Table 2. Fusulinid zones of Desmoinesian (DS) and Missourian (MS) in USA by Wilde (1990).
| Zone | Characteristic fauna |
| 8. Zone of Eowaeringella and Triticites of the Missourian (MC1). | Eowaeringella, Triticites |
| 7. Upper zone of Fusulina (DS5): | "Fusulina cylindrica" group. |
| 6. Lower zone of Fusulina (DS4): | Fusulina megista, F. acme, F. exima, Bartramella bartrami, Protriticites spp., Praeobsoletes spp. |
| 5. Upper zone of Beedeina (DS3) : | Beedeina girtyi, B. illinoisensis, B. similis, B. haworthi, Bartramella bartrami, Protriticites spp. Plectofusulina sp. |
| 4. Middle zone of Beedeina (DS2b): | Beedeina novamexicana, B. distenta, B. levicula |
| 3. Upper zone of Wedekindellina (DS2a): | Wedekindellina euthysepta, W. henbesty, W. excentrica, W. magna, W. ellipsoides |
| 2. Lower zone of Beedeina (DS1b): | Beedeina eurytensis, B. leei, B. pumila |
| 1. Lower zone of Wedekindellina (DS1a): | Wedekindellina euthysepta, Fusulinella iowensis, F. matura |