Cushman, J. A. (1931). The Foraminifera of the Atlantic Ocean pt. 8: Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae, and Homotremidae. Bulletin of the United States National Museum. (104): 1-179.
The Foraminifera of the Atlantic Ocean pt. 8: Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae, and Homotremidae