• Neomicroantyx ingridae Mostler in Krainer et al., 1994 † (unaccepted > nomen nudum)
• Protocaudina acmaea Matyja, 1972 † accepted as Palaeocaudina acmaea (Matyja, 1972) †
• Protocaudina antyx Kristan-Tollmann, 1964 † (uncertain > nomen dubium)
• Protocaudina dorsetensis Soodan & Whatley, 1988 † accepted as Palaeocaudina dorsetensis (Soodan & Whatley, 1988) †
• Protocaudina herrigi Reich, 1995 † accepted as Palaeocaudina herrigi (Reich, 1995) †
• Protocaudina khadirensis Soodan, 1977 † accepted as Palaeolaetmogone khadirensis (Soodan, 1977) †
• Protocaudina latifolia Mostler, 1972 † (unaccepted > nomen nudum)
• Protocaudina mortenseni Deflandre-Rigaud, 1946 † accepted as Palaeolaetmogone mortenseni (Deflandre-Rigaud, 1946) †
• Protocaudina paucispinosa Deflandre-Rigaud, 1961 † (unaccepted > nomen nudum)
• Protocaudina paucispinosa Deflandre-Rigaud, 1962 † accepted as Palaeolaetmogone mortenseni (Deflandre-Rigaud, 1946) †
• Protocaudina rigaudae Mostler, 1970 † accepted as Palaeolaetmogone rigaudae (Mostler, 1970) †
• Stichopites mortenseni Deflandre-Rigaud, 1952 †
• Stichopites spinosus Frizzell & Exline, 1956 †