Anocha vernalis, 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 : 283-284

Anocha vernalis sp. nov.

Fig. 5A–C

Diagnosis. This is the smallest species known of Anocha and the only one in which the necks of the male flagellomeres are shorter than the nodes ( Fig. 5C ). The gonostylus is straight rather than bent and slightly more slender compared with other Anocha ( Fig. 5A ); the apical tooth extends far onto the dorsal side of the gonostylus ( Fig. 5B ). The ventral gonocoxal emargination is a well-defined, narrow U-shape ( Fig. 5A ). Females are unknown.

Other male characters. Body size 1.8 mm. Head. Eye-bridge incomplete, 3–4 ommatidia long at vertex. Postocular bristles 2. Apical two flagellomeres of holotype fused with each other, resulting in only 13 distinct flagellomeres; paratype with 14 flagellomeres. Flagellomeral nodes sparsely covered with microtrichia. Apical palpal segment subcylindrical, not club-shaped. Wing. Membrane fully setose. Rs extremely short. Tines of M1+2 parallel to each other. M4 and especially CuA faint, practically indiscernible. Terminalia ( Fig. 5A ). Ninth tergite trapezoid. Gonocoxites as long as wide; ventral emargination membranous basally; membranous window slitshaped; ventrobasal edge convex. Gonostylus 2.5 times longer than wide. Tegmen subtrapezoid. Aedeagal teeth about 20.

Etymology. The species epithet, vernalis , is a Latin adjective meaning ‘belonging to spring’.

Types. Holotype. Male (no. CEC399), Sweden, Skåne, Tomelilla, Drakamöllan , dry heathland with juniper and common bent, 24–31 May 2005, Malaise trap, Swedish Malaise Trap Project (trap 38, collecting event 1443) (in NHRS). Paratype . Male (no. CEC400), same data as the holotype (in SDEI).

Distribution and phenology. Sweden (Skåne). The two specimens known of this species were collected in late spring in a dry, sandy heathland.

Figures

FIGURE 5 A – C. Anocha vernalis, males. A: Genitalia, ventral (holotype). B: Gonostylus, dorsal (paratype). C: Fourth flagellomere, microtrichia omitted, lateral (holotype). Scales for A – C, 0.05 mm.