Ctenostoma ornatum is a species of tiger beetle. This species is found in Brazil,Catalogue of Life: Ctenostoma ornatum where it inhabits the southern Atlantic Forest.A Treatise on the Western Hemisphere Caraboidea (Coleoptera)
Subspecies Ctenostoma ornatum ornatum (Brazil) - ornate comb-mouthed beetle Ctenostoma ornatum werneri Naviaux, 1998 (Brazil) - Werner's comb-mouthed beetle
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