Voltinia Stichel, 1910

Zhang, Jing, Cong, Qian, Shen, Jinhui, Opler, Paul A. & Grishin, Nick V., 2021, Genomics-guided refinement of butterfly taxonomy, The Taxonomic Report of the International Lepidoptera Survey 9 (3), pp. 1-55 : 20

Ionotus Hall, 2005 and Voltinia Stichel, 1910 are subgenera of Cremna Doubleday, 1847 , which is a valid genus

A genus comprised of two species, Voltinia Stichel, 1910 (type species Esthemopsis (?) radiata Godman & Salvin, 1886) (Fig. 17 gray) is a close sister to Cremna Doubleday, 1847 (type species Papilio actoris Cramer, 1776 ), which also consists of only two species: the type and Cremna heteroea Bates, 1867 (Fig. 17 purple); and Ionotus Hall, 2005 (type and the only species Hamanumida alector Geyer, 1837 ) (Fig. 17 olive) is sister to them combined. Hence, we reinstate Cremna as a valid genus (not a synonym of Napaea ), and due to genetic similarities place Ionotus Hall, 2005 and Voltinia Stichel, 1910 as its subgenera.