The Sharp Stigma Looper (Ctenoplusia oxygramma) is a moth of the Noctuidae family. It is found in southern Ontario, the eastern parts of the United States to Arizona. It has also been reported from Kansas, Nebraska, Iowa, Wisconsin, Mexico, the Antilles and from California south to Brazil and northern Argentina. The wingspan is about 35 mm. Recorded food plants include Aster, Erigeron canadensis, Nicotiana tabacum and Solidago.