Spiriverpa lunulata (Zetterstedt)

Webb, Donald W., 2005, A revision of the Holarctic genus Spiriverpa Irwin and Lyneborg (Diptera: Therevidae: Therevinae), Zootaxa 816, pp. 1-56 : 31-34

Spiriverpa lunulata (Zetterstedt)

lunulata Zetterstedt (1838:523 orig. desc.) ( Thereva ); Irwin and Lyneborg (1981a:214 type sp. desig., comb. change, 215:Figs. 72– 78 male terminalia , Fig. 79 ant.), Lyneborg (1989:24 cat.) ( Spiriverpa ). Type locality Lapponia Norvegica. Holotype female in NHRS, by monotypy. clausa Frey (1911:55 orig. desc.) ( Thereva , as variety of lunulata ); Lyneborg (1989:24 cat.) ( Spiriverpa ). Type locality Finland. Syntypes in MZHF.

Diagnosis. Like Spiriverpa albiceps and S. argentata in having the male ommatidia smaller ventrally and laterally; halter knob dark reddish brown; inner gonocoxal setae dark reddish brown; ventral apodeme extending to anterior margin of dorsal apodeme ( Fig. 41 ); female common duct subequal or shorter than furca (as in Fig. 9 ); spermathecal ducts originating from common duct (as in Fig. 9 ). Like S. argentata in having the male epandrium dorsal view ( Fig. 36 ) not constricted posteriorly, lateral view ( Fig. 37 ) directed posteriorly; the male tergite 8 with setae across posterior margin ( Fig. 36 ); and the inner gonocoxal process ( Fig. 39 ) ending beyond posterior margin of gonocoxite. It differs from S. argentata in having the posterior margin of epandrium not yellow, glossy, glabrous ( Fig. 36 ); and the female abdomen dark reddish brown, glossy with gray pruinescence over tergites 1 and 5–7, across posterior of tergites 2–4, with tergite 8 glossy.

Redescription of male.

Morphometric variation (n=10).

Body Length 8.4–9.9, 9.2 mm

Head. Length 1.12–1.50, 1.24 mm. Ommatidia smaller ventrally and laterally. Frons pruinescence silver; setae white. Antenna dark brown, scape and pedicel pruinescence gray, dense; Antenna/head length 0.61–0.92, 0.78; scape length 0.32–0.44, 0.35 mm, length/width 1.7–2.4, 2.1, scape/pedicel length 2.8–3.7, 3.3, scape/flagellum width 0.88– 1.25, 1.07, setae on scape white, elongate; pedicel length 0.09–0.12, 0.11 mm, length/ width 0.6–0.9, 0.7; flagellum length 0.46–0.56, 0.50 mm, length/width 2.7–3.5, 3.1, flagellum/scape length 1.3–1.6,1.4. Parafacial setae white. Maxillary palpus pale brown, pruinescence gray, dense; length 0.52–0.64, 0.57 mm, length/width 5.4–10.7, 8.2; setae white.

Thorax. Macrosetae 3–4 np, 2 sa, 1 pa, 2 dc, 2 sc. Mesonotum with dorsocentral vitta black, dull, pruinescence gray with faint black median stripe on posterior half; dorsolateral vitta dull black, pruinescence gray, vittae separated by silver pruinescent stripe; setae white, intermixed with black setae. Setae on postpronotal lobe white. Pleuron and scutellum pruinescence gray, dense; setae white. Wing. Length 6.7–8.2, 7.5 mm, length/width 2.9–3.6, 3.1; membrane opaque; pterostigma pale yellowish brown; cell m3 open widely or closed at wing margin (on same specimen). Halter dark brown, apical margin of knob paler. Legs. Coxal setae white. Femora dark reddish brown, pruinescence gray; ventral filiform setae white; av 0:0:7, pv 0:0:2. Tibiae dark yellow, becoming reddish brown apically. Tarsi dark reddish brown.

