RPI measurements 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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The Royal Society
2017
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ftdatacite:10.6084/m9.figshare.5255098.v1 2023-05-15T18:33:32+02:00 RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) Boessenecker, Robert W. Fraser, Danielle Churchill, Morgan Geisler, Jonathan H. 2017 https://dx.doi.org/10.6084/m9.figshare.5255098.v1 https://rs.figshare.com/articles/dataset/RPI_measurements_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255098/1 unknown The Royal Society https://dx.doi.org/10.1098/rspb.2017.0531 https://dx.doi.org/10.6084/m9.figshare.5255098 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy dataset Dataset 2017 ftdatacite https://doi.org/10.6084/m9.figshare.5255098.v1 https://doi.org/10.1098/rspb.2017.0531 https://doi.org/10.6084/m9.figshare.5255098 2021-11-05T12:55:41Z 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. Dataset toothed whales DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy |
spellingShingle |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy Boessenecker, Robert W. Fraser, Danielle Churchill, Morgan Geisler, Jonathan H. RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
topic_facet |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy |
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 |
Dataset |
author |
Boessenecker, Robert W. Fraser, Danielle Churchill, Morgan Geisler, Jonathan H. |
author_facet |
Boessenecker, Robert W. Fraser, Danielle Churchill, Morgan Geisler, Jonathan H. |
author_sort |
Boessenecker, Robert W. |
title |
RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_short |
RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_full |
RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_fullStr |
RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_full_unstemmed |
RPI measurements from A toothless dwarf dolphin (Odontoceti: Xenorophidae) points to explosive feeding diversification of modern whales (Neoceti) |
title_sort |
rpi measurements from a toothless dwarf dolphin (odontoceti: xenorophidae) points to explosive feeding diversification of modern whales (neoceti) |
publisher |
The Royal Society |
publishDate |
2017 |
url |
https://dx.doi.org/10.6084/m9.figshare.5255098.v1 https://rs.figshare.com/articles/dataset/RPI_measurements_from_A_toothless_dwarf_dolphin_Odontoceti_Xenorophidae_points_to_explosive_feeding_diversification_of_modern_whales_Neoceti_/5255098/1 |
genre |
toothed whales |
genre_facet |
toothed whales |
op_relation |
https://dx.doi.org/10.1098/rspb.2017.0531 https://dx.doi.org/10.6084/m9.figshare.5255098 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.5255098.v1 https://doi.org/10.1098/rspb.2017.0531 https://doi.org/10.6084/m9.figshare.5255098 |
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1766218146203566080 |