Sergiusia is a monotypic moth genus of the family Noctuidae described by Nye in 1980. Its only species, Sergiusia pentelia, was described by Herbert Druce in 1887. It is known from Mozambique.Druce, H. (1887). "Descriptions of some new species of Lepidoptera Heterocera, mostly from tropical Africa". Proceedings of the Zoological Society of London. 1887: 668–686, pl. 55.

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