Perithreticus anderseni Kvifte, 2015, sp. nov.
Creators: name: Kvifte, Gunnar Mikalsen
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Perithreticus
Perithreticus anderseni

description: Perithreticus anderseni, sp. nov.
(Fig. 1)
Type material: Holotype ♂. TANZANIA: Tanga Region, W. Usambara mountains, beyond waterfall, 31.x.1990, G. Søli leg. 7 paratypes ♂, all from Tanzania: Tanga Region, W. Usambara mountains: Locality and date as holotype, 1 ♂; Mazumbai, 1740 m.a.s.l., 2.xi.1990, ZMB's Tanzania expedition leg. (sweep net), 1♂; Mazumbai, 1440 m.a.s.l., 23.xi.1990, ZMB's Tanzania expedition leg. (sweep net), 1♂ (coll. ZMUN); Mazumbai, "loc. GeF", 2– 6.xi.1990, ZMBs Tanzania expedition leg. (Malaise trap) 3 ♂ (coll. BMNH, RMCA, ZMNB); "Loc. A.B.J.", 3– 4.xi.1990, ZMBs Tanzania expedition leg. (Malaise Trap) 1 ♂
Additional material examined: TANZANIA: Tanga region, W. Usambara mountains, Mazumbai, 4– 13.xii.1990, ZMBs Tanzania expedition leg. (Malaise Trap) 2 ♂ (coll. RW)
Diagnosis. Perithreticus anderseni is characterized by flagellomeres 11 and 12 without internodes, approximately half the size of other flagellomeres; distiphallus parallel-sided, parameres with elongate medioanterior projections and surstyli with 7–11 tenacula. The corresponding character states in Perithreticus bishoppi are flagellomeres 11 and 12 with internodes, as big as other flagellomeres; distiphallus with lateral margins convex; parameres without medioanterior projections and surstyli with 5–6 tenacula.
Description. Male (n=8). Head (Fig. 1 A) about as long as wide; vertex about 0.25 times length of head; with single row of 5-8 dorsal ocular setae; eyebridge of four facet rows, separated by about 0.25–0.5 facet diameters; interocular area broader below and often meeting or nearly meeting above; interocular suture Y-shaped; frontal scar patch crown-shaped with median posterior extension reaching to middle of eyebridge; lengh of palpomeres 64: 116: 148: 140 (n=6, 5, 4, 2); labellum bulbous and setose; antennae (figs 1A, 1C) of 16 segments; scape cylindrical, widening somewhat distally; pedicel rounded, but slightly longer than broad; flagellomeres nodiform with paired Y-shaped ascoids, branches of ascoids thin and digitiform; terminal three flagellomeres diminutive, without ascoids; small spiniform sensillae present next to ascoids on flagellomeres 3–11; multiple spiniform sensillae on terminal ones; length of scape, pedicel and flagellomeres 64: 52: 108: 100: 100: 96: 94: 92: 90: 88: 82: 78: 36: 14: 14: 20 (n = 7, 7, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2); thorax (Fig. 1 E) without specialised allurement organs; anepisternum with half-circular hair patch; anepimeron triangular with sinusoid lower margin, ventral suture of anepimeron reaching about two thirds into sclerite; legs without special features, tarsi without dorsal projection (Fig. 1 D); wing (Fig. 1 B) elongate ovate, 1.92 mm long, 0.7 mm wide; membrane only with micropilosity; area between C and R1 infuscated; radial fork narrowly distal to CuA2, both very distal to medial fork; R1, R5 and M3 with outline strongly sclerotized at least dorsally; terminalia (Fig. 1 F) symmetrical; Hypandrium narrow, U-shaped; gonocoxites reniform with condyles narrowly arched, forming bridge; gonostylus setose, slightly longer than gonocoxite, more or less tapering; aedeagus with basiphallus laterally compressed, narrow in dorsal view; parameres present, subtriangular with blade-shaped posterior projections flanking aedeagus; epandrium (Fig. 1 G) subrhomboid with two skewed rows of pilosity; anterior margin with a narrow apodeme and two short lateroanterior processes which converge slightly at base; ventral epandrial plate triangular posteriorly until anterior margin of epandrium, with long quadratic anterior projection at base; anteriorly with two lappetshaped apodemes connected to parameres ('a vep j' in Fig. 1 G); surstyli (Fig. 1 H) elongate, curved, of even width throughout length; distally with 7–11 tenacula in one row; proctiger (Fig. 1 G) with hypoproct broadly m-shaped, wrinkled, with dense pilosity medioposteriorly; reaching to more than half of width of surstyli; epiproct small, oval, finely pilose.
Etymology. Named for Trond Andersen, University of Bergen, in appreciation of advice, opportunities, stories and coffee.
description: Published as part of Kvifte, Gunnar Mikalsen, 2015, The Afrotropical genera of Psychodini: Redefinition of the tribe, first Afrotropical record of Perithreticus Vaillant, 1973 and description of Soeliella gen. nov. (Diptera: Psychodidae: Psychodinae), pp. 115-126 in Zootaxa 3986 (1) on pages 118-120, DOI: 10.11646/zootaxa.3986.1.6, http://zenodo.org/record/236377