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| Graptolithoidea | Graptolite Net | Graptolites & Graptoliters | Cephalodiscoidea | Rhabdopleuroidea | Crustoidea | Camaroidea | Tuboidea |
| ________________________________________________________________________________________ GRAPTOLITE NET is edited and periodically updated by Piotr Mierzejewski, the Count of Calmont and Countess Maja A. Korwin-Kossakowska since 2002 |
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| Hemichordata: Graptolithoidea |
| Mastigograptus from Ordovician erratic boulders |
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| updated July 7, 2005 |
| Calcareous erratic boulders of Baltic origin found in Pleistocene glacial deposits of Poland and Germany yield . |
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