Ground Beetles of Ireland

Calathus ambiguus


Calathus ambiguus (Paykull, 1790)

Description: A moderately large (8.5 - 11.5 mm) dull, dark-brown species with pale appendages. Similar to Calathus erratus but broader and with the pronotum broadest behind the middle and with translucent margins.

World Distribution: Found across Europe to 60°N. Distribution Eurasian Wide-temperate (65).

Irish Status: Erroneously recorded by several authors for coastal localities in Ireland but discounted by Johnson & Halbert (1902). A single female was collected under driftwood on fore dunes by Tony Murray on 30 April 2009 (Anderson & Murray, 2010).

Ecology: Thermophilic on south-facing sparsely vegetated slopes or on coastal dunes.