Ctenostoma pygmaeum is a species of tiger beetle. This species is found in Brazil,Catalogue of Life: Ctenostoma pygmaeum where it inhabits the Southern Atlantic Forest.
Adults are brachypterous.A Treatise on the Western Hemisphere Caraboidea (Coleoptera)
Subspecies Ctenostoma pygmaeum pygmaeum - pygmy comb-mouthed beetle Ctenostoma pygmaeum concolor Naviaux, 1998 - uniform small comb-mouthed beetle
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