Image of Operculina discoidalis var. involuta Cushman 1921

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Operculina discoidalis var. involuta Cushman 1921

Operculina discoidalis involuta; Operculina discoidalis; Operculina; Nummulitidae; Rotaliida; Globothalamea; Retaria; Foraminifera (foraminifers); Rhizaria (rhizarians); SAR (Stramenopiles, Alveolates, Rhizaria); Cellular; Life (biota); Eukaryota (eukaryotes)