Winnertzia hemisphaerica, 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 : 46-48

Winnertzia hemisphaerica sp. nov.

Figs 80–82

This species was referred to in our 2013 treatise on Winnertzia as species D ( Jaschhof & Jaschhof 2013: 100 f., fig. 44B, showing a specimen different from the holotype designated here).

Diagnosis. A medium-sized, light-brown Winnertzia , distinguished from other species of the solidaginis group by the U-shaped gonocoxal emargination whose base is sclerotized ( Fig. 82 , ↓ 1). Other genitalic structures of diagnostic merit are the gonocoxal dorsal apodemes, which are fairly short and far apart from each other (↓ 2); the ninth tergite, whose posterior edge is broad and sinuous; the aedeagal apodeme, whose apex is, invariably, brightened (which is hard to illustrate); and the subtriangular tegmen, which has a membranous, faintly contoured apex, almost invisible flaps, and small parameral apodemes (↓ 3). Females and preimaginal stages of W. hemisphaerica are unknown.

Other male characters. Body size 1.8–2.0 mm. Head. Eye bridge 3–4 ommatidia long dorsally. Antenna slightly longer than half body. Scape slightly larger than pedicel, both brighter than flagellum. 12 flagellomeres, translucent sensilla on flagellomeres 1–11. Fourth flagellomere: neck 0.5 times as long as node; node 2.1 times as long as broad; sensory hairs numerous; both lateral and medial translucent sensilla fairly small, mostly obliquely aligned, filiform, straight to variously U-shaped ( Figs 80–81 ). Palpus slightly shorter than head height, 4 setae-bearing segments; fourth segment longest of all, about as long as two preceding segments together. Labella of normal size. Thorax. Pronotal setae about 15. Anepimeral setae absent. Lateral mediotergal microtrichia little enlarged. Parascutellar area bright, vaguely contoured. Wing shorter than body, 2.4 times as long as broad. Costal cell slightly reinforced. M 4 long, almost straight, CuA strongly bent, both veins extending to edge of wing. Legs. Scales pointed. Basitarsal spines absent. Fore tibia and T 2 equally long. Acropods: claws slightly bent, basal tooth large; empodia vestigial. Abdomen. Pleural membrane with setae and scales. Genitalia ( Fig. 82 ). Ninth tergite two thirds gonopodal length; setae confined to lateroposterior portions; posterior edge with darkly pigmented margin around the indentation; anterior edge straight, distinct. Gonocoxal synsclerite broader than long; lateral edges usually slightly concave subbasally; ventral setae fairly short; ventroanterior edge distinct, straight; medial bridges bulging; ventro- and dorsoposterior portions ending at about same level. Gonostylus twice as long as broad, parallel-sided, almost straight; pectinate claw moderately large, with furrow along its base; basolateral apophysis fairly large, angulated. Aedeagal bulge with closely spaced rows of tiny spikes. Aedeagal apodeme parallel-sided; solid basal portion short. Tegmen on basal two thirds sharply contoured.

Etymology. The Latin hemisphaerica means hemispherical, an attribute describing the outline of the gonocoxal emargination.

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 3007 in NHRS) . Paratypes. 2 males, same data as the holotype (spns CEC3008 – CEC 3009 in NHRS) ; 1 male, same data but 22 July–23 August 2015 (spn CEC 3010 in NHRS) ; 4 males, Öland , Borgholm, Lindreservat Nature Reserve, mixed broadleaf forest, 11 June–21 July 2015, MT, MCJ (spns CEC3011 – CEC 3014 in SDEI) ; 1 male, same data but 22 July–23 August 2015 (spn CEC 3015 in SDEI) .

Other material studied. Sweden: 3 males, Skåne, Malmö, Limhamns kalkbrott, 26 June–8 July 2009, MT, B.W. Svensson et al. (spns GULI000021395 – GULI000021396 and SE 1637 in NHRS) ; 4 males, same data but 8–26 July 2009 (spns SE1638 – SE 1641 in SDEI) ; 1 male, same data but 27 July–16 August 2009 (spn CEC 3016 in NHRS) ; 2 males, same data but 17–30 August 2009 (spns SE1642 – SE 1643 in NHRS) ; 1 male, Småland, Nybro, Bäckebo , Grytsjön NR, old-growth thin aspen forest, 17 July–21 August 2015, MT, MCJ (spn CEC 3017 in SDEI) .

Distribution and phenology. All the specimens known of this species, altogether 20 males, were collected in June–August in the southernmost provinces of Sweden (Skåne, Småland, Öland).

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.