Cyrtusa subtestacea is a species of round fungus beetle in the family Leiodidae. It is found in Europe and Northern Asia (excluding China) and North America.
Further reading
Revision der Nordamerikanischen Arten der Cyrtusa - Verwandtschaft (Coleoptera Leiodidae Leiodini). 1988. Daffner . Hermann. Annali del Museo Civico di Rovereto. 269–306. 1720-9161.