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|Lasius umbratus||Collingwood, C. A., 1979, The Formicidae (Hymenoptera) of Fennoscandia and Denmark., Fauna Entomologica Scandinavica 8, pp. 1-174: 101-102, (download)||101-102||6175|
|Lasius umbratus||Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae)., Zootaxa 936, pp. 1-68: -1, (download)||-1||21008|
Found most commonly in these habitats: 214 times found in heathlands, 178 times found in Unknown, 90 times found in Wet grassland, 76 times found in dry grassland, 54 times found in Forest, 52 times found in anthropogenic, 30 times found in Rocks (rocky-calcareous grasslands), 27 times found in dunes & inland dunes, 25 times found in cedar woodland, in soil under moss, 17 times found in mixed forest, litter under dead hardwood tree, ...
Found most commonly in these microhabitats: 13 times under rock, 6 times log stage 4, 4 times log stage 3, 2 times log stage 5, 2 times log stage 2, 2 times ground foraging, 1 times Bajo piedra, nido, 2 times under stone, 1 times on the ground, 1 times on road, 1 times log stage 5+, ...
Collected most commonly using these methods: 494 times pitfall trap, 51 times Manual catch, 39 times Color trap, 36 times Malaise trap, 22 times Berlese funnel, 8 times search, 5 times Window trap, 4 times Pyramid trap, 3 times Hand, 1 times Red color trap, 1 times Electronic trap, ...
Elevations: collected from 5 - 2896 meters, 1284 meters average
Type specimens: syntype of Lasius silvestrii osakana: casent0912287; syntype of Lasius umbratus exacutus: casent0911055; syntype of Lasius umbratus mixtoumbratus: casent0911054; type of Lasius umbratus: casent0903215