Taxon - Links and literature
Paleobiology Database [25782]
Paleobiology Database [https://paleobiodb.org/] [as Calpensia]
Data retrieved on: 11 December 2015
The Interim Register of Marine and Nonmarine Genera [1437144]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Calpensia Jullien, 1888]
Data retrieved on: 30 November 2019