IRMNG Taxon list
- Calyculus cribrum D. Noël, 1973 †
- Carinolithus clavatus (Deflandre in Deflandre & Fert, 1954) Medd, 1979 †
- Carinolithus sceptrum (Deflandre in Deflandre & Fert, 1954) Medd, 1979 †
- Carinolithus superbus (Deflandre in Deflandre & Fert, 1954) Prins in Grün et al., 1974 †
- Proculithus charlottei A.W. Medd, 1979 †
- Proculithus expansus A.W. Medd, 1979 † accepted as Triscutum expansus (A.W. Medd, 1979) H.J. Dockerill, 1987 †
- Proculithus fistulatus B. Prins, 1969 ex A.W. Medd, 1979 †
- Vikosphaera noeliae Goy in Goy et al., 1979 †
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