Katatopygia magna (Garrett, 1925) Garrett, 1925

Martinsson, Svante & Kjaerandsen, Jostein, 2012, Katatopygia gen. n., a monophyletic branch segregated from Boletina (Diptera, Mycetophilidae), ZooKeys 175, pp. 37-67 : 48-49

Katatopygia magna (Garrett, 1925) comb. n. Figs 1B11 A–D

Boletina magna Garrett, 1925: 5

Diagnostic characters.

Katatopygia magna is most similar to Katatopygia erythropyga and Katatopygia hissarica , but can be distinguished by having fused mesonotal stripes and on the apically broadened gonostylus on which the inner dentations are reaching the basal curve.

Re-description.

Male. Wing length 6.0 mm.

Head blackish brown; palps yellow. Antenna with scape brown, pedicel and flagellum yellow.

Thorax with black mesonotal stripes fused on yellow ground, humeral area yellow; antepronotum brown; anepisternum brown; preepisternum dark with a diffuse pale spot; laterotergite brown; mediotergite dark. Halter pale.

Wing pale with veins yellowish brown; M-petiole approximately 1.8 times the length of ta; Sc2 present; Sc ending in C clearly before Rs; Sc bearing a few setae on apical portion; C ending beyond apex of R5.

Legs pale yellow with joints darker.

Abdomen dark brown with yellow apical bands on tergite II–IV.

Terminalia yellowish. Gonocoxite with mesal corners not projected; gonostylus with broadened apex; gonostylus angled inwards about 65° and bearing one strong seta on interior surface, dentations on interior surface reaching curve. Apical processus approximately as long as the diameter of gonostylus and bearing one subapical seta. Hypandrial lobe deeply forked with four lobes. Dorsal fused paramere rod long and straight, without microtrichia. Tergite IX subrectangular, without sclerotized mesial suture.

Female unknown.

Distribution.

Nearctic: Canada, British Columbia.

Remarks.

Known only from the holotype.

Type material studied.

Holotype male. Canada: BC, Fernie, 24 Jul (year unknown pre 1925), leg. C. Garrett (CNC, pinned with cleared terminalia in glycerine in microtube on same pin, JKJ-SPM-057738).