| Kozlowskitubus Mierzejewski, 1978 |
 |
| Diagnosis: "The encrusting-dendroid colonies are attached to the substrate with a discoidal thecorhiza comprising a bottle-shaped sicula at the center. The system of stolons makes a spiral within the thecorhiza, prolonged into the branches. The irregular branches comprise both the thecal bunches arising from thecorhiza and thecae formed at the branches themselves. The autothecae lack any apartuaral apparatus." (Mierzejewski 1978, p. 571). Occurence. - Poland: Ordovician and Silurian erratic boulders; Sweden, Gotland: upper Wenlock. Species assigned: Only the type species. |
| Type species: Dendrotubus erraticus Kozłowski, 1963 |
|
| References: Kozłowski, R. 1963. Le development d'un graptolite tuboide. - Acta Palaeontologica Polonica 8, 2, 103-134. Mierzejewski, P. 1978. Tuboid graptolites from erratic boulders of Poland. - Acta Palaeontologica Polonica 23, 4, 557-575. Mierzejewski, P. 1988. Encrusting graptolites from the Mulde Beds of Gotland. - Acta Palaeontologica Polonica 33, 3, 261-266. Urbanek, A. 1979. Ultrastructure of the sicula in the tuboid graptolite Kozlowskitubus erraticus (Kozlowski, 1963). - Acta Palaeontologia Polonica 24, 4, 493-503. |
 |
| Holotype; erratic boulder from Poland, Ordovician. From Kozłowski. |
 |
| m |
| a |
 |
| To the left is a young rhabdosome composed of a sicula, an autotheca and a bitheca from the Wenlock of Gotland; heigth 0.39 mm. From Mierzejewski. To the right is a diagrammatic sketch of a sicula. From Urbanek, modified. Abbreviations: a- 1st autotheca; h- helical line; m- metasicula; p- prosicula; po- porus of foramen for the first blastozooid; s- prostolon. |
| Order Tuboidea |
| GRAPTOLITE NET is edited by Piotr Mierzejewski, the Count of Calmont and Countess Maja A. Korwin-Kossakowska since 2002 |
 |
 |
| Portal of Graptolites and Pterobranchs sponsored by M.M. plus M. SZTANDARY |
| p |
| po |
| h |
| m |
| Graptolite Net | Graptolites & Graptoliters | Crustoidea | Tuboidea | Rhabdopleuroidea | Cephalodiscoidea |
 |
 |