Formica exsecta Nylander

Collingwood, C. A., 1979, The Formicidae (Hymenoptera) of Fennoscandia and Denmark., Fauna Entomologica Scandinavica 8, pp. 1-174: 129-130

publication ID

6175

persistent identifier

http://treatment.plazi.org/id/FD063E23-18DF-D0F9-0015-B7C1EEA3D3BA

treatment provided by

Christiana

scientific name

Formica exsecta Nylander
status

 

50. Formica exsecta Nylander  HNS  , 1846 Figs. 201, 202,208,212, 214, 217.

Formica exsecta Nylander  HNS  , 1846a: 909.

Worker. Bicoloured with gaster dark brown, rest of body reddish with varying amount of dark colour on head and promesonotum. Head strongly excised posteriorly; maxillary palps 6 segmented, long as half head length. Scale strongly emarginate. Eyes with very distinct erect hairs which are normally abundant. Body pilosity variable - erect hairs on all gaster tergites, on clypeus and on dorsum of head, sometimes also on occipital margins. Clypeus not impressed. Length: 4.5-7.5 mm.

Queen. As worker, head normally somewhat darker and promesonotum more or less dark brown. Head pilosity very variable but eyes always distinctly haired. Length: 7.5-9.5 mm.

Male. Dark brownish black, appendages yellowish to brown. Head broadly emarginate, scale excised. Eyes with distinct but sparse hairs. Maxillary palps 6 segmented, long. Length: 6.2-9.0 mm.

Distribution. Throughout Denmark and Fennoscandia, very common. - Local in Southwest England and Scottish Highlands. - Range: Central Spain to Urals, Appenines to extreme north of Europe.

Biology. This is an active aggressive species building mounds of leaf litter in open woodland, moorland and rough pasture. On disturbance the ants swarm out and bite vigorously. Nests may contain a thousand or more workers with more than one queen. They are often grouped with amicable interchange of workers between each. F. exsecta  HNS  is mainly aphidicolous tending aphids on Juniperus, Picea and other trees but is also predaceous. Colonies extend by nest splitting but single queens also start colonies by securing acceptance in nests of Formica lemani  HNS  or F. fusca  HNS  . Alatae occur in July.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Formica