Laevitubulus
- Citations total:
- 2
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| original | Late Wenlockian | Wales(Glamorgan) | Burgess,N.D. et al. Classification of Uppermost Ordovician to Lower Devonian tubula and filamentous macerals from the Anglo-Welsh Basin. | 1991 | |
| details | Silurian | Devonian | Nd | Edwards,D. et al. Miscellaneous. 13F: Older plant macerals (excluding spores). (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) | 1996 |