Winnertzia upplandensis, 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 : 17

Winnertzia upplandensis sp. nov.

Fig. 20

Diagnosis. This medium-sized, dark-brown Winnertzia is distinguished by a combination of male genitalic characters, as follows ( Fig. 20 ). The gonostylus, which is gently broadened towards the apex, has dense, moderately large microtrichia that cover a small, well defined area apicomedially (↓ 1); the large, U-shaped gonocoxal emargination is accompanied by a small unsclerotized area basally; the gonocoxal apodemes are only half as long as the distance separating them (↓ 2); the broad-triangular tegmen has sharply contoured, microtrichose flaps (↓ 3); and the posterior edge of the ninth tergite is only slightly concave. Females and preimaginal stages of W. upplandensis are unknown.

Other male characters. Body size 1.8 mm. Head. Eye bridge 4–5 ommatidia long dorsally. Antenna longer than half body. Scape slightly larger than pedicel, both concolorous with flagellum. 12 flagellomeres; translucent sensilla present on flagellomeres 1–11. Fourth flagellomere (not pictured due to adverse position in the slidemount): neck 0.5 times as long as node; node 1.5 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla moderately long, slightly broadened basally, variously slightly bent. Palpus shorter than head height, 4 setae-bearing segments; apical segment longest of all. Labella fully developed. Thorax. Pronotal setae 15. Anepimeral setae absent. Lateral mediotergal microtrichia slightly enlarged. Parascutellar area bright, sharply contoured. Wing slightly shorter than body, 2.3 times as long as broad. Costal cell reinforced. M 4 long, nearly straight, CuA strongly bent, both veins extending to edge of wing. Legs. Scales pointed. Fore tibia 1.4 times length T 2. Acropods: claws slightly bent, basal tooth large; empodia vestigial. Abdomen. Pleural membrane setose. Genitalia ( Fig. 20 ). Ninth tergite about half gonopodal length; setae confined to lateroposterior portions; anterior edge indistinct. Gonocoxal synsclerite broader than long; a large portion ventrobasally non-setose; ventroanterior edge slightly concave; ventro- and dorsoposterior portions ending at about same level. Gonostylus about 2.5 times as long as broad; setae conspicuously small and sparse; basolateral apophysis normal size, angulated. Aedeagal apodeme thick, slightly constricted beyond the solid basal portion, which is short and poorly sclerotized; apex slightly constricted. Aedeagal bulge with closely spaced rows of tiny spikes. Tegmen vaguely contoured, especially on apical half; parameral apodemes moderately large.

Etymology. The name is derived from Uppland, the province in Sweden where the holotype of this species was collected.

Type material. Holotype. Male , Uppland , Knivsta, Rickebasta Nature Reserve, swamp forest of alder mixed with spruce trees, 25 June–31 July 2009, Malaise trap, M. & C. Jaschhof (spn GULI000021002 in NHRS).

Distribution and phenology. Winnertzia upplandensis is another species known only from the alder swamp of Rickebasta. The single specimen of this species was found in a Malaise trap sample taken at the height of summer.

Figures

FIGURES 20–21. Male genitalia of Winnertzia spp., ventral, holotypes. 20: Winnertzia upplandensis. 21: Winnertzia warraensis. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.