Winnertzia ruliki, 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 : 68-69

Winnertzia ruliki sp. nov.

Figs 132–134

Diagnosis. A medium-sized, brown Winnertzia with distinctive male genitalic structures, as follows ( Fig. 132 ). The elongate-oval gonostylus, which is 2.5 times as long as broad, has a pectinate claw of moderate size (↓ 4). The tegmen, which is fairly large in relation to the gonocoxae, has sharp contours, a truncate apex and distinct flaps (↓ 5). Of the gonocoxal synsclerite, the broadly V-shaped ventral emargination is shorter than half the gonocoxal length (↓ 6); and the dorsal apodemes, which are moderately long, have markedly convex bases (↓ 7). The aedeagal apodeme is twice-constricted, near the midlength and at the apex; the lateral extensions at the apex are short and weakly sclerotized, if at all present. The ninth tergite, which is markedly shorter than the gonocoxae, has a fairly broad posterior edge with a shallow indentation medially. Females and preimaginal stages of W. ruliki are unknown.

Other male characters. Body size 1.7–1.8 mm. Head. Eye bridge 2–3 ommatidia long dorsally. Antenna two thirds as long as body. Scape slightly larger than pedicel, both concolorous with flagellum. 12 flagellomeres, flagellomeres 1–9 with translucent sensilla. Fourth flagellomere: neck 0.7 times as long as node; node 1.9 times as long as broad; sensory hairs numerous; translucent sensilla filiform, lateral sensillum transversely aligned, occasionally Ushaped ( Fig. 133 ), medial sensillum longitudinally to obliquely aligned ( Fig. 134 ). Palpus slightly longer than head height, 4 setae-bearing segments; apical segment longest of all. Labella fully developed. Thorax. Pronotal setae 9–12. Anepimeral setae absent. Lateral mediotergal microtrichia large. Parascutellar area bright, sharply contoured. Wing markedly shorter than body, 2.3 times as long as broad. Costal cell reinforced. Both M 4 and CuA gently bent, extending to edge of wing. Legs with pointed scales. Basitarsal spines absent. Fore tibia slightly longer than T 2. Acropods: claws slightly bent, basal tooth large; empodia vestigial. Abdomen. Pleural membrane setose. Genitalia ( Fig. 132 ). Setae on ninth tergite confined to lateroposterior portions. Gonocoxal synsclerite slightly broader than long, little narrowed towards base; no unsclerotized area below ventral emargination; ventroanterior edge membranous; ventroposterior portions protruding slightly beyond dorsoposterior portions. Basolateral apophysis of gonostylus normal size, angulated. Solid basal portion of aedeagal apodeme long. Parameral apodemes long.

Etymology. This species is named after Björn Rulik, of Zoological Research Museum Alexander Koenig, Bonn, Germany, in appreciation of his help with the DNA barcoding of our specimens.

Type material. Holotype. Male , Sweden, Öland , Mörbylånga , Stora Dalby lund Nature Reserve, mixed broadleaf forest with plenty of dead ash trees, 9 July–8 August 2015, Malaise trap, M. & C. Jaschhof (spn CEC 3108 in NHRS) . Paratypes. 1 male, same data as the holotype (spn CEC 3110 in NHRS) ; 1 male, same data but 9 August–3 October 2015 (spn CEC 3109 in NHRS) ; 2 males, Öland, Mörbylånga, Gamla Skogsby (Kalkstad), mixed broadleaf forest with plenty of dead ash, 15 July–17 August 2015, MT, MCJ (spns CEC3112 – CEC 3113 in SDEI) ; 1 male, same locality but scrubby meadow at forest edge, 30 July–17 August 2015 (spn CEC 3111 in SDEI) ; 2 males, Öland, Mörbylånga, Västerstad elm forest NR, mixed broadleaf forest, 10 July–5 August 2014, MT, SMTP (trap 3002, collection event 3055) (spns CEC3114 – CEC 3115 in SDEI) .

Other material studied. Sweden: 1 male, Skåne, Malmö, Limhamns kalkbrott, 8–26 July 2009, MT , B.W. Svensson et al. (spn CEC 3116 in NHRS) ; 1 male, Uppland, Håbo, Biskops-Arnö, elm grove, 20 June–18 July 2005, MT, SMTP (trap 8, collection event 1602) (spn CEC 3117 in NHRS) .

Distribution and phenology. Adults of W. ruliki were collected in June–August (–October?) in different broadleaf forests in the southern half of Sweden (Skåne to Uppland).

Figures

FIGURES 128–134. Male morphology of Winnertzia pustulatula (128–131) and Winnertzia ruliki (132–134), holotypes. 128: Genitalia, ventral. 129: Gonostylus, ventral. 130: Fourth flagellomere, lateral. 131: Ditto, medial. 132: Genitalia, ventral. 133: Fourth flagellomere, lateral. 134: Ditto, medial. Scales for 128 and 130–134, 0.05 mm; for 129, 0.025 mm. Arrows refer to characters described in the diagnoses.