IRMNG Taxon list
- Cambraster tastudorum Jell et al., 1985 †
- Carneyella pileus (Hall, 1866) †
- Cincinnatidiscus stellatus (Hall, 1866) †
- Edriodiscus primotica Banks, Burrett, C F & Jell, 1985 †
- Epipaston ixine Holloway, D J & Jell, 1983 †
- Isorophus cincinnatiensis (Roemer, 1851) †
- Isorophus pannosus Holloway, D J & Jell, 1983 †
- Rhenopyrgus whitei Holloway, D J & Jell, 1983 †
- Stromatocystites pentangularis Pompeckj, 1896 †
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