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| Order Dendroidea, Family: Pseudodictyonemidae Pseudodictyonema heyi Chapman, Rickards & Grayson, 1993 |
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| Diagnosis: "Large conical colony, at least 110 mm by 100mm, with undulating robust stipes, subparallel and united by common but irregular disspiments and irregular anastomosis. Stipes compound, spaced at 6-8 in 10mm and difining a fairly regular meshwork together with stipe branching and connections (either dissepiments or anastomosis) at a spacing of 1-3 in 10mm." From Chapman, Rickards & Grayson, 1993. Occurence: Dinantian - Namurian of Britain. The last known British graptolite. See also: Diagrammatic illustrations of Dictyonema. >> |
| Source: THE CARBONIFEROUS DENDROID GRAPTOLITES OF BRITAIN AND IRELAND. - A.J. Chapman, R.B. Rickards and R.F. Grayson - Proceedings of the Yorkshire Geological Society 1993, 49, 4, 295-319. |
| Holotype. Richmond, Yorkshire. Scale bar 0.5cm. |
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| Edited by Piotr Mierzejewski, the Count of Calmont and Countess Maja A. Korwin-Kossakowska since 2002 |
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