Teleostei >
Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Nothobranchiidae (African rivulines)
Etymology: Aphyosemion: Greek, aphye, -es, sardine, anchovy + Greek, semeion = mark, signal (Ref. 45335); plagitaenium: The species name, plagitaenium, means with an oblique band, in reference to the oblique - not vertical - red lower lineated pattern on male sides, sometimes forming a "chevron" pattern with upper sides (Ref. 83477).