Winnertzia silvestris Jaschhof & Jaschhof 2020, sp. nov.

Winnertzia silvestris sp. nov.

Figs 124–127; Jaschhof & Jaschhof 2013: fig. 45A (as W. pravdini)

Diagnosis. Males of this species can be recognized using the following characters in combination. The length of the eye bridge matches 4–5 lateral and 1–2 dorsal ommatidia; the neck of the fourth flagellomere is 1.1 times as long as the node (Figs 124–125); the apical segment of the palpus is longer than each of the three preceding segments; pronotal setae number 9–17, anepimeral setae 5–9; the lateral mediotergal microtrichia are only little enlarged; the fore tibia is shorter than the second tarsomere (length ratio tb/T 2 = 0.8; Fig. 127); and the empodia are half as long as the claws whose basal tooth is as large as that usually found in Winnertzia (Fig. 126). As regards genitalic characters (Jaschhof & Jaschhof 2013: fig. 45A), the posterior edge of the ninth tergite is perfectly sinuous; the gonocoxal emargination, which is smaller than that of W. pratensis, extends only slightly beyond the midlength of the gonocoxal synsclerite; and the gonostylus has a conspicuously steep-walled apex. Additionally, males of W. silvestris are on average larger (1.5–2.0 mm) than that of W. pratensis (1.4–1.6 mm), a closely related species described above. Females and preimaginal stages of W. silvestris are unknown.

Etymology. The Latin adjective silvestris translates as forest-dwelling, referring to the habitat in which all our specimens were collected.

Type material. Holotype. Male, Sweden, Uppland, Uppsala, Fiby Nature Reserve, swampy section of oldgrowth mixed hemiboreal forest, 9 June–23 July 2010, Malaise trap, M. & C. Jaschhof (spn GULI000020956 in NHRS). Paratypes. 1 male, Sweden, Skåne, Simrishamn, Stenshuvud National Park, old-growth mixed broadleaf forest, 16 June 2009, sweepnet, MCJ (spn GULI000020955 in NHRS); 1 male, Uppland, Knivsta, Rickebasta NR, swamp forest of alder interspersed with spruce trees, 1–27 August 2009, MT, MCJ (spn SE 1655 in SDEI).

Other material studied. Sweden: 1 male, Öland, Mörbylånga, Färjestaden, backyard with grove of young birches, 10 June–10 July 2015, MT, MCJ (spn CEC 3054 in SDEI); 1 male, Småland, Nybro, Bäckebo, Grytsjön NR, old-growth mixed hemiboreal forest, 17 June–16 July 2015, MT, MCJ (spn CEC 3053 in SDEI).

Distribution and phenology. The five specimens known of W. silvestris were collected in summer (June–Au-gust) in different woodlands in the southern half of Sweden (Skåne to Uppland).