Ctenostoma erwini, or Erwin's comb-mouthed beetle, is a species of tiger beetle. This species is found in Panama,Catalogue of Life: Ctenostoma erwini where it inhabits low- to midland rainforests and cloud forests.
Larvae have been recorded from burrows in twigs and small branches.A Treatise on the Western Hemisphere Caraboidea (Coleoptera)
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