Ctenostoma brunneum, the brownish comb-mouthed beetle, is a species of tiger beetle. This species is found in Ecuador,Catalogue of Life: Ctenostoma brunneum where it inhabits mid-altitude rainforests.A Treatise on the Western Hemisphere Caraboidea (Coleoptera)
Adults are medium-sized (10 mm) and have a dark reddish brown colour. Its appearance is similar to the closely related species Ctenostoma immaculatum.The Tiger Beetles of Ecuador: Their Identification, Distribution And Natural History (Coleoptera: Cicindelidae)
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