Description: A small (5-6.5mm) reddish-brown subterranean ground beetle. Found among leaves, under stones, etc. on riverbanks, lakeshores and on montane peat. Local.

NI account: Widely distributed in Ireland though rarely encountered.

Ecology: Said by some authors to be largely subterranean (Lindroth, 1985; Marggi, 1992), but the few Irish records give no indication of this. In Northern Ireland, it has been taken from moss in upland blanket peat and from litter on gravelly or sandy lakeshores and riverbanks.

Distribution: A Eurasian Wide-Boreal species (35) found across north-west, northern and eastern Europe to the River Lena in Siberia and introduced into eastern North America.

Similar Species: Trechus fulvus: colour pale; eyes reduced, flat

Key Identification Features:

• Sutural stria of elytra recurrent at apex (Fig. 35)
• Frontal furrows running round to the back of the eyes (Fig. 32)
• Elytra glabrous
• Hind angles of pronotum angulate, not denticulate
• Elytral striae impressed and punctate
• Eyes large, protruding

Distribution Map from NBN: Trechus rubens at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Trechus rubens at iNaturalist World Species Observations database.

GBIF data for Trechus rubens | Classification: Insecta, Coleoptera, Carabidae, Trechus

Thumbnails for genus Trechus