A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California
Includes bibliographical references (leaves 82-95) California State University, Northridge. Department of Geological Sciences. Phylogenetic relationships among the fossil and living "whalebone" (baleen) whales remain poorly understood. Until recently, the extinct family Cetotheriidae, a fo...
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California State University, Northridge
2010
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Online Access: | http://hdl.handle.net/10211.3/143636 |
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Includes bibliographical references (leaves 82-95) California State University, Northridge. Department of Geological Sciences. Phylogenetic relationships among the fossil and living "whalebone" (baleen) whales remain poorly understood. Until recently, the extinct family Cetotheriidae, a former grade taxon of edentulous (toothless) whales of the suborder Mysticeti, was thought to be the evolutionary source of the modem-baleen whales, which include the families Balaenopteridae, Balaenidae, Neobalaenidae, and Eschrichtiidae. Following attempts to identify the most valid "cetotheres" to justifiably include in a strict family clade, the taxon is recognized as a derived group with uncertain relationships to modern taxa. The monophyly of the order Cetacea, suborder Mysticeti, and clade comprised of all edentulous baleen-bearing mysticetes is, nevertheless, assumed to be valid. Fossil baleen-bearing mysticetes commonly exhibit a mosaic of primitive and derived characters, hinting at transitional forms that link them to ancestors among more basal-toothed mysticetes. Furthermore, the toothed mysticetes show affinities with the archaeocetes, the third and most primitive suborder of the cetaceans. The evolutionary chronology of the mysticetes is not transparently linear, but branches stepwise, in radiative spurts. Relict groups commonly survived alongside groups with more derived characters. This thesis involved the preparation and description of a fossil cranium belonging to a new species of cetothere assigned to the genus Mixocetus. The specimen is of late Miocene age and is from the Monterey Formation at Orange County, southern California. The fossil whale is here placed in evolutionary context within the family Cetotheriidae sensu stricto (in the strict sense) and suborder Mysticeti. |
author2 |
Squires, Richard L. Geological Sciences Barnes, Lawrence G. Hertel, Fritz |
format |
Thesis |
author |
Ventimiglia, Matthew Phillip |
spellingShingle |
Ventimiglia, Matthew Phillip A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
author_facet |
Ventimiglia, Matthew Phillip |
author_sort |
Ventimiglia, Matthew Phillip |
title |
A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
title_short |
A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
title_full |
A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
title_fullStr |
A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
title_full_unstemmed |
A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California |
title_sort |
new miocene cetothere (mammalia: cetacea) from the monterey formation at laguna niguel, orange county, california |
publisher |
California State University, Northridge |
publishDate |
2010 |
url |
http://hdl.handle.net/10211.3/143636 |
genre |
baleen whales |
genre_facet |
baleen whales |
op_relation |
http://hdl.handle.net/10211.3/143636 |
op_rights |
http://scholarworks.csun.edu//handle/10211.2/286 By signing and submitting this license, you the author grant permission to UniversityName Graduate Studies to submit your thesis or dissertation, and any additional associated files you provide, to RepositoryName, the institutional repository of the UniversityName, on your behalf.You grant to RepositoryName the non-exclusive right to reproduce and/or distribute your submission worldwide in electronic or any medium for non-commercial, academic purposes. You agree that RepositoryName may, without changing the content, translate the submission to any medium or format, as well as keep more than one copy, for the purposes of security, backup and preservation. You represent that the submission is your original work, and that you have the right to grant the rights contained in this license. You also represent that your submission does not, to the best of your knowledge, infringe upon anyone's copyright. If the submission contains material for which you do not hold copyright, or for which the intended use is not permitted, or which does not reasonably fall under the guidelines of fair use, you represent that you have obtained the unrestricted permission of the copyright owner to grant RepositoryName the rights required by this license, and that such third-party owned material is clearly identified and acknowledged within the text or content of the submission. If the submission is based upon work that has been sponsored or supported by an agency or organization other than the UniversityName, you represent that you have fulfilled any right of review or other obligations required by such contract or agreement. RepositoryName will clearly identify your name(s) as the author(s) or owner(s) of the submission, and will not make any alterations, other than those allowed by this license, to your submission. |
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.3/143636 2023-05-15T15:37:07+02:00 A new Miocene cetothere (Mammalia: Cetacea) from the Monterey Formation at Laguna Niguel, Orange County, California Ventimiglia, Matthew Phillip Squires, Richard L. Geological Sciences Barnes, Lawrence G. Hertel, Fritz 2010 http://hdl.handle.net/10211.3/143636 en eng California State University, Northridge http://hdl.handle.net/10211.3/143636 http://scholarworks.csun.edu//handle/10211.2/286 By signing and submitting this license, you the author grant permission to UniversityName Graduate Studies to submit your thesis or dissertation, and any additional associated files you provide, to RepositoryName, the institutional repository of the UniversityName, on your behalf.You grant to RepositoryName the non-exclusive right to reproduce and/or distribute your submission worldwide in electronic or any medium for non-commercial, academic purposes. You agree that RepositoryName may, without changing the content, translate the submission to any medium or format, as well as keep more than one copy, for the purposes of security, backup and preservation. You represent that the submission is your original work, and that you have the right to grant the rights contained in this license. You also represent that your submission does not, to the best of your knowledge, infringe upon anyone's copyright. If the submission contains material for which you do not hold copyright, or for which the intended use is not permitted, or which does not reasonably fall under the guidelines of fair use, you represent that you have obtained the unrestricted permission of the copyright owner to grant RepositoryName the rights required by this license, and that such third-party owned material is clearly identified and acknowledged within the text or content of the submission. If the submission is based upon work that has been sponsored or supported by an agency or organization other than the UniversityName, you represent that you have fulfilled any right of review or other obligations required by such contract or agreement. RepositoryName will clearly identify your name(s) as the author(s) or owner(s) of the submission, and will not make any alterations, other than those allowed by this license, to your submission. Thesis 2010 ftcalifstateuniv 2022-04-13T11:19:02Z Includes bibliographical references (leaves 82-95) California State University, Northridge. Department of Geological Sciences. Phylogenetic relationships among the fossil and living "whalebone" (baleen) whales remain poorly understood. Until recently, the extinct family Cetotheriidae, a former grade taxon of edentulous (toothless) whales of the suborder Mysticeti, was thought to be the evolutionary source of the modem-baleen whales, which include the families Balaenopteridae, Balaenidae, Neobalaenidae, and Eschrichtiidae. Following attempts to identify the most valid "cetotheres" to justifiably include in a strict family clade, the taxon is recognized as a derived group with uncertain relationships to modern taxa. The monophyly of the order Cetacea, suborder Mysticeti, and clade comprised of all edentulous baleen-bearing mysticetes is, nevertheless, assumed to be valid. Fossil baleen-bearing mysticetes commonly exhibit a mosaic of primitive and derived characters, hinting at transitional forms that link them to ancestors among more basal-toothed mysticetes. Furthermore, the toothed mysticetes show affinities with the archaeocetes, the third and most primitive suborder of the cetaceans. The evolutionary chronology of the mysticetes is not transparently linear, but branches stepwise, in radiative spurts. Relict groups commonly survived alongside groups with more derived characters. This thesis involved the preparation and description of a fossil cranium belonging to a new species of cetothere assigned to the genus Mixocetus. The specimen is of late Miocene age and is from the Monterey Formation at Orange County, southern California. The fossil whale is here placed in evolutionary context within the family Cetotheriidae sensu stricto (in the strict sense) and suborder Mysticeti. Thesis baleen whales California State University (CSU): DSpace |