Winnertzia lobata, 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 : 49-50

Winnertzia lobata sp. nov.

Fig. 84

Diagnosis. A medium-sized, brown species with setose anepimeron and male genitalic structures that in several respects are unique among Winnertzia ( Fig. 84 ). The ventral emargination of the gonocoxal synsclerite is flanked by a pair of big, circular protuberances (↓ 1), the aedeagal apodeme is strongly inflated above the solid basal portion (↓ 2), and the ninth tergite, whose posterior edge is markedly indented, has a pair of lobes with dense, short setae inside (↓ 3). Females and preimaginal stages of W. lobata are unknown. See W. panguana , a new species described below from Peru, whose aedeagal apodeme is inflated in a similar fashion.

Other male characters. Body size 2.0 mm. Head. Eye bridge 2–3 ommatidia long dorsally. Antenna slightly longer than half body. Scape slightly larger than pedicel, both concolorous with flagellum. 12 flagellomeres, the two apical flagellomeres almost merged with each other; translucent sensilla on flagellomeres 1–9. Fourth flagellomere (not pictured due to adverse position in the slide-mount): neck 0.6 times as long as node; node 1.6 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla filiform, obliquely aligned, variously bent. Palpus shorter than head height, 4 setae-bearing segments; fourth segment longest of all. Labella of normal size. Thorax. Pronotal setae about 20. Anepimeral setae 12. Lateral mediotergal microtrichia slightly enlarged. Parascutellar area bright, sharply contoured. Wing as long as body, 2.2 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 with both pointed and blunt-ended s cales. Basitarsal spines absent. Tarsi of fore legs missing. Acropods: claws slightly bent, untoothed; empodia vestigial. Abdomen. Pleural membrane with setae and scales. Genitalia ( Fig. 84 ). Ninth tergite two thirds gonopodal length; entirely, densely setose; anterior edge vague. Gonocoxal synsclerite broader than long; ventral emargination U-shaped, accompanied by small unsclerotized area basally, laterobasal edges with broad, sclerotized margins; ventroanterior edge reinforced by sclerotization, with subtriangular process medially; ventro- and dorsoposterior portions ending at same level; dorsal apodemes long and thin. Gonostylus almost 3 times as long as broad, thickest on apical half; pectinate claw large, with furrow along its base; basolateral apophysis normal size, angulated. Aedeagal bulge with closely spaced rows of tiny spikes. Aedeagal apodeme as long as gonocoxae, with sclerotized broadening apically. Tegmen membranous except for parameral apodemes and apex; apex broadly rounded, reinforced; flaps not visible; parameral apodemes strongly sclerotized, long, directed ventrolaterad.

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

Type material. Holotype. Male , Sweden, Småland, Alsterbro, backyard with diverse flora including woody plants, 27 May–19 June 2016, Malaise trap, M. & C. Jaschhof & S.-O. Ulefors (spn CEC 3020 in NHRS).

Distribution and phenology. This apparently rare species is known from a single specimen caught in spring in a backyard in Sweden’s province Småland. Winnertzia lobata is one out of three new Winnertzia found at that particular site, the other being W. smalandensis and a species left unnamed here.

Figures

FIGURES 84–89. Male morphology of Winnertzia lobata (84) and Winnertzia ombergensis (85–89), holotypes. 84: Genitalia, ventral. 85: Posterior portion of ninth tergite, dorsal. 86: Gonostylus, ventral. 87: Genitalia, ventral. 88: Fourth flagellomere, lateral. 89: Ditto, medial. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.