Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia
The first extensive and stratigraphically detailed taxonomic study of the Middle to Late Eocene Bryozoa of the St Vincent Basin has identified more than 200 species of Cheilostomata and 50 species of Cyclostomata. There are three biogeographic groups: basin endemic, Australian aid global. Two-thirds...
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Online Access: | http://hdl.handle.net/2440/1858 https://doi.org/10.1080/00241160310006394 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/1858 2023-12-17T10:20:39+01:00 Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia Schmidt, R. Bone, Y. 2003 http://hdl.handle.net/2440/1858 https://doi.org/10.1080/00241160310006394 en eng Taylor & Francis As Lethaia, 2003; 36(4):345-356 0024-1164 1502-3931 http://hdl.handle.net/2440/1858 doi:10.1080/00241160310006394 http://dx.doi.org/10.1080/00241160310006394 Journal article 2003 ftunivadelaidedl https://doi.org/10.1080/00241160310006394 2023-11-20T23:20:08Z The first extensive and stratigraphically detailed taxonomic study of the Middle to Late Eocene Bryozoa of the St Vincent Basin has identified more than 200 species of Cheilostomata and 50 species of Cyclostomata. There are three biogeographic groups: basin endemic, Australian aid global. Two-thirds (116) of the cheilostome species and seven genera are currently considered endemic to this basin. Most species are endemic to Australia and similar to those found in the Oligo-Miocene of Victoria. The Cellariidae are a common component of most Australian Cainozoic deposits, but the species are highly dissimilar, with 13 of the 17 species here being new. The global component indicates that biogeographic links with regions outside Australia still existed in the Eocene. The cyclostome genus Reticrescis is only known from the Australian and Antarctic Eocene. Ten genera have their first occurrence in the Eocene St Vincent Basin. The Phidoloporidae and Smittinidae represent the most diverse and ubiquitous groups at a geological time close to their time of origination. Contemporaneous sediments in Antarctica, eastern Europe and North America also have a diverse fauna of this family, pointing to a strong Tethyan link. Rhamphosmittina lateralis (MacGillivray) is still extant in New Zealand, having an exceptionally long time range of 40 million years. Overall, the fauna has a distinct Late Cretaceous character. A new genus of Onychocellidae appears similar to genera that were common in Cretaceous Tethyan faunas but rare during the Cainozoic. This similarity ends in the Oligocene, after which the Australian bryozoan became endemic. Article in Journal/Newspaper Antarc* Antarctic Antarctica The University of Adelaide: Digital Library Antarctic New Zealand Lethaia 36 4 345 356 |
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Open Polar |
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The University of Adelaide: Digital Library |
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ftunivadelaidedl |
language |
English |
description |
The first extensive and stratigraphically detailed taxonomic study of the Middle to Late Eocene Bryozoa of the St Vincent Basin has identified more than 200 species of Cheilostomata and 50 species of Cyclostomata. There are three biogeographic groups: basin endemic, Australian aid global. Two-thirds (116) of the cheilostome species and seven genera are currently considered endemic to this basin. Most species are endemic to Australia and similar to those found in the Oligo-Miocene of Victoria. The Cellariidae are a common component of most Australian Cainozoic deposits, but the species are highly dissimilar, with 13 of the 17 species here being new. The global component indicates that biogeographic links with regions outside Australia still existed in the Eocene. The cyclostome genus Reticrescis is only known from the Australian and Antarctic Eocene. Ten genera have their first occurrence in the Eocene St Vincent Basin. The Phidoloporidae and Smittinidae represent the most diverse and ubiquitous groups at a geological time close to their time of origination. Contemporaneous sediments in Antarctica, eastern Europe and North America also have a diverse fauna of this family, pointing to a strong Tethyan link. Rhamphosmittina lateralis (MacGillivray) is still extant in New Zealand, having an exceptionally long time range of 40 million years. Overall, the fauna has a distinct Late Cretaceous character. A new genus of Onychocellidae appears similar to genera that were common in Cretaceous Tethyan faunas but rare during the Cainozoic. This similarity ends in the Oligocene, after which the Australian bryozoan became endemic. |
format |
Article in Journal/Newspaper |
author |
Schmidt, R. Bone, Y. |
spellingShingle |
Schmidt, R. Bone, Y. Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
author_facet |
Schmidt, R. Bone, Y. |
author_sort |
Schmidt, R. |
title |
Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
title_short |
Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
title_full |
Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
title_fullStr |
Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
title_full_unstemmed |
Biogeography of Eocene bryozoans from the St Vincent Basin, South Australia |
title_sort |
biogeography of eocene bryozoans from the st vincent basin, south australia |
publisher |
Taylor & Francis As |
publishDate |
2003 |
url |
http://hdl.handle.net/2440/1858 https://doi.org/10.1080/00241160310006394 |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://dx.doi.org/10.1080/00241160310006394 |
op_relation |
Lethaia, 2003; 36(4):345-356 0024-1164 1502-3931 http://hdl.handle.net/2440/1858 doi:10.1080/00241160310006394 |
op_doi |
https://doi.org/10.1080/00241160310006394 |
container_title |
Lethaia |
container_volume |
36 |
container_issue |
4 |
container_start_page |
345 |
op_container_end_page |
356 |
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1785524641628946432 |