollinosity, height about 0.27x eye height in lateral view. Antenna blackish brown, not reaching the level of vibrissal insertion, first flagellomere length about 2.30x as long as pedicel; arista long plumose in basal half. Palpus black, expanded in distal part. Thorax: Scutum pollinosity silvery gray with three black dorsal vittae. Chaetotaxy: acrostichals 3(4)+2, dorsocentrals 3+4, intra-alars 1+3, supra-alars 2, postpronotals 3, postalars 2, notopleurals 4, scutellum with short bristles 1 (discal), basals 1, subapicals 1. Pleuron with meropleurals 6 or 7, katepisternal bristles 3 (1:1:1), prosternum and metasternum with fine setae, proepisternum bare, proepimeron with upper depressed part bare, lower part with fine setae, postalar wall with one seta. Wings hyaline, slightly yellow at base. R1 bare, subcostal sclerite and basicosta yellow and bare, tegula black, costal spine not differentiated, 3 or 4 ventral and dorsal setae at node of R4+5-R2+3, halter yellow. Legs dark, with grayish black pollinosity; forefemur with several bristles along posterodorsal and ventral margins, foretibia with one posterior and three anterodorsal bristles, with one row of posterodorsal bristles; midfemur with one posterior and two posterodorsal bristles, with one anteroventral and one ventral row of bristles, midtibia with one posteroventral and one ventral bristles; hindtibia with two anteroventral bristles, with several bristles along anterodorsal (three strong) and posterodorsal (two strong) margins. Abdomen: Oval; tergite 3 without median marginals, tergite 4 with 1 pair of median marginals and 4 strong lateral marginal bristles. Terminalia: tergite 6 nondivided, sternite 5 quadrilateral in ventral view, sternite 8 represented by a membranous fold, hypoproct welldeveloped but not particularly sclerotized ( Fig. 5 B).

Male. Body length: 4.5–8.7mm.

Head: Frontal vitta about 2.30x as broad as fronto-orbital plate at its narrowest point; frons about 0.20x as broad as head width at vertex; frontal row of 11–13 bristles; outer vertical bristle not differentiated from postocular setae, one reclinate and no proclinate orbital bristles, one upper orbital bristles. First flagellomere length about 2.00x as long as pedicel. Palpus brown, slightly expanded in distal part. Thorax: Chaetotaxy: acrostichals 3(2)+1, scutellum with short bristles 2 (apical and discal), basals 1, subapicals 1. Pleuron with meropleurals 8–10, postalar wall with two setae. Legs: forefemur with several bristles along dorsal, posterodorsal and posteroventral margins, foretibia with three anterodorsal, two posterodorsal and one posterior bristles; midfemur with one posterodorsal and one posterior bristles, midtibia with one posteroventral and one ventral bristles. Abdomen: Long oval; tergites 3 and 4 both with 1 pair of median marginal bristles, tergite 9 black, sternite 5 with dense bristles along the inner margin ( Fig. 5 A). Terminalia: Cercus gently curved distally and with an apical notch ( Fig. 3 B). Cerci in posterior view symmetrical and with a median common projection, with the tip of each cercus slightly narrow. Surstylus almost triangular but with slightly convex anterior margin ( Fig. 3 B). Pregonite about as long as postgonite, almost straight, with very shallow concavity on basal margin, postgonite straight with curved tip and one long bristle near middle of ventral margin ( Fig. 3 B). Vesica small ( Fig. 3 B & Fig. 4 A, B, D). Juxtal extensions developed, with two large hooks in lateral view ( Fig. 3 B & Fig. 4 F). Median stylus smoothly rounded and just visible in lateral view, with spinose proximal surface ( Fig. 3 B & Fig. 4 A, B, C, F); lateral stylus slender, with a single row of recurving teeth in the distal half and situated under the arched juxta ( Fig. 3 B & Fig. 4 F, G); juxta membranous distally, partly recurving, extending beyond the lateral styli, and with a U-shaped apical emargination that leaves a pair of slender projections ( Fig. 4 F). Other morphological characteristics are the same as for the female.

Material examined. CHINA: 6 males (paratypes), Beijing, 1932–1933, C. Ho (ZMCAS); 5 males, 3 females, Beijing: Campus of Beijing Forestry University, 2–17.v.2012, M. Zhang (MBFU); 1 male, Shandong: Weifang, 16.vii.2012, X.H. Liu (MBFU).

Distribution. China (Beijing, Guizhou, Hebei, Henan, Jiangsu, Liaoning, Shaanxi, Shandong, Shanghai). Remarks on type material. Ho (1934: 27) originally stated that Sarcophaga flexuosa was “Described from 45 males from Peiping (C. Ho, 1932-33)” and with a “ Holotype: in F. M. I. B., male from Peiping”. This depository, the Fan Memorial Institute of Biology, later developed into the Institute of Zoology, Chinese Academy of Sciences (IZCAS), and ZMCAS is the museum of IZCAS. A thorough search of the ZMCAS by the first author revealed only six paratypes of S. flexuosa , and the holotype was not recovered. It is likely that Professor Ho brought paratypes to other Chinese institutions, and he may also have exchanged material with international colleagues.

Figures

FIGURE 1. Sarcophaga (Hoa) flexuosa Ho, 1934. A. Male body, lateral view. B. Female body, lateral view. Scales = 2.00 mm.

FIGURE 2. Sarcophaga (Hoa) flexuosa Ho, 1934. A. Male head, anterior view. B. Female head, anterior view. C. Male head, left anterolateral view. D. Female head, left anterolateral view. E. Male abdomen, dorsal view. F. Female abdomen, dorsal view. Scales for A – D = 0.50 mm. Scales for E & F = 1.00 mm.

FIGURE 3. Male terminalia, lateral view. Sarcophaga basiseta Baranov, 1931 (adapted from Baranov, 1931). B. Sarcophaga (Hoa) flexuosa Ho, 1934.

FIGURE 4. Sarcophaga (Hoa) flexuosa Ho, 1934. A. Distiphallus, anterior. Scale = 200 µm. B. Median stylus and vesica. Scale = 100 µm. C. Median stylus, anterior. Scale = 25 µm. D. Vesica. Scale = 25 µm. E. Basal part of vesica. Scale = 15 µm. F. Distiphallus, lateral. Scale = 100 µm. G. Lateral stylus. Scale = 50 µm. Abbreviations: H, harpes; J, juxta; JE, juxtal extension; LS, lateral stylus; MS, median stylus; PT, phallic tube; V, vesica.

FIGURE 5. Sarcophaga (Hoa) flexuosa Ho, 1934. A. Male sternite 5. Scale = 0.50 mm. B. Female terminalia, posteroventral view. Scale = 0.25 mm. C. Female sternites 1 to 4, ventral view. Scale = 0.50 mm.