Winnertzia parvidens, Jaschhof & Jaschhof, 2020

Jaschhof, Mathias & Jaschhof, Catrin, 2020, Reevaluation of species richness in Winnertzia (Diptera, Cecidomyiidae, Winnertziinae), with descriptions of 37 new species from Sweden, Peru and Australia, Zootaxa 4829 (1), pp. 1-72 : 20-23

Winnertzia parvidens sp. nov.

Figs 30–34

Diagnosis. A medium-sized, brown Winnertzia with short palpi ( Fig. 34 ) and long, narrow wings. The club-shaped gonostylus has a conspicuously small pectinate claw, which is situated closer to the gonostylar apex than in any other member of the globifera group ( Fig. 30 , ↓ 1). Females and preimaginal stages of W. parvidens are unknown.

Other male characters. Body size 1.7–2.0 mm. Head. Eye bridge 2–3 ommatidia long dorsally. Antenna slightly shorter than body. Scape and pedicel same size, concolorous with flagellum. 12 flagellomeres, translucent sensilla present on flagellomeres 1–8. Fourth flagellomere: neck 0.8–0.9 times as long as node; node slender, twice as long as broad; sensory hairs rather sparse; both lateral and medial translucent sensilla long, filiform, meandering, with long apical extensions ( Figs 32–33 ). Sensilla on proximal flagellomeres occasionally furcate or anastomozing. Palpus clearly shorter than head height, 2–3 setae-bearing segments of varying length and outline, apical segment longest of all ( Fig. 34 ). Labella fully developed, albeit small. Thorax. Pronotal setae 3–9. Anepimeral setae absent. Lateral mediotergal microtrichia not enlarged. Parascutellar area bright, sharply contoured. Wing longer than body, 2.6 times as long as broad. Costal cell slightly reinforced. M 4 short, slightly bent, CuA moderately bent, both veins extending to edge of wing. Legs. Scales pointed. Basitarsal spines absent. Fore tibia 1.2–1.3 times length T 2. Acropods: claws slightly bent, empodia vestigial. Abdomen. Pleural membrane devoid of setae. Genitalia ( Fig. 30 ). Ninth tergite about half gonopodal length; setae confined to lateral portions; posterior edge shallowly concave, reinforced and with slight protuberance medially ( Fig. 31 ); anterior edge indistinct. Gonocoxal synsclerite slightly broader than long; a large portion ventrobasally non-setose; ventrobasal edge straight; ventral emargination large, U-shaped, membranous basally; dorsoposterior portions markedly extended, broadly rounded; dorsal apodemes long, protruding beyond ventrobasal gonocoxal edge. Gonostylus 3 times as long as broad, slightly bent; basolateral apophysis inconspicuous, not angulated. Aedeagal apodeme broadest beyond solid basal portion, the latter usually suddenly and markedly narrowed; distal portion gently tapered towards apex. Aedeagal bulge with closely spaced rows of tiny, hardly visible microtrichia. Tegmen elongate-subtriangular; apex narrowly rounded; central area darkly pigmented, sharply contoured, surrounded by broad, hyaline margin; flaps indiscernible; parameral apodemes moderately large.

Etymology. The name is a noun in apposition meaning small tooth, with reference to the conspicuously small gonostylar claw found in this species.

Type material. Holotype. Male , Sweden, Öland , Mörbylånga , Stora Dalby lund Nature Reserve, mixed broadleaf forest with plenty of dead ash trees, 9 July–8 August 2015, Malaise trap, M. & C. Jaschhof (spn CEC 1824 in NHRS).

Paratypes. 1 male, Öland, Mörbylånga, Gamla Skogsby (Kalkstad), ̒diversity meadow’, scrubby grassland, 9 June–6 July 2015, MT, MCJ (spn CEC 1825 in SDEI) ; 1 male, Mörbylånga, Ullevi, ̒herb-rich meadow at forest edge, 14 June–15 July 2015, MT, MCJ (spn CEC 1826 in SDEI) ; 1 male, Mörbylånga, Skogsby, Station Linné, swampy grassland near willow scrub, 2 June–4 July 2016, MT, MCJ & E. Gustavsson (spn CEC 1827 in NHRS) ; 1 male, Öland, Borgholm, Norra Bäck, garden land with lawn and woody plants, 1 June–4 August 2018, MT, MCJ (spn CEC 1828 in NHRS) .

Distribution and phenology. Winnertzia parvidens is known from several localities on the island of Öland. Adults were collected in June–July both in dense woodland and in open habitats where woody plants are scarce.

Figures

FIGURES 30–34. Male morphology of Winnertzia parvidens. 30: Genitalia, ventral, holotype. 31: Posterior portion of ninth tergite, dorsal, holotype. 32: Fourth flagellomere, lateral, paratype. 33: Ditto, medial. 34: Palpus, lateral, paratype. Scales 0.05 mm. Arrows refer to characters described in the diagnosis.