Taxon - Odkazy a literatura
Paleobiology Database [25651]
Paleobiology Database [https://paleobiodb.org/] [jako Sphragiopora]
Datum citace: 30. leden 2016
The Interim Register of Marine and Nonmarine Genera [1204682]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Sphragiopora Ulrich in Miller, 1889]
Datum citace: 13. únor 2020