Bradysia arcana, MENZEL & MOHRIG, 1998

Menzel, Frank, Smith, Jane E. & Chandler, Peter J., 2006, The sciarid fauna of the British Isles (Diptera: Sciaridae), including descriptions of six new species, Zoological Journal of the Linnean Society 146 (1), pp. 1-147 : 39

BRADYSIA ARCANA MENZEL & MOHRIG, 1998

Literature: Donisthorpe (1927): 138 [in part as Sciara sp. ? (3)]; Menzel & Mohrig (1998): 355; Menzel & Mohrig (2000): 151.

New to British list.

Material examined: Oxshott , Surrey, 1 male, [26]. iv.1901, Donisthorpe leg. ( BMNH) .

Ecological notes: found in a site comprising heathland and pine woodland; collected with the ant Lasius fuliginosus . iv.

Taxonomic note: In contradiction to the original description by Menzel & Mohrig (1998) and the version in Menzel & Mohrig (2000) the apical spine group on the holotype has 10 spines [not 6–7]; they partially overlap because of their close grouping. Also the species has a hook-like tooth above the apical spine group that is set back on the dorsal side of the gonostyle. In the holotype the small tooth is only obvious on the left gonostyle. Bradysia fenestralis (Zetterstedt) does not have this tooth structure.