Vogel, R. M. and L. P. Schultz. 1970.Cargoa cupella, new genus and new species of nudibranch from Chesapeake Bay and the generic status of Okenia Menke, Idalia Leuckart and Idalla O/rsted. Veliger 12 388-393. [Stated date: 01 Apr 1970; true date: pre Apr 21.] {Included species}