ActinocyclusActinocyclus is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod molluscs in the family Actinocyclidae, and was first described by Christian Gottfried Ehrenberg in 1831.SpeciesSpecies in the genus Actinocyclus include:Actinocyclus papillatus Actinocyclus verrucosus Ehrenberg, 1831