Canthidium (Canthidium) cupreum (Blanchard, 1846) Chaeridium cupreum Blanchard, 1846: 169 [transferred to Canthidium by Harold 1869a: 1004 (see also Harold 1869b: 57); here transferred to the subgenus Canthidium; type species of Eucanthidium]. Type locality: Bolivia: Santa Cruz: Vallegrande (“province de Valle Grande”). Type material: Syntypes probably at MNHN. Distribution: Brazil, Peru, Bolivia, and Argentina (Martínez & Halffter 1986a; including the type locality of C. orbiculatum). Choeridium orbiculatum Lucas, 1859: 103 (synonymized with C. cupreum by Gillet 1911: 55). Type material: Peru: Loreto: Ucayali: Sarayacu (“mission de Sarayacu”). Type material: Location of syntypes unknown. Canthidium aureolum Harold, 1867: 83 [synonymized with C. orbiculatum Lucas, 1859 by Harold 1869b: 57]. Type locality: Brazil: the Amazon region (“Die brasilianische, auch in dem Gebiete des Amazonenstromes von Bates gesammelte Art [...]”). Type material: Location of syntypes unknown (possibly at MNHN—ex Harold collection).

Published as part of Cupello, Mario, 2018, On the types species of the New World dung beetle genus Canthidium Erichson, 1847 (Coleoptera: Scarabaeidae: Scarabaeinae), with an annotated checklist of species, pp. 451-486 in Zootaxa 4388 (4) on pages 457-458, DOI: 10.11646/zootaxa.4388.4.1, http://zenodo.org/record/1189072