Winnertzia setosa, 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 : 32-33

Winnertzia setosa sp. nov.

Figs 58–62

Diagnosis. A medium-sized, brown Winnertzia with short antennae and broad wings. Male genitalic structures characteristic of W. setosa are as follows. The gonostylar claw is fairly long and broad, obliquely aligned, and situated slightly subapically ( Fig. 59 , ↓ 3). The broad gonocoxal synsclerite has an U-shaped emargination ( Fig. 59 , ↓ 4), which is bordered, and largely covered, by conspicuously dense, large setae. The posterior edge of the ninth tergite has a deep, sclerotized emargination ( Fig. 58 , ↓ 5). Females and preimaginal stages of this new species are unknown.

Other male characters. Body size 1.8 mm. Head. Eye bridge 4–5 ommatidia long dorsally. Antenna half as long as body. Scape and pedicel same size, both concolorous with flagellum. 11 flagellomeres; apical flagellomere long, composed of two nodes; flagellomeres 1–10 with translucent sensilla. Fourth flagellomere: neck 0.7 times as long as node; node 1.6 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla mostly obliquely aligned, filiform, linear to slightly bent ( Figs 60–61 ). Palpus as long as head height, 4 setae-bearing segments; apical segment longest of all. Labella of normal size. Thorax. Pronotal setae 13–15.Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, vaguely contoured. Wing shorter than body, 2.2 times as long as broad. Costal cell reinforced. M 4 long, gently bent just as CuA, both veins extending to edge of wing. Legs. Scales pointed. Basitarsal spines absent. Fore tibia 1.4–1.5 times length T 2. Acropods: claws slightly bent, basal tooth large; empodia nearly claw-long. Abdomen. Pleural membrane setose. Genitalia ( Fig. 59 ). Ninth tergite slightly longer than half gonopodal length; setae largely confined to lateroposterior portions; anterior edge indistinct. Gonocoxal synsclerite broader than long; a large portion ventrobasally non-setose; ventral emargination accompanied basally by extensive unsclerotized area; ventro- and dorsoposterior portions ending at same level; dorsal apodemes short, dorsal bridge concave to various extents ( Figs 59, 62 ). Gonostylus almost 2.5 times as long as broad, slightly broadened apically; basolateral apophysis moderately large, not angulated. Aedeagal apodeme parallel-sided except for slightly narrowed apex; solid basal portion long. Aedeagal bulge with closely spaced rows of tiny spikes. Tegmen elongate-subtriangular, largely membranous, vaguely contoured except for basal half which is more sharply outlined; flaps large, faintly contoured, without microtrichia; parameral apodemes small.

Etymology. The Latin setosa means setose, with reference to the gonocoxal emargination that in this species is framed by particularly dense setae.

Type material. Holotype. Male , Sweden, Uppland , Håbo , Biskops-Arnö, elm grove, 20 June–18 July 2005, Malaise trap, Swedish Malaise Trap Project (trap 8, collection event 1602) (spn CEC 1834 in NHRS) . Paratypes. 2 males, same data as the holotype (spn CEC 1835 in SDEI, spn CEC 1836 in NHRS) ; 1 male, same data but 18 June–4 July 2003 (collection event 389) (spn CEC 1875 in SDEI) .

Distribution and phenology. Winnertzia setosa is known from a small series of specimens collected during the summer of two different years in an elm grove in Uppland.

Figures

FIGURES 54–62. Male morphology of Winnertzia oelandica (54–57) and Winnertzia setosa (58–62). 54: Fourth flagellomere, lateral, paratype. 55: Ditto, medial. 56: Genitalia, ventral, holotype. 57: Basitarsus of foreleg, lateral, holotype. 58: Posterior portion of ninth tergite, dorsal, holotype. 59: Genitalia, ventral, holotype. 60: Fourth flagellomere, lateral, holotype. 61: Ditto, medial. 62: Dorsal gonocoxal bridge, ventral, paratype. Scales for 54–57 and 59–61, 0.05 mm; for 58 and 62, 0.025 mm.Arrows refer to characters described in the diagnoses.