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Figs. 114, 115.
Worker. Dark brownish red to black with legs and antennae paler; body hairs sparse; microsculpture on head and alitrunk dense, giving somewhat opaque appearance; gaster shining. Clypeus not projecting forward beyond mandibular insertions, middle of front border incised; in the larger examples the cleft is deep, giving a bidentate appearance. Mandibles broad with five distinct teeth. In profile dorsum of alitrunk rather flat, propodeum with steep descending basal face; petiole broadly oval in front view. Length: variable 4-9 mm.
Queen. Similar in appearance with long steeply descending basal face of propodeum. Length: 8-10 mm.
Male. Brownish black; clypeal emargination shallow, sometimes indistinct; petiole shallowly emarginate, low and thick in profile. Wings pale except for yellowish front border and stigma of fore-wing. Mandibles with apical tooth only. Length: 7-8 mm.
Distribution. Sweden: Vastmanland, where Forsslund (1957) found it locally in old oak trees. Very rare. - Range: Central and South Europe, Portugal to Ukraine and Morocco to Poland.
Biology. This species lives in small colonies of 30-50 individuals under bark or in dead wood of old trees up to 2 m or more above ground in open deciduous woodland or parkland. Workers forage singly and are fugitive. Alatae have been recorded in early summer, May and June.
Found most commonly in these habitats: 1 times found in Pinar, 2 times found in Estanque rodeado de Q. Pyrenaica, 2 times found in garden, 1 times found in Q. pyrenaica, C. sativa, 1 times found in Quercus forest, 1 times found in semi-open garden, 1 times found in Encinar (Dehesa), 1 times found in stone wall near lake, 1 times found in trees along river, 1 times found in village, ...
Found most commonly in these microhabitats: 1 times Troncomuerto de pino, 2 times Agalla de cinípido, 2 times on shrubs, 1 times On wooden construction, 1 times on stones under tree, 1 times Nest under bark (Q. Pyrenaica), rotten log, 1 times in large log, 1 times in grass nr. Tree, 1 times foraging on plant, 1 times Corteza de Pinus Pinea, 1 times Sobre encina, ...
Collected most commonly using these methods: 8 times Hand, 7 times search, 1 times pit-fall trap.
Elevations: collected from 30 - 1300 meters, 583 meters average
Type specimens: syntype of Camponotus marginatus ruzskyi: casent0905398