Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti)
Toothed whales (Odontoceti) are adapted for catching prey underwater and possess some of the most derived feeding specializations of all mammals, including the loss of milk teeth (monophyodonty), high tooth count (polydonty), and the loss of discrete tooth classes (homodonty). Many extant odontocete...
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ftroysocietyfig:oai:figshare.com:article/5255137 2023-05-15T18:33:32+02:00 Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) Robert W. Boessenecker Danielle Fraser Morgan Churchill Jonathan H. Geisler 2017-07-28T09:58:44Z https://doi.org/10.6084/m9.figshare.5255137.v1 https://figshare.com/articles/journal_contribution/Supplementary_description_and_cladograms_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255137 unknown doi:10.6084/m9.figshare.5255137.v1 https://figshare.com/articles/journal_contribution/Supplementary_description_and_cladograms_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255137 CC BY CC-BY Evolutionary Biology Palaeontology (incl. Palynology) Animal Systematics and Taxonomy Plant Systematics and Taxonomy Xenorophidae Odontoceti Neoceti suction feeding Oligocene Text Journal contribution 2017 ftroysocietyfig https://doi.org/10.6084/m9.figshare.5255137.v1 2022-01-01T19:53:46Z Toothed whales (Odontoceti) are adapted for catching prey underwater and possess some of the most derived feeding specializations of all mammals, including the loss of milk teeth (monophyodonty), high tooth count (polydonty), and the loss of discrete tooth classes (homodonty). Many extant odontocetes possess some combination of short, broad rostra, reduced tooth counts, fleshy lips, and enlarged hyoid bones—all adaptations for suction feeding upon fish and squid. We report a new fossil odontocete from the Oligocene (approx. 30 Ma) of South Carolina ( Inermorostrum xenops , gen. et sp. nov.) that possesses adaptations for suction feeding: toothlessness and a shortened rostrum (brevirostry). Enlarged foramina on the rostrum suggest the presence of enlarged lips or perhaps vibrissae. Phylogenetic analysis firmly places Inermorostrum within the Xenorophidae, an early diverging odontocete clade typified by long-snouted, heterodont dolphins. Inermorostrum is the earliest obligate suction feeder within the Odontoceti, a feeding mode that independently evolved several times within the clade. Analysis of macroevolutionary trends in rostral shape indicate stabilizing selection around an optimum rostral shape over the course of odontocete evolution, and a post-Eocene explosion in feeding morphology, heralding the diversity of feeding behaviour among modern Odontoceti. Other Non-Article Part of Journal/Newspaper toothed whales The Royal Society: Figshare |
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Open Polar |
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The Royal Society: Figshare |
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ftroysocietyfig |
language |
unknown |
topic |
Evolutionary Biology Palaeontology (incl. Palynology) Animal Systematics and Taxonomy Plant Systematics and Taxonomy Xenorophidae Odontoceti Neoceti suction feeding Oligocene |
spellingShingle |
Evolutionary Biology Palaeontology (incl. Palynology) Animal Systematics and Taxonomy Plant Systematics and Taxonomy Xenorophidae Odontoceti Neoceti suction feeding Oligocene Robert W. Boessenecker Danielle Fraser Morgan Churchill Jonathan H. Geisler Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
topic_facet |
Evolutionary Biology Palaeontology (incl. Palynology) Animal Systematics and Taxonomy Plant Systematics and Taxonomy Xenorophidae Odontoceti Neoceti suction feeding Oligocene |
description |
Toothed whales (Odontoceti) are adapted for catching prey underwater and possess some of the most derived feeding specializations of all mammals, including the loss of milk teeth (monophyodonty), high tooth count (polydonty), and the loss of discrete tooth classes (homodonty). Many extant odontocetes possess some combination of short, broad rostra, reduced tooth counts, fleshy lips, and enlarged hyoid bones—all adaptations for suction feeding upon fish and squid. We report a new fossil odontocete from the Oligocene (approx. 30 Ma) of South Carolina ( Inermorostrum xenops , gen. et sp. nov.) that possesses adaptations for suction feeding: toothlessness and a shortened rostrum (brevirostry). Enlarged foramina on the rostrum suggest the presence of enlarged lips or perhaps vibrissae. Phylogenetic analysis firmly places Inermorostrum within the Xenorophidae, an early diverging odontocete clade typified by long-snouted, heterodont dolphins. Inermorostrum is the earliest obligate suction feeder within the Odontoceti, a feeding mode that independently evolved several times within the clade. Analysis of macroevolutionary trends in rostral shape indicate stabilizing selection around an optimum rostral shape over the course of odontocete evolution, and a post-Eocene explosion in feeding morphology, heralding the diversity of feeding behaviour among modern Odontoceti. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Robert W. Boessenecker Danielle Fraser Morgan Churchill Jonathan H. Geisler |
author_facet |
Robert W. Boessenecker Danielle Fraser Morgan Churchill Jonathan H. Geisler |
author_sort |
Robert W. Boessenecker |
title |
Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_short |
Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_full |
Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_fullStr |
Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_full_unstemmed |
Supplementary description and cladograms from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_sort |
supplementary description and cladograms from a toothless dwarf dolphin (odontoceti: xenorophidae) points to explosive feeding diversification of modern whales (neoceti) |
publishDate |
2017 |
url |
https://doi.org/10.6084/m9.figshare.5255137.v1 https://figshare.com/articles/journal_contribution/Supplementary_description_and_cladograms_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255137 |
genre |
toothed whales |
genre_facet |
toothed whales |
op_relation |
doi:10.6084/m9.figshare.5255137.v1 https://figshare.com/articles/journal_contribution/Supplementary_description_and_cladograms_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255137 |
op_rights |
CC BY |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.5255137.v1 |
_version_ |
1766218148428644352 |