Tragocephala castnia is a species of beetle in the family Cerambycidae. It was described by James Thomson in 1857. It has a wide distribution in Africa. It feeds on Theobroma cacao.BioLib.cz - Tragocephala castnia. Retrieved on 8 September 2014.
Subspecies Tragocephala castnia castnia Thomson, 1857 Tragocephala castnia castniopsis Entwistle, 1963 Tragocephala castnia cacaoensis Entwistle, 1963 Tragocephala castnia islandica Entwistle, 1963 Tragocephala castnia theobromae Entwistle, 1963 Tragocephala castnia gorillaformis Entwistle, 1963 Tragocephala castnia leonensis Thomson, 1878
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