Teuchestes fossor is a species of dung beetle native to the Palaearctic, but is also widespread in North America following accidental introduction and naturalisation during European settlement.

It can be readily collected from the dung of livestock, and other large mammals[4] This species is known to support a number of key ecosystem services in cattle pastures.

Its typical colour is a uniform glossy black, although it can also rarely occurs in a dark red form where it may superficially resemble Acrossus rufipes.

[11] Adult beetles typically occur at low densities in mated pairs,[12] and mate-finding and anti-aggregation are thought to be mediated by pheromones.

[10] A number of studies have shown that coprophagous insects suffer a suite of lethal and sublethal effects in response to veterinary anthelmintic residues.