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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