Taxon - Links and literature
Paleobiology Database [115970]
Paleobiology Database [https://paleobiodb.org/] [as Cryptogemma Dall, 1918]
Data retrieved on: 13 December 2015
Paleobiology Database [115912]
Paleobiology Database [https://paleobiodb.org/] [as Pinguigemmula MacNeil, 1960]
Data retrieved on: 25 January 2018
The Interim Register of Marine and Nonmarine Genera [1341986]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Cryptogemma Dall, 1918]
Data retrieved on: 30 November 2019