Brevicornu canescens ( Zetterstedt, 1852 )

Kjaerandsen, Jostein, 2005, A review of fungus gnats in the tribe Exechiini (Diptera, Mycetophilidae) from the J. W. Zetterstedt collection at the Museum of Zoology in Lund, Sweden, Zootaxa 856, pp. 1-35 : 17-19

* Brevicornu canescens ( Zetterstedt, 1852) sp. restit. stat. n.

Mycetophila canescens Zetterstedt, 1852: 4365

Brachycampta griseicollis ; Lundström 1909: 25, figs 32 & 33 Allodia canescens ; Edwards 1924: 163

Allodia griseola ; Edwards 1925: 608

Allodia karpathica Landrock, 1928: 240

Brevicornu griseolum ; Zaitzev 1986: 171, fig. 53(1)

Brevicornu griseolum ; Zaitzev 2003: 132, figs 16(7–8)

Material. Holotype ( Fig. 4 ) male [SPM­005159, without coloured tag, labelled: M. canescens Z ď Nykyrk. XXX] – Sweden: ÖG, at Nykyrka, September 1851.

There is only one specimen in the collections referable to this name. Edwards (1924) treated it as a good species, larger but close to Brevicornu griseicolle ( Staeger, 1840) .

After Edwards (1924) B. canescens has been totally overlooked due to a mixing with B. griseolum ( Zetterstedt, 1852) [see below]. It is a large distinct species of Brevicornu Marshall, 1896 where the Cu­fork is positioned slightly beyond the M­fork. Hence, the species is reinstated with its original name and illustrated here as the first correct record from Sweden after the original description.

Figures

FIGURE 4. Male holotype of Brevicornu canescens (Zetterstedt, 1852) sp. restit. stat. n. – A. Terminalia in ventral view. – B. Tergite IX and cerci in dorsal view. – C. Internal face of right gonostylus, enlarged. Bars = 0.2 mm.