Taxon - Odkazy a literatura
Paleobiology Database [5816]
Paleobiology Database [https://paleobiodb.org/] [jako Protozaphrentis Yü, 1957]
Datum citace: 27. leden 2016
The Interim Register of Marine and Nonmarine Genera [1204868]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Protozaphrentis Yu, 1957]
Datum citace: 1. prosinec 2019