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New dinoflagellate cyst species of the Microdinium and Phanerodinium Complexes (Evitt) from the Upper Cretaceous-Lower Paleogene Chalk Groupin the Meer borehole, northern Belgium
Slimani, H.; Louwye, S. (2011). New dinoflagellate cyst species of the Microdinium and Phanerodinium Complexes (Evitt) from the Upper Cretaceous-Lower Paleogene Chalk Groupin the Meer borehole, northern Belgium. Rev. Palaeobot. Palynol. 168(1): 41-50. dx.doi.org/10.1016/j.revpalbo.2011.09.009
In: Review of Palaeobotany and Palynology. Elsevier: Tokyo; Oxford; Lausanne; New York; Shannon; London; Amsterdam. ISSN 0034-6667; e-ISSN 1879-0615, meer
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| Trefwoorden |
Geological time > Phanerozoic > Geological time > Cenozoic > Paleogene > Paleocene > Danian
Geological time > Phanerozoic > Geological time > Mesozoic > Cretaceous > Cretaceous, Upper > Campanian
Dinoflagellata [WoRMS]
Belgium, Meer
Marien/Kust |
| Author keywords |
dinoflagellate cysts; taxonomy; Campanian-Danian; biostratigraphy;northern Belgium |
| Auteurs | | Top |
- Slimani, H.
- Louwye, S., meer
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| Abstract |
A high-resolution palynological study of the Campanian to Danian Chalk Group from the Meer borehole in northern Belgium has revealed the presence of four new smaller organic-walled dinoflagellate cyst species previously left in open nomenclature, within rich, diverse and well-preserved assemblages. A formal description of the new species, an emendation of Phanerodinium fourmarieri Lejeune-Carpentier based on a comparison of well preserved specimens with the type material, and as a result a re-assessment of the stratigraphic occurrences of each of these species are provided. Druggidium discretum sp. nov. is characterized by a finely spongeous wall surface and a discreet indication of tabulation, while Druggidium meerensis sp. nov. is suturocavate with a granulate, vermiculate to rarely pseudoreticulate ornamentation. Gillinia denticulata sp. nov. is distinguishable by its high and denticulate crests. Phanerodinium belgicum sp. nov. has a microgranulate to vermiculate surface wall and membranous crests. We retain Phanerodinium fourmarieri in the genus Phanerodinium, and reject the transfer of the species to the genus Druggidium by Lejeune-Carpentier and Sarjeant, as we demonstrate that the ventral surface of the species is untabulated and that the anterior intercalary plates are lacking. Both features are characteristic of every Phanerodinium species. |
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