Spiriverpa Irwin and Lyneborg

• Main Author: Webb, Donald W.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Therevidae; Spiriverpa; Lapponia
• Online Access: https://doi.org/10.5281/zenodo.6264599; http://treatment.plazi.org/id/2B6C87C5AA1FFF91FECFAF0CFD23FC02

Spiriverpa Irwin and Lyneborg Spiriverpa Irwin and Lyneborg (1981a:214 orig. desc.; 1981b:522 key), Lyneborg (1989:24 cat.), Nagatomi and Lyneborg (1989:359 add. desc.). Type species Thereva lunulata Zetterstedt (1838:523), by original designation. Type locality: Norway (Lapponia, Norvegica). Spiriverba: Zaitzev (1986:4, misspelling of Spiriverpa ). Irwin and Lyneborg (1981a:214) provided an extensive description of this genus. The following are additions to the description of Irwin and Lyneborg. Moderate sized flies, male (6.8–11.5 mm, n=54), female (6.8–12.2 mm, n=55). Head. Ocellar tubercle reddish brown, pruinescence gray; setae dark brown to black. Eyes reddish brown. Frons lacking black pruinescent band lateral to antennal base. Antenna generally shorter than length of head; scape cylindrical, longer than wide, longer than length of pedicel; pedicel globose, wider than long; flagellum longer than wide, subequal to or longer than length of scape, first flagellomere oval, distal third tapered apically, second flagellomere short, cylindrical, third flagellomere short, tapering to point apically, apical style minute. Parafacial broad, pruinescence white to silver. Maxillary palpus cylindrical, apex rounded, longer than wide. Genal setae white. Occiput convex, pruinescence white, dense; setae white, elongate over entire occiput; macrosetae dark reddish brown to black. Postocular macrosetae dark reddish brown to black, in single row. Thorax. Macrosetae males 2–4 np, 1–2 sa, 1 pa, 1–2 dc, 2 sc (n=54), females 2–5 np, 1–2 sa, 1 pa, 1–3 dc, 2 sc (n=55). Mesonotum dark brown to black, pruinescence gray. Postpronotal lobe concolorous with mesonotum. Pleuron and scutellum pruinescence gray, dense. Setae on posterodorsal corner of proepimeron, over entire anepisternum, laterotergite, metanepisternum, and scutellum, on anterior half of katepisternum, across dorsal margin of anepimeron; absent on anepimeron, meron, and metakatepisternum. Wing. Pterostigma brown; setulae absent on R1; cell cup closed, petiolate. Legs. ...