Rissoia is an incorrect subsequent spelling of Rissoa, however, Cossmann (1899) placed it in subgenus Galeodina, which is regarded as a synonym of Alvania.
original description(ofRissoia pissarroi Cossmann, 1899 †)Cossmann, M. (1899). Mollusques éocèniques de la Loire-inférieure. Tome 2e. Premier fascicule. <em>Bulletin de la Société des Sciences naturelles de l'Ouest de la France.</em> 9(4): 307-360, pl. 23-26., available online athttps://www.biodiversitylibrary.org/page/5857655 page(s): 344; Plate 25 (4), Figs 20-21 [details]
new combination referenceNew combination, herein. [details]