Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys)
Bolboforma is a microfossil of uncertain origin with affinities to protophytic algae. It generally occurs at high latitudes and/or in cool and temperate waters and has a high stratigraphic potential especially for the Miocene. Calcareous cysts of dinoflagellates represent the ‘benthic cyst stage’ of...
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ftcopernicus:oai:publications.copernicus.org:jm65515 2023-05-15T18:01:02+02:00 Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) Spezzaferri, Silvia Rögl, Fred 2018-09-27 application/pdf https://doi.org/10.1144/jm.23.2.139 https://jm.copernicus.org/articles/23/139/2004/ eng eng doi:10.1144/jm.23.2.139 https://jm.copernicus.org/articles/23/139/2004/ eISSN: 2041-4978 Text 2018 ftcopernicus https://doi.org/10.1144/jm.23.2.139 2020-07-20T16:27:33Z Bolboforma is a microfossil of uncertain origin with affinities to protophytic algae. It generally occurs at high latitudes and/or in cool and temperate waters and has a high stratigraphic potential especially for the Miocene. Calcareous cysts of dinoflagellates represent the ‘benthic cyst stage’ of unicellular organisms belonging to the marine phytoplankton. The occurrence of Bolboforma, Bachmayerella is documented here and, for the first time, some calcareous cysts of dinoflagellates tentatively attributed to Alasphaera and Pithonella from Badenian (Langhian–Middle Miocene) sediments in Austrian and Moravian localities. Alasphaera and Pithonella were previously described from Cretaceous and Danian sediments only, therefore, their range has been extended into the Paratethyan Middle Miocene. Correlation of Bolboforma bioevents with standard geological time-scales allows confirmation, and in some cases refinement, of age assignments based on other microfossil groups, such as foraminifera and calcareous nannofossils, in Paratethyan areas. In particular, this paper presents a case study of the biostratigraphy of the Grund Formation outcropping at its type locality in Lower Austria. Age attribution of the Grund Formation has been uncertain for some time. The recovery of Praeorbulina glomerosa circularis and Uvigerina macrocarinata , associated with Bolboforma reticulata , allows the correlation of the Grund Formation with the Early Badenian (Middle Miocene). As planktonic foraminifera are generally very rare or absent in shelf deposits of many other Austrian and Moravian Middle Miocene sedimentary sequences, Bolboforma , and in particular B. reticulata , remains an important biomarker to identify lower Badenian sediments. Additionally, the new species Bolboforma gneixendorfensis Spezzaferri & Rögl is described. It is generally double-chambered with a weakly reticulate wall texture and is associated with Bolboforma reticulata , B. bireticulata and/or B. moravica . Text Planktonic foraminifera Copernicus Publications: E-Journals Journal of Micropalaeontology 23 2 139 152 |
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Copernicus Publications: E-Journals |
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English |
description |
Bolboforma is a microfossil of uncertain origin with affinities to protophytic algae. It generally occurs at high latitudes and/or in cool and temperate waters and has a high stratigraphic potential especially for the Miocene. Calcareous cysts of dinoflagellates represent the ‘benthic cyst stage’ of unicellular organisms belonging to the marine phytoplankton. The occurrence of Bolboforma, Bachmayerella is documented here and, for the first time, some calcareous cysts of dinoflagellates tentatively attributed to Alasphaera and Pithonella from Badenian (Langhian–Middle Miocene) sediments in Austrian and Moravian localities. Alasphaera and Pithonella were previously described from Cretaceous and Danian sediments only, therefore, their range has been extended into the Paratethyan Middle Miocene. Correlation of Bolboforma bioevents with standard geological time-scales allows confirmation, and in some cases refinement, of age assignments based on other microfossil groups, such as foraminifera and calcareous nannofossils, in Paratethyan areas. In particular, this paper presents a case study of the biostratigraphy of the Grund Formation outcropping at its type locality in Lower Austria. Age attribution of the Grund Formation has been uncertain for some time. The recovery of Praeorbulina glomerosa circularis and Uvigerina macrocarinata , associated with Bolboforma reticulata , allows the correlation of the Grund Formation with the Early Badenian (Middle Miocene). As planktonic foraminifera are generally very rare or absent in shelf deposits of many other Austrian and Moravian Middle Miocene sedimentary sequences, Bolboforma , and in particular B. reticulata , remains an important biomarker to identify lower Badenian sediments. Additionally, the new species Bolboforma gneixendorfensis Spezzaferri & Rögl is described. It is generally double-chambered with a weakly reticulate wall texture and is associated with Bolboforma reticulata , B. bireticulata and/or B. moravica . |
format |
Text |
author |
Spezzaferri, Silvia Rögl, Fred |
spellingShingle |
Spezzaferri, Silvia Rögl, Fred Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
author_facet |
Spezzaferri, Silvia Rögl, Fred |
author_sort |
Spezzaferri, Silvia |
title |
Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
title_short |
Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
title_full |
Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
title_fullStr |
Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
title_full_unstemmed |
Bolboforma (Phytoplankton Incertae Sedis), Bachmayerella and other Calciodinelloidea (Phytoplankton) from the Middle Miocene of the Alpine–Carpathian Foredeep (Central Paratethys) |
title_sort |
bolboforma (phytoplankton incertae sedis), bachmayerella and other calciodinelloidea (phytoplankton) from the middle miocene of the alpine–carpathian foredeep (central paratethys) |
publishDate |
2018 |
url |
https://doi.org/10.1144/jm.23.2.139 https://jm.copernicus.org/articles/23/139/2004/ |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
eISSN: 2041-4978 |
op_relation |
doi:10.1144/jm.23.2.139 https://jm.copernicus.org/articles/23/139/2004/ |
op_doi |
https://doi.org/10.1144/jm.23.2.139 |
container_title |
Journal of Micropalaeontology |
container_volume |
23 |
container_issue |
2 |
container_start_page |
139 |
op_container_end_page |
152 |
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1766170345042083840 |