| Autor: |
R. W. Dortangs, J. van der Burgh, G. F. W. Herngreen, J.H.A. van Konijnenburg-van Cittert, R.W.J.M. van der Ham |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Review of Palaeobotany and Palynology. 127:77-97 |
| ISSN: |
0034-6667 |
| DOI: |
10.1016/s0034-6667(03)00095-2 |
| Popis: |
The original material of the Late Cretaceous conifer Pinites patens Miquel from the Maastrichtian type area is reexamined and a lectotype designated. Observation of numerous details in recently collected anatomically preserved leaves enables us to reinterpret this species as shoots with relatively large, multiveined spreading leaves with randomly arranged stomata and to rename it Brachyphyllum patens (Miquel) comb. nov. Leaf morphological features indicate that this species belongs to either the Araucariaceae (Araucaria) or the Cheirolepidiaceae (non-frenelopsids). Because randomly arranged stomata are unknown so far in the Araucariaceae, it is tentatively assigned to the Cheirolepidiaceae. The presence of Classopollis and the absence of Araucariaceae pollen in the type Maastrichtian is considered indirect strong evidence for a cheirolepidiaceous affinity. If Brachyphyllum patens belongs to the Cheirolepidiaceae, it might have been one of the last survivors of its stock. Being known from at least seven separate finds, Brachyphyllum patens is the most common conifer species in the area. The relatively large and flattened spreading leaves with numerous abaxial and adaxial stomata suggest a humid habitat. However, the thick cuticle with the sunken guard cells may have provided sufficient protection under xeric conditions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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