Foraminifera source details
Cushman, J.A. 1929. Some species of Siphogenerinoides from the Cretaceous of Venezuela. Contr. Cushman Lab. Foram. Res. 5: 55-59.
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Siphogenerinoides bramletti Cushman, 1929 † (original description)
Siphogenerinoides cretacea Cushman, 1929 † accepted as Orthokarstenia cretacea (Cushman, 1929) † (original description)
Siphogenerinoides parva Cushman, 1929 † accepted as Orthokarstenia parva (Cushman, 1929) † (original description)
Siphogenerinoides cretacea Cushman, 1929 † accepted as Orthokarstenia cretacea (Cushman, 1929) † (original description)
Siphogenerinoides parva Cushman, 1929 † accepted as Orthokarstenia parva (Cushman, 1929) † (original description)