Turriplaca ovalis (Croome, 1987) Cavalier-Smith, 2012
basionym Pinaciophora ovalis Croome (1987b)
(synonym Rabdiophrys ovalis Roijackers and Siemensma, 1988)
Metaheleopera
M. ovalistoma – after Bartos, 1963 Metaheleopera Bartos, 1963 Diagnosis: Shell clearly narrowing towards the pseudostome, which can be seen even more clearly on the narrower sides