ukbeetles.co.uk/sphaeroderma-spp Sphaeroderma rubidum: Body strongly rounded, often almost circular, pronotum very strongly narrowed from the base and very finely punctured. 2.3-3.5 mm.
Sphaeroderma testaceum: Body less strongly rounded, slightly but distinctly elongate, the pronotum less strongly narrowed from the base and more strongly punctured, especially towards the basal margin. 2.5-4.2 mm.