Abdomen. Cuticle dark reddish brown, pruinescence gray, dense; dorsal and lateral setae white. Terminalia . Tergite 8 ( Fig. 36 ), setae pale yellow with scattered setae across posterior margin. Sternite 8 ( Fig. 38 ), anterior margin expanded laterally, sides tapered posteriorly; setae pale yellow. Epandrium ( Fig. 36 ), posterior margin lacking yellow glabrous margin, posterolateral margin broadly pointed; lateral view ( Fig. 37 ) rectangular, tapered posteriorly to broad medial point. Gonocoxite ventral view ( Fig. 38 ), tapered posteriorly to broad, truncate margin, setae pale yellow with stout black setae medially and posteriorly; lateral view ( Fig. 39 ) rectangular, tapering posteriorly to truncate margin, inner gonocoxal process yellowish brown, narrow, apex clavate, ending distal to posterior margin of gonocoxite, apical setae dark brown; ventral lobe ( Fig. 38 ) with fine ventral setae. Gonostylus lacking basodorsal spines. Aedeagus with ventral apodeme ( Fig. 41 ) broadened anteriorly, anterior margin rounded, extending to anterior margin of dorsal apodeme; distiphallus lateral view ( Fig. 42 ) bent ventrally at 90° angle, sinuate; ejaculatory apodeme ( Fig. 40 ), in cross­section flattened dorsoventrally.

Redescription of female.

Similar to male except as follows. Morphometric variation (n=10).

Body length 8.2–1.1, 10.1 mm

Head. Length 1.10–1.26, 1.18 mm. Frons pruinescence gray brown, silver gray ventrally with narrow dark brown area laterally along edge of eye; setae dark brown dorsally, white setae on silver gray area and lateral to antennal socket. Antenna/head length 0.78– 0.89, 0.84; scape length 0.36–0.43, 0.39 mm, length/width 1.9–3.0, 2.4, scape/pedicel length 2.8–4.3, 3.5, scape/flagellum width 0.8–1.1, 1.0; pedicel length 0.10–0.14, 0.12 mm, length/width 0.6–1.1, 0.8; flagellum length 0.44–0.53, 0.49 mm, length/width 2.3– 3.7, 3.0, flagellum/scape length 1.1–1.5, 1.3. Maxillary palpus length 0.52–0.68, 0.60, length/width 6.0–9.4, 7.5.

Thorax. Macrosetae 3, 5 np, 2 sa, 1 pa, 2 dc, 2 sc. Mesonotum dull gray; vittae indistinct; setae white intermixed with dark brown setae. Wing. Length 7.3–8.4, 7.9 mm, length/ width 2.9–3.4, 3.2, cell m3 open at wing margin.

Abdomen. Dark reddish brown, glossy with gray pruinescence over tergites 1 and 5– 7, across posterior of tergites 2–4, with tergite 8 glossy; dorsal setae on tergite 1 white, appressed with anteromedial area of brown, appressed setae, tergites 2–3 with dorsal setae predominately white with dark brown, appressed setae on dark brown areas, tergite 4 with dark brown appressed setae on dark brown area and a mixture of white and short black setae on pruinescent area, tergites 5–7 with black setae; lateral setae white on tergites 1–3 becoming black on remaining tergites. Terminalia . Setae on medial lobe of tergite 9 dark brown. Furca (as in Fig. 9 ) ovate, posterior margin truncate, anterior margin emarginate; length 0.60 mm, 0.44 mm wide; anterolateral projection short, narrow. Common duct subequal to length of furca. Spermathecal ducts originate from common duct.

Biology. Spiriverpa lunulata has been collected from 4 June to 2 August.

Distribution. Spiriverpa lunulata has been collected from Finland west to the United Kingdom ( Fig. 51 ).

