Peromyia sofielundensis Jaschhof & Jaschhof 2020, sp. nov.

Peromyia sofielundensis sp. nov.

Figs 28–29

Diagnosis. Peromyia sofielundensis is a species of the P. modesta group (Jaschhof 2017b: 98), as indicated by the large, subcylindrical gonostylus (Fig. 28), the robust tegmen, and the presence of two girdles of hair-shaped translucent sensilla on the flagellomeres (Fig. 29). A peculiarity of P. sofielundensis is the tegmen (Fig. 28, ↓ 2), whose outline and structure bear an uncanny resemblance to what is found in the P. lobata Yukawa group (Jaschhof & Jaschhof 2009: 158). However, while species of the lobata group have complex gonostyli with lobes and protuberances, the gonostylus of P. sofielundensis is lacking such modifications (Fig. 28, ↓ 1). Another diagnostic character of the new species is that the anterior girdle of short, hair-shaped translucent sensilla is situated close to the base of the flagellomeral node (Fig. 29, ↓ 3), not near the median as is usually the case in both the modesta and lobata groups. Peromyia sofielundensis is known from a single series of males; females and preimaginal stages are unknown.

Other male characters. Body size 1.2 mm. Head. Postfrons setose. Eye bridge 2–3 ommatidia long dorsally. A double row of 13–15 postocular bristles. Neck of fourth flagellomere longer than node (Fig. 29). Palpus usually 3-segmented, the apical segment long and apparently fused of two bodies, or rarely 4-segmented, the apical segment very small. Wing. R 1 3.5–4.0 times as long as Rs. Anterior portion of C extends beyond R 5 for once the vein width. Legs. Claws toothless. Genitalia (Fig. 28). Ninth tergite interrupted medially. Gonocoxal synsclerite with large, deep emargination ventrally; anterior edge of emargination vague, transitioning into a membranous, poorly contoured lobe ventrad of the tegmen; a large, subtriangular area below the emargination membranous and non-setose; another non-setose area ventroanteriorly; dorsal bridge U-shaped. Gonostylus about 3 times as long as broad, markedly bent, slightly tapered towards apex; basolateral apophysis small. Tegmen only slightly shorter than gonocoxae, elongate, broadest near midlength, with dark double rim along the longitudinal axis; apex rounded, slightly bent dorsad; ventral shield distinct, situated on posterior half of tegmen.

Etymology. The specific name is derived from the type locality, Sofielund Recycling Center south of Sweden’s capital Stockholm, the only site where this species is known to occur.

Type material. Holotype. Male, Sweden, Södermanland, Huddinge, Sofielund Recycling Center, pine grove at edge of garbage dump, 10–16 August 2004, Malaise trap, Swedish Malaise Trap Project (trap 5, collecting event 767) (spn. CEC 2738 in NHRS). Paratypes. 8 males, same data as the holotype (spns CEC2739 – CEC 2742 in NHRS, CEC2743 – CEC 2746 in SDEI).