Winnertzia incisa, 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 : 48

Winnertzia incisa sp. nov.

Fig. 83

Diagnosis. A medium-sized, brown Winnertzia , distinguished by the male ninth tergite whose posterior edge has an unusually deep, V-shaped indentation ( Fig. 83 , ↓ 4). Females and preimaginal stages of W. incisa are unknown. Another species of the solidaginis group with deeply incised ninth tergite is W. quercinophila , which differs from W. incisa in the outline of the incision and, even more clearly, in other genitalic structures ( Fig. 91 ).

Other male characters. Body size 2.2 mm. Head. Eye bridge 4–5 ommatidia long dorsally. Antenna slightly longer than half body. Scape larger than pedicel, both concolorous with flagellum. 12 flagellomeres, all with translucent sensilla. Fourth flagellomere (not pictured due to adverse position in the slide-mount): neck 0.7 times as long as node; node 1.6 times as long as broad; sensory hairs numerous; both the lateral and medial translucent sensilla filiform, U-shaped. Palpus slightly longer than head height, 4 setae-bearing segments; fourth segment longest of all. Labella of normal size. Thorax. Pronotal setae>30. Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, vaguely contoured. Wing shorter than body, 2.3 times as long as broad. Costal cell not reinforced. M 4 long, almost straight, CuA gently bent, both veins extending to edge of wing. Legs with both pointed and blunt-ended scales. Basitarsal spines absent. Fore tibia and T 2 equally long. Acropods: claws slightly bent, basal tooth large; empodia claw-long. Abdomen. Pleural membrane with both setae and scales. Genitalia ( Fig. 83 ). Ninth tergite two thirds gonopodal length; setae confined to posterolateral portions; anterior edge straight, distinct. Gonocoxal synsclerite broader than long; a short portion ventrobasally asetose; ventral emargination broadly V-shaped, accompanied basally by extensive unsclerotized area; ventroanterior edge indistinct, convex; dorsoposterior portions projecting beyond ventroposterior portions; dorsal apodemes long. Gonostylus about twice as long as broad, nearly parallel-sided, slightly bent; pectinate claw small; basolateral apophysis small, angulated. Aedeagal apodeme for the most part parallel-sided, slightly constricted apically; solid basal portion fairly long. Aedeagal bulge with widely spaced rows of tiny spikes. Tegmen slightly tapered towards blunt-ended apex, largely membranous, albeit sharply contoured; flaps narrow, faintly contoured, without microtrichia; parameral apodemes moderately large.

Etymology. The Latin incisa means incised, referring to the outline of the male ninth tergite.

Type material. Holotype. Male , Sweden, Öland , Borgholm, Skepparsäng Nature Reserve, mixed coniferous / broadleaf forest, 11 June–21 July 2015, Malaise trap, M. & C. Jaschhof (spn CEC 2940 in NHRS).

Distribution and phenology. The holotype, whose collection data are specified above, is the only specimen known of this species.

Figures

FIGURES 80–83. Male morphology of Winnertzia hemisphaerica (80–82) and Winnertzia incisa (83), holotypes. 80: Fourth flagellomere, lateral. 81: Ditto, medial. 82: Genitalia, ventral. 83: Ditto. Scales 0.05 mm. Arrows refer to characters described in the diagnoses.

FIGURES 90–93. Male morphology of Winnertzia panguana (90) and Winnertzia quercinophila (91–93), holotypes. 90: Genitalia, ventral. 91: Ditto. 92: Fourth flagellomere, lateral. 93: Ditto, medial. Scales 0.05 mm.Arrows refer to characters described in the diagnoses.