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The Ordovician acritarch genus Pachyshaeridium Burmann 1970: new, revised and reassigned species
| Ribecai, C. and Tongiorgi, M. | |
| 1999 | |
| Palaeontographia Italica, v.86 (1999), p.113-153. | |
| The Ordovician acritarch genus Pachyshaeridium Burmann 1970: new, revised and reassigned species |
Ribecai, C. and Tongiorgi, M., 1999: The Ordovician acritarch genus Pachyshaeridium Burmann 1970: new, revised and reassigned species.Palaeontographia Italica, v.86 (1999), p.113-153.