Winnertzia ekdalensis, 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 : 27-28

Winnertzia ekdalensis sp. nov.

Figs 44–47

Diagnosis. A medium-sized, brown Winnertzia with broad, roundish wings devoid of vein M 4 ( Fig. 45 ). The elongate, slender gonostylus is slightly convex medially and equipped with a long pectinate claw apically ( Fig. 44 , ↓ 3); the aedeagal apodeme is on the distal half slightly broader than basally (↓ 4); the posterior edge of the ninth tergite is shallowly concave; and the gonocoxal dorsal apodemes are shorter than half the distance separating them (↓ 5). Females and preimaginal stages of W. ekdalensis are unknown.

Winnertzia ekdalensis conforms with W. grytsjoenensis , the species described next, in having 11 flagellomeres, broad wings, no M 4, and no basitarsal spines. Both species differ in the genitalic structures of males, notably the gonostylus, the tegmen, and the aedeagal apodeme (see Fig. 44 versus Fig. 50 ).

Other male characters. Body size 1.8 mm. Head. Eye bridge 4–5 ommatidia long dorsally. Antenna slightly longer than half body. Scape slightly larger than pedicel, both concolorous with flagellum. Presumably 11 flagellomeres (10 retained), flagellomeres 1–6 with translucent sensilla. Fourth flagellomere: neck 0.5 times as long as node; node 1.8 times as long as broad; sensory hairs numerous; translucent sensilla filiform, irregularly meandering, the lateral shorter than the medial sensillum ( Figs 46–47 ). Palpus about as long as head height, 4 setaebearing segments; apical segment longest of all. Labella of normal size. Thorax. Pronotal setae 16. Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, sharply contoured. Wing ( Fig. 45 ) shorter than body, 2.1 times as long as broad. Costal cell reinforced. CuA gently bent, ending shortly before wing edge. Legs. Scales pointed. Basitarsal spines absent. Fore tibia 1.4 times length T 2. Acropods: claws slightly bent, basal tooth large; empodia 0.8 claw length. Abdomen. Pleural membrane setose. Genitalia ( Fig. 44 ). Ninth tergite shorter than half gonopodal length; setae confined to posterior portion; anterior edge faint. Gonocoxal synsclerite broader than long; setae near base of emargination conspicuously large; a large portion ventrobasally non-setose; ventrobasal edge faint, straight; ventral emargination U-shaped, membranous basally, accompanied by U-shaped unsclerotized area basally; ventro- and dorsoposterior portions ending at same level. Gonostylus 2.7 times as long as broad; basolateral apophysis small, angulated. Aedeagal apodeme: solid basal portion moderately long; apex slightly constricted. Aedeagal bulge apparently without spikes. Tegmen largely membranous, vaguely contoured except for basal third which is more sharply outlined, narrowly rounded apically; flaps distinct, with hardly visible microtrichia; parameral apodemes small.

Etymology. The name is derived from Ekdalen, a nature reserve in Uppland where the only specimen known of this species was collected.

Type material. Holotype. Male, Sweden, Uppland, Uppsala, Ekdalen Nature Reserve , sparse woodland of oak, 20 July–3 August 2004, Malaise trap, Swedish Malaise Trap Project (trap 27, collection event 1035) (spn CEC 1863 in NHRS).

Distribution and phenology. Winnertzia ekdalensis is known from a single specimen, whose collection data are specified above.

Figures

FIGURES 41–47. Male morphology of Winnertzia dentata (41–43) and Winnertzia ekdalensis (44–47), holotypes. 41: Fourth flagellomere, lateral. 42: Ditto, medial. 43: Genitalia, ventral. 44: Ditto. 45: Wing, dorsal. 46: Fourth flagellomere, lateral. 47: Ditto, medial. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.

FIGURES 48–53. Male morphology of Winnertzia grytsjoenensis (48–50) and Winnertzia normalis (51–53). 48: Fourth flagellomere, lateral, holotype. 49: Ditto, medial. 50: Genitalia, ventral, holotype. 51: Ditto. 52: Fourth flagellomere, lateral, paratype. 53: Ditto, medial. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.