Perithreticus anderseni, Kvifte, Gunnar Mikalsen, 2015

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), Zootaxa 3986 (1), pp. 115-126 : 118-120

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.

Figures

FIGURE 1. Perithreticus anderseni, sp. nov. A. Head, B. Wing, C. Terminal antennal segments, D. tarsomeres of first leg, E. thorax, F. aedeagus and gonopods (left paramere in dorsal view, right paramere in ventral view), G. epandrium and proctiger, H. right surstylus. Length of scale bars in µm: 40 (A), 20 (B, G – H), 50 (D – F).