Confidence: It's likely to be this, but I can't be certain.
Notes: Aphodius fimetarius was recently separated in to two species – Aphodius fimetarius and Aphodius pedellus. Can you please confirm that you distinguished between A. fimetarius and A. pedellus. The two species can be difficult to distinguish and requires examination under a microscope. The papers listed below will aid in their separation.
Wilson, C. J. 2001. Aphodius pedellus (DeGeer), a species distinct from A. fimetarius (Linnaeus) (Coleoptera: Aphodiidae). Tijdschrift voor Entomologie, 144(1), 137-143.
Miraldo, A., Krell, F. T., Smalen, M., Angus, R. B., & Roslin, T. 2014. Making the cryptic visible–resolving the species complex of Aphodius fimetarius (Linnaeus) and Aphodius pedellus (de Geer)(Coleoptera: Scarabaeidae) by three complementary methods. Systematic Entomology, 39(3), 531-547.
Fery, H., & Rössner, E. 2015. Notes on the Aphodius (s. str.) fimetarius-complex–morphology, taxonomy, nomenclature and worldwide distribution (with emphasis on the Iberian Peninsula, Austria and Germany) (Scarabaeoidea: Scarabaeidae: Aphodiinae). Linzer biologische Beiträge, 47(1), 459-489