Specimens Examined. Type specimens. The female holotype of Thereva lunulata Zetterstedt has the following locality information: "Dv" [Dovre], "Bhn" [Boheman] and was collected in Lapponia Norvegica. The holotype is in the NHRS and was examined by Dr. K. C. Holston. Frey (1911:55) described Thereva clausa as variety of T. lunulata based on two males and one female syntypes that had the wing cell m3 closed rather than open widely (this character varies significantly from open widely to closed and petiolate in Spiriverpa ). These syntypes are currently on loan, but the Finnish Museum has no record of whom. Lyneborg (1989:24 cat.) listed Thereva lunulata clausa as a synonym of Spiriverpa lunulata . Other Specimens. FINLAND. LAPPI. Petkula, Rikäng [67.6667, 26.6683], 11.VII.1956, R. Dahl, 1 female MEI 147284 (BMNH); Petsamo [61.508, 23.792], 13– 14.VII.1929, Lindb., H., 1 male MEI 126097 (MZHF); 14.VII.1929, 1 male MEI 126098 (MZHF); Valamo, 4.VI.1936, Kangas, Y., 1 male MEI 126096 (MZHF); Ivalo [68.65, 27.600], 28.VI.1929, Lindb., H., 1 male MEI 126094 (MZHF); Paanajärvi [Paamajärvi] [66.633, 23.967], 15.VII.1935, Krogerus, H., 1 male MEI 126106 (MZHF); Utsjoki [69.883, 27.000], date?, FHackman, W., 1 male MEI 126088 (MZHF); Utsjoki, Nuorgam [70.083, 27.85], 1.VII.1953, Kaisila, J., 1 male MEI 126095 (MZHF); Utsjoki, Onnela [69.9, 27.033], 11.VII.1937, Nordman, 1 male MEI 126091 (MZHF); Enontekis [Enontekiö] [68.500, 23.000], Sahlbg., J., 2 males MEI 126092, 126113, 1 female 126114 (MZHF). ETELÄ­SUOMEN LÄÄNI. Lapponia [Lappohja] [59.914, 23.222], 13– 14.VII.1929, Palmén, 1 male MEI 126100, 2 females MEI 126089­90 (MZHF); date?, Sahlbg., J., 2 males MEI 126093, 126099 (MZHF); Lindb., H., 7 males MEI 12610­2, 126107­8, 126110­1 (MZHF); 14.VII.1929, Lindb., H., 4 males MEI 126103­5, 126112 (MZHF); Petsamo [63.101, 27.095], Frey, R., 1 male MEI 126109 (MZHF). NORWA y. Skjavikor, 29.VII.1943, Soot­Ryen, T., 1 female MEI 147337 (TUMC); Vaage, –. VII.1832, Esmark, 1 male MEI 147348 (ZMUN). Buskerud: Honefoss [60.167, 10.3], date?, Siebke, 1 male MEI 147353 (ZMUN). Finnmark: Nordmo [69.533, 30.167], –. VII.1902, 2 males MEI 147313, 147315 (TUMC); Nuortit Sieida [70.216, 28.177], 18.VII.1937, Soot­Ryen, T., 1 female MEI 147319 (TUMC). Hedmark: Grundset [60.917, 11.517], date?, Siebke, 1 male MEI 147352, 1 female 147349 (ZMUN). More og Romsdal: Romsdal [62.667, 7.833], date?, Siebke, 1 male MEI 147350 (ZMUN); Andenes [69.321, 16.117], 22.VII.1941, Soot­Ryen, T., 2 males MEI 147335, 147338, 4 females 147330, 147332­3, 147336 (TUMC); 2 males MEI 147327, 147329 (TUMC). Nordland: Mo i Rana, Rikäng, [66.3167, 14.1667], 26.VI. 1956, R. Dahl, 1 male (BMNH); Saltdalen [66.833, 15.417], date?, Schoyen, 1 male MEI 147346 (ZMUN); Sommarhus [Sommerhus] [68.417, 14.683], 22.VI.1936, Soot­Ryen, T., 1 male MEI 147311, 1 female 147331 (TUMC); Somnes [65.368, 12.162], –. VII.1928, Soot­Ryen, T., 1 male MEI 147339, 1 female 147341 (TUMC); Storjord [66.818, 15.376], –. VI.1898, 4 males MEI 147310, 147318, 147324, 147326, 2 females MEI 147307­8 (TUMC). Oppland: Vagamo [61.883, 9.1], 11.VII.1953, collector?, 1 male MEI 147351 (ZMUN); 13.VII.1953, collector?, 1 male MEI 147354 (ZMUN). Troms: Frihetsli [68.783, 19.717], 26.VII.1922, Soot­Ryen, T., 3 males MEI 147314, 147317, 147322 (TUMC); 27.VII.1922, 1 male MEI 147328 (TUMC); Vannoya, 17.VII.1925, Soot­Ryen, T., 2 males MEI 147312, 147316, 5 females MEI 147309, 147320­1, 147323, 147325 (TUMC). SWE­ DEN. Jamtlands: Enafors [63.283, 12.35], 15.VII.1914, collector?, 1 male MEI 147340 (TUMC). Norrbottens: Pajala s:n, Kengis Utmockan [67.2000, 23.3667], date?, Ander, Ardö, Berdén, Dahl, 1 male MEI 147362 (BMNH); Sandskär, Valeriana [65.5667, 23.750], 9.VII.1973, R. Dahl, 1 male MEI 147365, 1 female 147287 (BMNH); Abisko [68.333, 18.35], 13.VII.1951, Vockeroth, J. R., 1 male MEI 125974 (CNC); 26.VII.1926, collector?, 1 male MEI 147301 (NHRS); 30.VII.1970, A. C. & B. Pont, 1 male MEI 147364 (BMNH); Abiskojavre [Abiskojaure] [68.303, 18.627], 26.VII.1926, 1 female MEI 147334 (TUMC); Sarek [67.433, 17.667], Poppius, B., 1 female MEI 147296 (NHRS). UNITED KINGDOM. ENGLAND. Heresford: River Monnow [51.8167, ­ 2.7000], 10.VII.1909, 1 female MEI 147286 (BMNH). SCOTLAND. Highlands: Aviemore [57.2, ­3.833], 1.VII.1903, King, J. J. F. X., 1 female MEI 138340 (RSME). Invernessshire: Nethy Bridge [57.2667, ­3.6667], 26.VI.1900, Lt. Col. Yerbury, 1 male MEI147367 (BMNH). Perth: Rannoch [56.6833, ­4.5667], 15.VI.1898, Lt. Col. Yerbury, 1 male MEI 147281 (BMNH). WALES. Powys: Llangammarch Wells, Brecknock [52.1167, ­3.550] 2.VIII.1913, Lt. Col. Yerbury, 1 male (BMNH).

