较新的2005年布歇特和洛克罗伊的腹足类分类，the families Umbraculidae and Tylodinidae belong to the superfamily Umbraculoidea , 1889, part of thecladeUmbraculida. Grande "et al." (2004) found Umbraculoidea to be a sister clade to the Cephalaspidea (Acteonoidea excluded).Th