Ctenostoma nigrum is a species of tiger beetle. This species is found in Bolivia, Colombia, Ecuador, Peru and Brazil,Catalogue of Life: Ctenostoma nigrum where it inhabits rainforests and cloud forests.A Treatise on the Western Hemisphere Caraboidea (Coleoptera)
Subspecies Ctenostoma nigrum nigrum (Bolivia, Colombia, Ecuador, Peru, Brazil) - black comb-mouthed beetle Ctenostoma nigrum lecourti Naviaux, 1998 (Bolivia, Peru) - Lecourt's comb-mouthed beetle
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