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|Subspecies of Formica fusca: Müller, 1923b PDF: 139; Santschi, 1925g PDF: 352; Novák & Sadil, 1941 PDF: 107.|
Worker. Greyish to brownish black, legs paler. Short stout hairs present on promesonotum normally numerous but occasionally abraded or few. Underside of mid and hind femora normally with one or more hairs at mid length. Frons coarsely sculptured to that punctures readily seen under ordinary magnification. Length: 4.5-7.0 mm.
Queen. Colour, sculpture and pilosity as worker but scutellum shining and pronotal hairs numerous, extending round side margins to tegulae. Long hairs on underside of mid femora always present. Length: 7.0-9.5 mm.
Male. Black with appendages yellowish or brownish. Scale with conspicuous long hairs overreaching dorsal crest, most numerous at angulate side corners. Gaster with short adpressed pubescence. Length: 8.0-9.0 mm.
Distribution. Throughout Fennoscandia except extreme southern areas of Finland and Sweden, not recorded from Denmark. - Abundant in British Isles except for Southeast. - Range: mountains of Spain to Japan including Himalayas, Appenines to arctic Fennoscandia.
Biology. This is an abundant upland species in Europe not distinguished from F. fuscaHNS until Bondroit (1917) and first clearly described by Yarrow (1954). It has similar habits to F. fuscaHNS but sometimes occurs in large multi-queened colonies in favourable sites such as stony banks. Colony founding is either by single queens or by nest fission. Alatae fly in July and August.
Found most commonly in these habitats: 45 times found in Unknown, 7 times found in alpine meadow, 7 times found in bogs & fenns, 3 times found in P.mugo, Abies, Rododendrum, 3 times found in Spruce-fir-larch forest, 2 times found in Heath, 2 times found in P.mugo, Abies, 2 times found in Hedgerow, 1 times found in P. sylvestris, Betula, Juniperus, 1 times found in larch taiga/tundra, ...
Found most commonly in these microhabitats: 5 times under stone, 5 times on the ground, 2 times nbp, 3 times in rotten log, 3 times under rock, 2 times ground foragers, 1 times log stage 3, 1 times ground forager(s), 1 times colony under stone, 1 times Base of pine tree, 1 times under boulder, ...
Collected most commonly using these methods: 16 times search, 9 times Hand, 10 times Manual catch.
Elevations: collected from 221 - 2250 meters, 1777 meters average