Plinthograptis clyster is a species of moth of the Tortricidae family. It is found in Nigeria. The wingspan is about 9 mm. The ground colour of the forewings is leaden grey with a broad orange-yellow costal fascia which is dotted with black. There is a red pattern consisting of a basal group of three oblique markings, a median group consisting of a row of four spots and a similar median row. The apex is finely black edged. The hindwings are dark grey.