Anocha glabra, Jaschhof, Mathias, 2017

Jaschhof, Mathias, 2017, Catochini, Strobliellini and Acoenoniini revisited: a taxonomic review of the small tribes of the Micromyinae (Diptera: Cecidomyiidae), Zootaxa 4250 (3), pp. 275-295 : 278-279

Anocha glabra sp. nov.

Figs 1A–D , 2D

Diagnosis. The eye-bridge is complete; the short M1+2-fork has slightly diverging tines ( Fig. 2D ). Male flagellomeres, except the first and second, lack microtrichia ( Fig. 1B ), which is unusual in Anocha . The slightly bent gonostylus is markedly tapered towards the apex ( Fig. 1A ).

Differential diagnosis. Among Anocha with sinuous CuA, A. glabra is the only species lacking microtrichia on male flagellomeres 3–14. Male genitalic structures of A. glabra and A. grytsjoenensis are similar, with the exception of the gonostyli, which in A. glabra are clearly tapered ( Fig. 1A ) and in A. grytsjoenensis are more parallel-sided ( Fig. 2A ). The female of A. spinosa differs from A. glabra in the flagellomeres having distinct necks ( Jaschhof 1998: fig. 37a).

Other characters. Male. Body size 2.7–3.0 mm. Head. Eye-bridge 4–6 ommatidia long, longest at vertex. Postocular bristle 0–1. Neck of fourth flagellomere 1.7 times longer than node ( Fig. 1B ). Palpus as in Fig. 1C . Wing. Membrane fully setose. Point of furcation of M1+2 situated at about same level as apex of M4 ( Fig. 2D ). Terminalia ( Fig. 1A ). Ninth tergite trapezoid. Gonocoxites wider than long; ventral emargination broadly Vshaped, membranous and faintly contoured on inferior half; membranous window slit-shaped; ventrobasal edge convex. Gonostylus 2.2 times longer than wide; apical tooth large, covering most of gonostylar apex, adpressed basally to gonostylar body. Tegmen subtrapezoid. Aedeagal teeth about 20. Ejaculatory apodeme with indistinct widening apically.

Female. Body size 3.5 mm. Head. Fourth flagellomere subcylindrical, with very short neck, 1.3 times longer than wide, node covered with innumerable simple, hair-shaped translucent sensilla of various sizes, 1 subbasal whorl of setae. Palpus as in Fig. 1D . Terminalia. Basicercus same length as disticercus. Spermathecae 2, strongly sclerotized, ovoid, slightly flattened, about as large as disticerci.

Etymology. The species epithet, glabra , is a Latin adjective meaning glabrous, with reference to the absence of microtrichia from the male flagellum.

Types. Holotype. Male (no. CEC395), Sweden, Norrbotten, Pajala, Vassikavuoma , marshland used for haymaking, 22 Aug.–14 Sep. 2003, Malaise trap, Swedish Malaise Trap Project (trap 49, collecting event 709) (in NHRS) . Paratypes. 1 male (no. CEC396), Sweden, Småland, Nybro, Bäckebo, Grytsjön NR, swampy meadow at forest edge, 30 Sep.–30 Nov. 2015, MT, MCJ (in SDEI) ; 1 female (CEC397), same data but mixed old-growth taiga (in SDEI) ; 1 male (CEC398), Sweden, Lule Lappmark, Sorsele, Ammarnäs, Vindelfjällen NR, Tjulträsklaspen, subalpine birch forest, 13 Sep.–4 Oct. 2004, MT, SMTP (trap 46, collecting event 1204) (in NHRS) .

Distribution and phenology. Sweden (Småland, Norrbotten, Lule Lappmark). Adults were collected from late August to November in swampy meadows and forests. Anocha glabra and A. grytsjoenensis were found to occur at the same sites.

Figures

FIGURE 1 A – D. Anocha glabra. A: Male genitalia, ventral (holotype). B: Male fourth flagellomere, lateral (holotype). C: Male palpus, lateral (holotype). D: Female palpus, apical segment curtailed, lateral (paratype). Scales for A – D, 0.05 mm.

FIGURE 2 A – D. Anocha grytsjoenensis (A – C) and Anocha glabra (D). A: Male genitalia, ventral (holotype). B: Male fourth flagellomere, lateral (holotype). C: Wing (holotype). D: Apex of wing (holotype). Scales for A – B, 0.05 mm, for C – D, 1.0 mm.