Paurodyla serrata sp. nov.

Figs 25–28

Diagnosis. This new species differs from P. tyresta Jaschhof, the only congener, in several details of the male genitalia, as follows. The parameres of P. serrata have serrate outer edges (Fig. 27, ↓ 1) and straight, posteriad directed apices, whereas the parameres of P. tyresta are tusk-shaped with dorsad bent apices (Jaschhof & Jaschhof 2013: fig. 140A). The ventral gonostylar lobe of P. serrata, which is covered in dense, large microtrichia (Fig. 25, ↓ 2), has a flat tooth along the inner edge that continues up to the dorsal lobe (↓ 3); in P. tyresta, the ventral lobe has ordinary, small microtrichia plus a tiny apical tooth (Fig. 29, ↓ 4), while the dorsal lobe has a separate, fingernail-shaped tooth apically (↓ 5).

Other male characters. Body size 1.6 mm. Head. Eye bridge without ommatidia at vertex. Antenna shorter than body. Scape and pedicel concolorous with flagellum. Circumfila on flagellomeres 1–10, evenly ring-shaped or slightly sinuous. Neck and node of fourth flagellomere equally long (Fig. 28). Palpus slightly shorter than head height, 4 setose, subcylindrical segments, apical segment longest of all. Thorax. Pronotum with 1 seta; anepisternum non-setose; anepimeron with 2–3 setae. Wing markedly longer than body. Length / width ratio 3.1. Membrane fully setose. Venation as in P. tyresta (Jaschhof & Jaschhof 2013: 292) . Legs. Foreleg: femur and tibia equally long, tibia 1.2 times as long as T 2. Acropods as in P. tyresta . Genitalia (Fig. 26). Ninth tergite small, sparsely setose. Gonocoxal synsclerite with large setae ventrolaterally and dorsally; on the ventral side, setose and non-setose portions are separated by an interior, sclerotized rim forming a wide, inverted V; ventral emargination small, broadly U-shaped, bordered by a broad, darkly pigmented margin; gonocoxal processes present as short, sclerotized knobs at the base of the emargination; dorsal apodemes massive. Aedeagal apodeme clearly shorter than gonocoxae; ducts of accessory glands inconspicuous.

Etymology. The Latin adjective serrata means serrate, with reference to the saw-toothed parameres found in this species.

Type material. Holotype. Male, Sweden, Södermanland, Haninge, Tyresta National Park, Urskogsslingan, dry pine forest, 24 May–9 June 2005, Malaise trap, Swedish Malaise Trap Project (trap 3, collecting event 2101) (spn. CEC 2124 in NHRS) . Paratypes. 1 male, same data as the holotype (spn. CEC 2125 in SDEI); 1 male, Sweden, Västerbotten, Vindeln, Kulbäcksliden Experimental Forest, Gammnybränna, previous stand of spruce and larch trees 10 years after cutting, 18 June–9 July 2004, MT, SMTP (trap 56, collecting event 1265) (spn. CEC 2126 in NHRS) .

Remark on the occurrence. Paurodyla serrata and P. tyresta were found co-occurring at both the sites where specimens of the former were collected. This might indicate that species of Paurodyla depend on a similar resource, most likely a particular group of fungi.