Katatopygia erythropyga (Holmgren, 1883) Holmgren, 1883

Martinsson, Svante & Kjaerandsen, Jostein, 2012, Katatopygia gen. n., a monophyletic branch segregated from Boletina (Diptera, Mycetophilidae), ZooKeys 175, pp. 37-67 : 45-48

Katatopygia erythropyga (Holmgren, 1883) comb. n. Figs 3 A–B6A–B7A–B10A–G

Boletina erythropyga Holmgren, 1883:189

Boletina longicornis Johannsen, 1911:272

Boletina notescens Johannsen, misident. in Zaitzev 1994:223 fig. 74:2

Boletina erythropyga Zaitzev & Polevoi 2002:640 figs 2, 4-6, 10

Diagnostic characters.

Most similar to Katatopygia magna and Katatopygia hissarica , but can be distinguished by having distinct and separated mesonotal stripes and on the evenly broad male gonostylus on which the inner dentations are reaching the basal curve.

Re-description.

Male. Wing length 5.5 mm.

Head blackish brown; mouthparts and palps yellow. Antenna with scape, pedicel and basal part of first flagellomere pale yellow, rest of flagellum brown.

Thorax with three distinct, black mesonotal stripes on yellow ground, humeral area yellow; antepronotum pale; anepisternum brown; preepisternum pale with ventral half darker, brown; laterotergite brown with anterior part paler; mediotergite pale with a broad dark central stripe. Halter pale.

Wing pale with veins yellowish brown; M-petiole approximately 1.5 times the length of ta; Sc2 present; Sc ending in C slightly 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 tergites II–VI.

Terminalia brownish. Gonocoxite with mesal corners not projected; gonostylus evenly broad, angled inwards about 40° and bearing one strong seta on interior surface, dentations on interior surface reaching curve. Apical processus approximately as long as the diameter of gonostylus, bearing one apical seta. Hypandrial lobe deeply forked with four lobes. Dorsal fused paramere rod long, slender and without microtrichia. Tergite IX subrectangular, with 4 stronger setae on apical part and without a sclerotized mesial suture.

Female. Body length 6.0 mm; wing length 5.5 mm. Coloration as male.

Terminalia. Tergite IX broad with sharp apicolateral corner; gonocoxite VIII slightly incised ventrally bearing many strong apical setae; gonapophysis IX short and blunt.

Distribution.

Holarctic, with records from north-western USA (Idaho) ( Johannsen 1911), northern Europe (Scandinavia and northern parts of European Russia) (Zaitzev and Polevoi 2001) and Novaya Zemlya ( Holmgren 1883).

Remarks.

The species has been confused with Katatopygia sahlbergi and there are some records e.g. from the Alps and Siberia that at least partly refer to the latter species (Zaitzev and Polevoi 2001).

Type material.

We were not able to locate the holotype of Boletina longicornis in the Johannsen collection at Cornell University (CUIC), nor can it be found in American Museum of Natural History (AMNH) (V. Blagoderov pers. com.) and should probable be regarded as lost.

Material examined.

NORWAY: FV, Alta, Elby, Valsetmoen, sandy slope, 10 Jun-6 Jul 1995 (ZMUN, leg. L.O. Hansen & H. Rinden) - 1 male. SWEDEN: LU, Jokkmokk, Messaure, 2 Sep-4 Oct 1971 (MZLU, leg. K. Möller) - 3 males; Luottåive NR, 28 km S Jokkmokk, 14 Jul-18 Aug 2004 (MZLU, leg. K. Hedmark & J. Kjærandsen) - 1 male; Gällivare, Haapavaara/Annavaara, 8 km WNW Vettasjärvi, 1 Jun-26 Jul 1994 (MZLU, leg. R. Rova) - 1 female, 3 male; SÖ, Haninge, Tyresta National Park, 19 Jun-28 Jul 2000 (NHRS, leg. B. Viklund) - 1 male; TO, Kiruna, Abisko, 150-500 m W Naturv. stn., 18-25 Aug 1975 (MZLU, leg. K. Möller) - 1 male; LF-05, 150-500 m W Naturv. stn., 28 Jun-5 Jul 1976 (MZLU, leg. K. Möller) - 2 males; above tree limit 26 Jun-15 Jul 2006 (NHRS, Leg. Swedish Malaise Trap Project) - 1 female, 10 males; VB, Skellefteå, Stenträsk, Björnhultet Domänreservat, 17 May-17 Oct 1997 (NHRS, leg. B. Viklund) - 4 males.