Taxon - Odkazy a literatura
Paleobiology Database [29324]
Paleobiology Database [https://paleobiodb.org/] [jako Helenathyris]
Datum citace: 30. leden 2016
The Interim Register of Marine and Nonmarine Genera [1031950]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Helenathyris]
Datum citace: 30. listopad 2019