... represent simplifications; those at nodes 3 and 11 may reflect reality. Figure drawn by E. Zipser and J. Fong. Numbered nodes are as follows: 1, Gastropoda; 2, “euomphalinae”; 3, “murchisoniinae”; 4, “hormotomoids”; 5, “cyrtostrophids”; 6, “goniostrophines”; 7, “omospirines”; 8, “loxonematides”; 9...

... ). The higher-order systematic position of superfamily Neomphaloidea is uncertain ( McArthur and Koop, 1999 ; Bouchet and Rocroi, 2005 ), a group also known collectively as the “Hot Vent Taxa,” sensu Ponder and Lindberg (1997) . Proposed suborder names have included Euomphalina, Neomphalina and Neomphaloidei...

...) suggested that the members of the superfamilies Macluritoidea and Onychochiloidea do not belong to his suborder Euomphalina but represent a separate lineage. In addition, Dzik (1983) , on the basis of his study of the early shell ontogeny of the onychochiloidean genus Mimospira Koken, 1925 , separated...