• Eoconuloides lopeztrigoi (Palmer, 1934) † accepted as Tremastegina lopeztrigoi (Palmer, 1934) †
• Eoconuloides parvulus (Cushman, 1919) † accepted as Amphistegina parvula (Cushman, 1919) †
• Eoconuloides senni (Cushman, 1945) † accepted as Tremastegina senni (Cushman, 1945) †
• Eoconuloides senni var. conicus Caudri, 1996 †
• Eoconuloides wellsi Cole & Bermúdez, 1944 † accepted as Helicostegina wellsi (Cole & Bermúdez, 1944) †
• Helicostegina dimorpha Barker & Grimsdale, 1936 †
• Helicostegina gyralis Barker & Grimsdale, 1936 †
• Helicostegina jamaicensis Mitchell, E. Robinson & Özcan in Mitchell et al., 2022 †
• Helicostegina jeannemairae E. Robinson, Mitchell & Özcan in Mitchell et al., 2022 †
• Helicostegina minor Mitchell, E. Robinson & Özcan in Mitchell et al., 2022 †
• Helicostegina polygyralis (Barker, 1932) †
• Helicostegina soldadensis Grimsdale, 1941 † accepted as Helicosteginopsis soldadensis (Grimsdale, 1941) †
• Helicostegina wellsi (Cole & Bermúdez, 1944) †
• Tremastegina lopeztrigoi (Palmer, 1934) †
• Tremastegina roestae (Visser, 1951) † accepted as Praestorrsella roestae (Visser, 1951) †
• Tremastegina senni (Cushman, 1945) †