additional sourceRampal J. (2014). <i>Cavolinia gibbosa</i> group (holoplanktonic Opisthobranchia, Euthecosomata): systematics and problems of synonymy (comment on Arie W. Janssen, 2012). <em>Bollettino Malacologico.</em> 50: 1-10., available online athttps://www.biodiversitylibrary.org/page/52919639[details] Available for editors