Winnertzia pilosistylus, 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 : 14-15

Winnertzia pilosistylus sp. nov.

Figs 14–16

Diagnosis. A medium-sized, brown Winnertzia with basitarsal spines and long fore tarsi. Male genitalic structures typical of this species ( Fig. 16 ) are the big gonostylus with conspicuously dense, large microtrichia apicomedially (↓ 1); the ventrobasal edge of the gonocoxal synsclerite which has a rounded protrusion medially (↓ 2); the conspicuously short, triangular gonocoxal apodemes (↓ 3); and the ninth tergite whose posterior edge is deeply emarginated (↓ 4). Females and preimaginal stages of W. pilosistylus are unknown.

Other male characters. Body size 1.8–2.5 mm. Head. Eye bridge 3–4 ommatidia long dorsally. Antenna longer than half body. Scape slightly larger than pedicel, both concolorous with flagellum. 11 flagellomeres, translucent sensilla present on flagellomeres 1–10. Fourth flagellomere: neck 0.6–0.7 times as long as node; node 1.8 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla long, filiform, linear to variously bent ( Figs 14–15 ). Palpus shorter than head height, 4 setae-bearing segments; apical segment about as long as preceding three segments together. Labella fully developed, albeit small. Thorax. Pronotal setae 9–13. Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, vaguely contoured. Wing shorter than body, 2.3–2.7 times as long as broad. Costal cell reinforced. M 4 long, almost straight, CuA strongly bent, both veins extending to edge of wing. Legs. Scales pointed. Fore tibia 0.8–0.9 times length T 2. Acropods: claws slightly bent, basal tooth large; empodia vestigial. Abdomen. Pleural membrane setose. Genitalia ( Fig. 16 ). Ninth tergite about half gonopodal length; setae confined to lateral portions; anterior edge distinct. Gonocoxal synsclerite slightly broader than long; a large portion ventrobasally non-setose; ventral emargination U-shaped, membranous and faintly contoured basally, with non-setose, unsclerotized area basally; ventroposterior portions enlarged, markedly protruding beyond dorsoposterior portions. Gonostylus 2.5 times as long as broad, slightly broadened towards apex; basolateral apophysis normal size, angulated.Apex of aedeagal apodeme first slightly broadened, then slightly constricted; solid basal portion short. Aedeagal bulge with rows of small spikes, its anterior edge well-marked as transverse line. Tegmen usually vaguely contoured, tapered towards apex; apex slightly reinforced, with fringe of long microtrichia; posterior edge slightly pointed rather than evenly rounded; flaps narrow; parameral apodemes moderately large.

Etymology. The name, a noun in apposition, highlights the conspicuously pilose gonostyli of this species.

Type material. Holotype. Male , Sweden, Öland , Borgholm, Lindreservat Nature Reserve, broadleaf mixed forest, 11 June–21 July 2015, Malaise trap, M. & C. Jaschhof (spn CEC 1814 in NHRS) . Paratypes. 8 males, same data as the holotype (spns CEC1815 – CEC 1822 in NHRS) .

Other material studied. 15 males, same data but 22 July–23 August 2015 (spns CEC1837 – CEC1842 and CEC1864 – CEC 1872 in SDEI) ; 1 male, same data but 24 August–1 October 2015 (spn CEC 1823 in SDEI) ; 2 males, Borgholm, Skepparsäng NR, mixed coniferous/broadleaf forest, 11 June–21 July 2015, MT, MCJ (spns CEC1873 – CEC 1874 in NHRS) .

Distribution and phenology. Winnertzia pilosistylus is known from two moist forests in northern Öland, southeast Sweden, where male adults were found in great numbers from mid-June to September.

Figures

FIGURES 14–19. Male morphology of Winnertzia pilosistylus (14–16) and Winnertzia rickebasta (17–19). 14: Fourth flagellomere, lateral, paratype. 15: Ditto, medial. 16: Genitalia, ventral, holotype. 17: Ditto. 18: Fourth flagellomere, lateral, holotype. 19: Ditto, medial. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.