Taxon - Odkazy a literatura
The Interim Register of Marine and Nonmarine Genera [1088885]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Cyclostremiscus Pilsbry & Olsson, 1945]
Datum citace: 30. listopad 2019
Paleobiology Database [115780]
Paleobiology Database [https://paleobiodb.org/] [jako Cyclostremiscus Pilsbry & Olsson, 1945]
Datum citace: 24. prosinec 2015
Paleobiology Database [114956]
Paleobiology Database [https://paleobiodb.org/] [jako Ponocyclus]
Datum citace: 11. prosinec 2015