Taxon - Odkazy a literatura
The Interim Register of Marine and Nonmarine Genera [1444305]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Cyclostrema Marryat, 1819]
Datum citace: 8. prosinec 2019
Paleobiology Database [8726]
Paleobiology Database [https://paleobiodb.org/] [jako Cyclostrema Marryatt, 1818]
Datum citace: 11. prosinec 2015