Fanti, Fabrizio, and Roberta Improta. “[Synonymical Note: Rhagonycha Angulatocollis A. Costa, 1858 = Rhagonycha Nigriceps (Waltl, 1838) (Coleoptera, Cantharidae)]”. Natural History Sciences, vol. 3, no. 1, June 2016, pp. 60-62, doi:10.4081/nhs.2016.283.