Winnertzia warraensis, 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 : 17-19

Winnertzia warraensis sp. nov.

Fig. 21

Diagnosis. A medium-sized, brown Winnertzia with distinctive male genitalic structures. Winnertzia warraensis is the only member of the discreta group whose aedeagal apodeme is strongly swollen beyond the solid basal portion ( Fig. 21 , ↓ 4). Females and preimaginal stages of this species are unknown.

Other male characters. Body size 2.0 mm. Head. Eye bridge 2–3 ommatidia long dorsally. Antenna slightly longer than half body. Scape and pedicel same size, both concolorous with flagellum. 11 flagellomeres; translucent sensilla present on flagellomeres 1–10. Fourth flagellomere (not pictured due to adverse position in the slidemount): neck 0.6 times as long as node; node 1.7 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla filiform, variously bent. Palpus shorter than head height, 4 setae-bearing segments; first segment very short; fourth segment longest of all. Labella fully developed, albeit small. Thorax. Pronotal setae 10. Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, sharply contoured. Wing shorter than body, 2.4 times as long as broad. Costal cell slightly reinforced. M 4 long, almost straight, CuA moderately bent, both veins extending to edge of wing. Legs. Scales pointed. Basitarsal spines absent. Fore tibia 1.1 times length T 2. Acropods: claws slightly bent; basal tooth large; empodia vestigial. Abdomen. Pleural membrane setose. Genitalia ( Fig. 21 ). Ninth tergite as long as gonocoxae; setae confined to posterior half portion; posterior edge with lateral lobes that in the specimen studied are angular rather than rounded; anterior edge straight, sharply contoured. Gonocoxal synsclerite slightly broader than long; a short portion ventrobasally non-setose; ventral emargination V-shaped, accompanied by extensive unsclerotized area basally; ventrobasal edge slightly convex; dorsoposterior portions slightly protruding beyond ventroposterior portions; dorsal apodemes long and thin. Gonostylus subcylindrical, straight, more than twice as long as broad; dense, large microtrichia apically and mediosubapically; basolateral apophysis small, angulated. Setae retained on gonostyli and gonocoxae all short. Aedeagal apodeme as long as gonocoxae; evenly tapered from subbasal swelling towards apex; solid basal portion fairly long. Aedeagal bulge with rows of fine spikes. Tegmen including flaps sharply contoured, gently tapered towards apex, with subapical constriction; parameral apodemes normal size.

Etymology. The name is derived from Warra, the type locality of this species.

Type material. Holotype. Male, Australia, Tasmania, Warra Long Term Ecological Research ( LTER) Site , Mt Weld , 100 m elevation, wet mixed eucalypt forest, 27 February 2001, Malaise trap, N. Doran & R. Bashford (Forestry Tasmania) (registration number F 41447 in Tasmanian Museum and Art Gallery , Hobart ).

Distribution and phenology. Formally speaking, Winnertzia warraensis is a Tasmanian, or Australian respectively, endemic. The habitat at the type locality is wet eucalypt forest in a pristine state, where the holotype was caught in flight in late summer. A further 21 Winnertzia males that we studied from the Warra LTER Site turned out to belong to five or six species different from W. warraensis . This makes us believe that a more specific search for Winnertzia in Warra would unearth many more species of this genus.

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.