Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia
The taxonomy, phylogeny and biostratigraphy of Eocene Turborotalia is reviewed. A total of nine species are recognized as distinct, namely Turborotalia altispiroides Bermudez, 1961, Turborotalia ampliapertura (Bolli, 1957), Turborotalia cerroazulensis (Cole, 1928), Turborotalia cocoaensis (Cushman,...
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Cushman Foundation for Foraminiferal Research
2006
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ftunivmilanoair:oai:air.unimi.it:2434/29366 2024-02-04T10:04:02+01:00 Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia P. N. Pearson V. Premec Fucek I. Premoli Silva P.N. Pearson V. Premec Fucek I. Premoli Silva 2006 http://hdl.handle.net/2434/29366 eng eng Cushman Foundation for Foraminiferal Research volume:41 firstpage:433 lastpage:460 journal:Special publication Cushman foundation for foraminiferal research http://hdl.handle.net/2434/29366 Planktonic foraminifera Eocene Turborotalia taxonomy Settore GEO/01 - Paleontologia e Paleoecologia info:eu-repo/semantics/article 2006 ftunivmilanoair 2024-01-09T23:20:26Z The taxonomy, phylogeny and biostratigraphy of Eocene Turborotalia is reviewed. A total of nine species are recognized as distinct, namely Turborotalia altispiroides Bermudez, 1961, Turborotalia ampliapertura (Bolli, 1957), Turborotalia cerroazulensis (Cole, 1928), Turborotalia cocoaensis (Cushman, 1928), Turborotalia cunialensis (Toumarkine and Bolli, 1970), Turborotalia frontosa (Subbotina, 1953), Turborotalia increbescens (Bandy, 1949), Turborotalia pomeroli (Toumarkine and Bolli, 1970), and Turborotalia possagnoensis (Toumarkine and Bolli, 1970). We support the view of Samuel and Salaj (1968) and Toumarkine and Bolli (1970) that Turborotalia frontosa, an enigmatic species that evolved in the early Eocene, was the first true member of the genus. Despite having a more globular morphology, T. frontosa shares several characters with other members of the genus, including its pustulose wall which has a strong tendency to defoliate, and high arched aperture. There is also a complete morphological intergradation between T. frontosa and later species of the genus. Studies of wall texture and ontogeny (Hemleben and Olsson Chapter 4, this volume) reveal the similarity of neanic T. frontosa with adult Globanomalina australiformis, a high latitude species that first evolved in the late Paleocene. We hypothesize that T. frontosa was descended from Globanomalina australiformis by the heterochronic process of hypermorphosis, and hence include Turborotalia in the Family Hedbergellidae. Article in Journal/Newspaper Planktonic foraminifera The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Planktonic foraminifera Eocene Turborotalia taxonomy Settore GEO/01 - Paleontologia e Paleoecologia |
spellingShingle |
Planktonic foraminifera Eocene Turborotalia taxonomy Settore GEO/01 - Paleontologia e Paleoecologia P. N. Pearson V. Premec Fucek I. Premoli Silva Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
topic_facet |
Planktonic foraminifera Eocene Turborotalia taxonomy Settore GEO/01 - Paleontologia e Paleoecologia |
description |
The taxonomy, phylogeny and biostratigraphy of Eocene Turborotalia is reviewed. A total of nine species are recognized as distinct, namely Turborotalia altispiroides Bermudez, 1961, Turborotalia ampliapertura (Bolli, 1957), Turborotalia cerroazulensis (Cole, 1928), Turborotalia cocoaensis (Cushman, 1928), Turborotalia cunialensis (Toumarkine and Bolli, 1970), Turborotalia frontosa (Subbotina, 1953), Turborotalia increbescens (Bandy, 1949), Turborotalia pomeroli (Toumarkine and Bolli, 1970), and Turborotalia possagnoensis (Toumarkine and Bolli, 1970). We support the view of Samuel and Salaj (1968) and Toumarkine and Bolli (1970) that Turborotalia frontosa, an enigmatic species that evolved in the early Eocene, was the first true member of the genus. Despite having a more globular morphology, T. frontosa shares several characters with other members of the genus, including its pustulose wall which has a strong tendency to defoliate, and high arched aperture. There is also a complete morphological intergradation between T. frontosa and later species of the genus. Studies of wall texture and ontogeny (Hemleben and Olsson Chapter 4, this volume) reveal the similarity of neanic T. frontosa with adult Globanomalina australiformis, a high latitude species that first evolved in the late Paleocene. We hypothesize that T. frontosa was descended from Globanomalina australiformis by the heterochronic process of hypermorphosis, and hence include Turborotalia in the Family Hedbergellidae. |
author2 |
P.N. Pearson V. Premec Fucek I. Premoli Silva |
format |
Article in Journal/Newspaper |
author |
P. N. Pearson V. Premec Fucek I. Premoli Silva |
author_facet |
P. N. Pearson V. Premec Fucek I. Premoli Silva |
author_sort |
P. N. Pearson |
title |
Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
title_short |
Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
title_full |
Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
title_fullStr |
Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
title_full_unstemmed |
Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia |
title_sort |
taxonomy, biostratigraphy, and phylogeny of eocene turborotalia |
publisher |
Cushman Foundation for Foraminiferal Research |
publishDate |
2006 |
url |
http://hdl.handle.net/2434/29366 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
volume:41 firstpage:433 lastpage:460 journal:Special publication Cushman foundation for foraminiferal research http://hdl.handle.net/2434/29366 |
_version_ |
1789971958462414848 |