Canthidium (Canthidium) ardens Bates, 1887

Canthidium ardens Bates, 1887: 48 [here transferred to the subgenus Canthidium]. Type locality: Nicaragua: Chontales, and Panama: Chiriquí: Bugaba: Volcán (“Nicaragua, Chontales [...]; Panama, Bugaba, Volcan de Chiriqui”). Type material: Unknown number of syntypes of both sexes (BMNH). Distribution: From Mexico to Panama (Kohlmann & Solís 2006a).

Canthidium ardens mutatum Bates, 1887: 48, new synonymy [except for Blackwelder (1944), this name has been overlooked by all authors since its establishment. Nonetheless, it is clearly available as Bates presented a proper description for it (“ Var. C. mutatum [under Canthidium ardens]. Saturate viridi-aeneum, splendidum; corpore subtus et pedibus concoloribus”) and treated the taxon as a “local variety” of C. ardens differing only by colour. Since Kohlmann & Solís (2004a), in their revision of the Canthidium from Costa Rica, considered both green and red specimens as conspecifics, and because the only difference noted by Bates concerns the green colouration of his specimen, I chose to treat C. mutatum as a junior synonym of C. ardens]. Type locality: Costa Rica. Type material: Holotype unsexed (MNHN—ex Bates collection).

Canthidium rhodopus Bates, 1887: 48 [synonymized by Kohlmann & Solís 2006a: 244]. Type locality: Guatemala: Petén: Zapote Bobal (“ Guatemala, Zapote ”). Type material: Two syntypes (BMNH) .