Winnertzia egregia, 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 : 44

Winnertzia egregia sp. nov.

Figs 74–76

Diagnosis. A medium-sized, brown Winnertzia with distinctive male genitalic structures, as follows ( Fig. 76 ). The posterior edge of the ninth tergite is broadly rounded (holotype) to blunt (paratype), with a pair of microtrichose, sparsely setose lobes inside (↓ 1). The gonostylus, whose maximum thickness is on the distal half, is markedly convex medially (↓ 2); the apical claw is small (↓ 3); and the basolateral apophysis is only little angulated. Females and preimaginal stages of W. egregia are unknown. Species with superficially similar gonostyli are W. brevipalpata , W. smalandensis (both solidaginis group), and W. regia ( tridens group).

Other male characters. Body size 1.7–2.0 mm. Head. Eye bridge 2–3 ommatidia long dorsally. Antenna two thirds body length. Scape slightly larger than pedicel, both concolorous with flagellum. 12 flagellomeres, the two apical flagellomeres almost merged with each other; translucent sensilla on flagellomeres 1–10. Fourth flagellomere: neck half as long as node; node twice as long as broad; sensory hairs numerous; translucent sensilla filiform, lateral sensillum obliquely aligned, medial sensillum longitudinally aligned, both variously bent ( Figs 74–75 ). Palpus shorter than head height, 4 setae-bearing segments; fourth segment longest of all. Labella of normal size. Thorax. Pronotal setae 13–15. Anepimeral setae absent. Lateral mediotergal microtrichia slightly enlarged. Parascutellar area bright, sharply contoured. Wing shorter than body, 2.5 times as long as broad. Costal cell slightly reinforced. M 4 long, almost straight, CuA moderately bent, both veins extending to edge of wing. Legs. Scales pointed. Basitarsal spines absent. Fore tibia and T 2 same length. Acropods: claws slightly bent, basal tooth large; empodia almost as long as claws. Abdomen. Pleural membrane with setae and scales. Genitalia ( Fig. 76 ). Anterior boundary of ninth tergite vague; setae confined to lateroposterior portions. Gonocoxal synsclerite slightly broader than long; ventral emargination resembling a widely open U, with large unsclerotized area basally; ventroanterior edge strongly convex; ventro- and dorsoposterior portions ending at same level; dorsal apodemes long and thin. Gonostylus twice as long as broad. Aedeagal bulge with widely spaced rows of tiny spikes. Aedeagal apodeme parallel-sided, vaguely contoured basally. Tegmen subtriangular with membranous, narrowly rounded apex, on basal two thirds sharply contoured; flaps large, sharply contoured; parameral apodemes long, directed ventrolaterad.

Etymology. The species epithet is the Latin adjective for extraordinary.

Type material. Holotype. Male , Sweden, Öland , Borgholm , Horns kungsgård Nature Reserve, forest mixed of softwoods (alder, birch, willow) at lakeside, 21 July–22 August 2015, Malaise trap, M. & C. Jaschhof (spn CEC 3018 in NHRS) . Paratypes. 1 male, Sweden, Uppland , Älvkarleby, Båtfors, dry pine forest, 29 July–12 August 2003, MT, SMTP (trap 7, collection event 3058) (spn CEC 3019 in SDEI) .

Distribution and phenology. The two males known of W. egregia come from different types of forest in the southern half of Sweden (Öland, Uppland). Both specimens were collected at the height of summer.

Figures

FIGURES 74–79. Male morphology of Winnertzia egregia (74–76) and Winnertzia fraxinophila (77–79), holotypes. 74: Fourth flagellomere, lateral. 75: Ditto, medial. 76: Genitalia, ventral. 77: Ditto. 78: Fourth flagellomere, lateral. 79: Ditto, medial. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.