Projects per year
Abstract
A diverse Eocene charophyte flora from a section at Gánt (Vértes Hills),
Transdanubian Central Range, north-western Hungary, provides
significant new information building on previous studies based only on
sub-surface data published from the mid-twentieth century. This newly
acquired material facilitates the taxonomic revision and emendation of
the species Raskyella peckii and thereby defines a new anagenetic
lineage based on three successive varieties that were formerly
considered as separate species or subspecies: Raskyella peckii var. peckii (early Lutetian–early Bartonian), Raskyella peckii var. caliciformis (early Bartonian), and Raskyella peckii var. vadaszii (late Bartonian). Based on this lineage, we propose a new local charophyte biozonation that consists of a ‘Raskyella peckii Superzone’ (Lutetian–Bartonian), sub-divided into three successive charophyte partial range zones: the ‘Raskyella peckii peckii Zone’ (Lutetian–lower-most Bartonian) characterized by an assemblage of R. peckii peckii, Gyrogona caelata forma caelata, G. caelata forma monolifera and Nitellopsis (Tectochara) aff. palaeohungarica, the ‘Raskyella peckii caliciformis Zone’ (lower Bartonian) characterized by the assemblage of R. peckii var. caliciformis, G. caelata forma caelata, G. caelata forma monolifera, G. caelata forma baccata, Nitellopsis (Tectochara) aff. palaeohungarica and Chara media, and the ‘Raskyella peckii vadaszii Zone’ (upper Bartonian) characterized by R. peckii var. vadaszii, G. caelata forma bicincta, G. caelata forma baccata, G. caelata forma fasciata, G. tuberosa, Psilochara polita, Psilochara sp., Chara media and Chara subcylindrica.
Future research may show the new local biozonation as applicable to the
whole of Europe and complementary to the current European charophyte
biozonation. Our results show that the sequences from Gánt, which were
previously regarded as upper mid-Eocene (upper Lutetian–lower Bartonian)
in age, appear to represent a longer chronostratigraphic interval:
lower Lutetian to upper Bartonian. Our chronostratigraphic results imply
a longer and more stepwise Eocene major transgression in the
Transdanubian Central Range than previously thought.
Original language | English |
---|---|
Pages (from-to) | 541-563 |
Number of pages | 23 |
Journal | Journal of Systematic Palaeontology, Taylor & Francis |
Volume | 19 |
Issue number | 7 |
DOIs | |
Publication status | Published - 26 Jun 2021 |
Austrian Fields of Science 2012
- 105117 Palaeobotany
- 105123 Stratigraphy
- 105118 Palaeontology
Keywords
- Characeae
- Raskyellaceae
- Paleogene
- Eocence
- Central Europe
- biozonation
- phylozone
- BIOZONES
- EBRO BASIN CATALONIA
- gradualistic evolution
- OLIGOCENE
- central Europe
- PALEOGENE
- MIDDLE EOCENE
Projects
- 2 Finished
-
Continental Crises of the Jurassic: Major Extinction Events and Environmental Changes within the Lacustrine Ecosystems. Subproject Late Mesozoic lacustrine systems in Tunisia and their global correlation
Sames, B.
1/10/17 → 30/09/19
Project: Research funding
-
Integrating palaeoenvironmental and climate cyclicities – An optimized stratigraphic framework in the non-marine Lower Cretaceous
Sames, B.
3/12/14 → 3/12/17
Project: Research funding