
| 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 |


| Edvard Johan Gerhard Holm (April 4, 1853 - June 21, 1926) |
