Semiognatha is a monotypic genus of beetles in the family Buprestidae, tribe Stigmoderini, the jewel beetles. The sole species, Semiognatha sainvali, was described in 2004 from a specimen collected in Brazil.Moore, T. and T. Lander. (2004). Género y especie nuevas de la tribu Stigmoderini (Coleoptera): Buprestidae) en América. Revista Chilena de Entomología (Chile) 30(1) 17-19.
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