Figures

FIGURES 36 – 49. 36 – 42. Spiriverpa lunulata. 36. Tergite 8, epandrium, cerci, hypoproct, dorsal view (MEI 126098). 37. Epandrium, lateral view. 38. Sternite 8, hypandrium, gonocoxite ventral view. 39. Gonocoxite, left lateral view. 40. Aedeagus, dorsal view (inset ejaculatory apodeme crosssection). 41. Aedeagus, ventral view. 42. Aedeagus, left lateral view. 43 – 49. S. senex. 43. Tergite 8, epandrium, cerci, hypoproct, dorsal view (MEI 070128). 44. Epandrium, lateral view. 45. Sternite 8, hypandrium, gonocoxite, ventral view. 46. Gonocoxite, left lateral view. 47. Aedeagus, dorsal view (inset ejaculatory apodeme cross­section). 48. Aedeagus, ventral view. 46. Aedeagus, left lateral view. Scale = 0.1 mm.

FIGURES 2 – 16. 2 – 9. Spiriverpa albiceps. 2. Tergite 8, epandrium, cerci, hypoproct, dorsal view (MEI 147368). 3. Epandrium, lateral view. 4. Sternite 8, hypandrium, gonocoxite, ventral view. 5. Gonocoxite, left lateral view. 6. Aedeagus, dorsal view (inset: ejaculatory apodeme cross­section). 7. Aedeagus, ventral view. 8. Aedeagus, left lateral view. 9. Female internal reproductive organs (MEI 013493). 10 – 16. S. argentata. 10. Tergite 8, epandrium, cerci, hypoproct, dorsal view (MEI 146202). 11. Epandrium, lateral view. 12. Sternite 8, hypandrium, gonocoxite, ventral view. 13. Gonocoxite, left lateral view. 14. Aedeagus, dorsal view (inset: ejaculatory apodeme cross­section). 15. Aedeagus, ventral view. 16. Aedeagus, left lateral view. Scale = 0.1 mm. Abbreviations: C = cercus, CD = common duct, DA = dorsal apodeme, Dp = distiphallus, EA = ejaculatory apodeme, Epa = epandrium, F = furca, Gs = gonostylus, Gx = gonocoxite, H = hypandrium, Hpt = hypoproct, Igp = inner gonocoxal process, LEP = Lateral ejaculatory process, Sp = spermatheca, SpD = spermathecal duct, SpS = spermathecal sac, SS = sensory seta, S 8 = sternite 8, T 8 = tergite 8, VA = ventral apodeme, VL = ventral lobe.

FIGURES 50 – 52. 50. Spiriverpa cinerascens distribution. 51. Spiriverpa lunulata distribution. 52. Spiriverpa senex distribution.