Taxon - Odkazy a literatura
Paleobiology Database [31184]
Paleobiology Database [https://paleobiodb.org/] [jako Allanicytidium]
Datum citace: 30. leden 2016
Paleobiology Database [31211]
Paleobiology Database [https://paleobiodb.org/] [jako Placocystella]
Datum citace: 30. leden 2016
The Interim Register of Marine and Nonmarine Genera [1196657]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Allanicytidium Caster & Gill, 1967]
Datum citace: 30. listopad 2019
The Interim Register of Marine and Nonmarine Genera [1102808]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Placocystella Rennie, 1936]
Datum citace: 8. prosinec 2019
Dominguéz Alonso P., Jefferies R. P. S., Gil Cid D. (2002): An annotated check-list of genera and species of carpoids, Coloquios de Palcontologia, 53: 33-68 [jako Allanicytidium Caster & Gill, 1967]Datum citace: 9. leden 2016
Dominguéz Alonso P., Jefferies R. P. S., Gil Cid D. (2002): An annotated check-list of genera and species of carpoids, Coloquios de Palcontologia, 53: 33-68 [jako Placocystella Rennie, 1936]Datum citace: 9. leden 2016