Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited
ABSTRACT The dentition of lamniforme sharks exhibits several characters that have been used extensively to resolve the phylogenetic relationships of extant taxa, yet some uncertainties remain. Also, the development of different teeth of a tooth file within the jaws of most extant lamniforms has not...
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crwiley:10.1002/jmor.20597 2024-09-15T18:17:22+00:00 Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited Schnetz, Lisa Pfaff, Cathrin Kriwet, Jürgen 2016 http://dx.doi.org/10.1002/jmor.20597 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.20597 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.20597 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Morphology volume 277, issue 12, page 1584-1598 ISSN 0362-2525 1097-4687 journal-article 2016 crwiley https://doi.org/10.1002/jmor.20597 2024-09-05T05:09:34Z ABSTRACT The dentition of lamniforme sharks exhibits several characters that have been used extensively to resolve the phylogenetic relationships of extant taxa, yet some uncertainties remain. Also, the development of different teeth of a tooth file within the jaws of most extant lamniforms has not been documented to date. High‐resolution micro‐computed tomography is used here to re‐evaluate the importance of two dental characters within the order Lamniformes, which were considered not to be phylogenetically informative, the histotype and the number of teeth per tooth file. Additionally, the development and mineralization patterns of the teeth of the two osteodont lamniforms Lamna nasus and Alopias superciliosus were compared. We discuss the importance of these dental characters for phylogenetic interpretations to assess the quality of these characters in resolving lamniform relationships. The dental characters suggest that (1) Lamniformes are the only modern‐level sharks exhibiting the osteodont histotype, (2) the osteodont histotype in lamniform sharks is a derived state in modern‐level sharks (Elasmobranchii), (3) the osteodont type, conversely is convergently achieved when the clade Chondrichthyes is considered and thus might comprise a functional rather than a phylogenetic signal, and (4) there is an increase in the number of teeth per file throughout lamniform phylogeny. Structural development of the teeth of L. nasus and A. superciliosus is congruent with a previous investigation of the lamniform shark Carcharodon carcharias . J. Morphol. 277:1584–1598, 2016. © 2016 Wiley Periodicals, Inc. Article in Journal/Newspaper Lamna nasus Wiley Online Library Journal of Morphology 277 12 1584 1598 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT The dentition of lamniforme sharks exhibits several characters that have been used extensively to resolve the phylogenetic relationships of extant taxa, yet some uncertainties remain. Also, the development of different teeth of a tooth file within the jaws of most extant lamniforms has not been documented to date. High‐resolution micro‐computed tomography is used here to re‐evaluate the importance of two dental characters within the order Lamniformes, which were considered not to be phylogenetically informative, the histotype and the number of teeth per tooth file. Additionally, the development and mineralization patterns of the teeth of the two osteodont lamniforms Lamna nasus and Alopias superciliosus were compared. We discuss the importance of these dental characters for phylogenetic interpretations to assess the quality of these characters in resolving lamniform relationships. The dental characters suggest that (1) Lamniformes are the only modern‐level sharks exhibiting the osteodont histotype, (2) the osteodont histotype in lamniform sharks is a derived state in modern‐level sharks (Elasmobranchii), (3) the osteodont type, conversely is convergently achieved when the clade Chondrichthyes is considered and thus might comprise a functional rather than a phylogenetic signal, and (4) there is an increase in the number of teeth per file throughout lamniform phylogeny. Structural development of the teeth of L. nasus and A. superciliosus is congruent with a previous investigation of the lamniform shark Carcharodon carcharias . J. Morphol. 277:1584–1598, 2016. © 2016 Wiley Periodicals, Inc. |
format |
Article in Journal/Newspaper |
author |
Schnetz, Lisa Pfaff, Cathrin Kriwet, Jürgen |
spellingShingle |
Schnetz, Lisa Pfaff, Cathrin Kriwet, Jürgen Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
author_facet |
Schnetz, Lisa Pfaff, Cathrin Kriwet, Jürgen |
author_sort |
Schnetz, Lisa |
title |
Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
title_short |
Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
title_full |
Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
title_fullStr |
Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
title_full_unstemmed |
Tooth development and histology patterns in lamniform sharks (Elasmobranchii, Lamniformes) revisited |
title_sort |
tooth development and histology patterns in lamniform sharks (elasmobranchii, lamniformes) revisited |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/jmor.20597 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.20597 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.20597 |
genre |
Lamna nasus |
genre_facet |
Lamna nasus |
op_source |
Journal of Morphology volume 277, issue 12, page 1584-1598 ISSN 0362-2525 1097-4687 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jmor.20597 |
container_title |
Journal of Morphology |
container_volume |
277 |
container_issue |
12 |
container_start_page |
1584 |
op_container_end_page |
1598 |
_version_ |
1810455393181106176 |