Evolution and Diversification of Delphinid Skull Shapes
Summary: The diversity of the dolphin family was established during a short window of time. We investigated delphinid skull shape evolution, mapping shapes on an up-to-date nuclear phylogeny. In this model, the common ancestor was similar to Lagenorhynchus albirostris. Initial diversification occurr...
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doaj-62b1aeab92cf46308be34bc562292e8c2020-11-25T03:37:09ZengElsevieriScience2589-00422020-10-012310101543Evolution and Diversification of Delphinid Skull ShapesAnders Galatius0Rachel Racicot1Michael McGowen2Morten Tange Olsen3Marine Mammal Research, Department of Bioscience, Aarhus University, 4000 Roskilde, Denmark; Corresponding authorSektion Mammalogie, Senckenberg Forschungsinstitut und Naturkundemuseum (Research Institute and Natural History Museum), 60325 Frankfurt am Main, GermanyDepartment of Vertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC 20560, USAEvolutionary Genomics, Globe Institute, University of Copenhagen, 1353 Copenhagen K, DenmarkSummary: The diversity of the dolphin family was established during a short window of time. We investigated delphinid skull shape evolution, mapping shapes on an up-to-date nuclear phylogeny. In this model, the common ancestor was similar to Lagenorhynchus albirostris. Initial diversification occurred in three directions: toward specialized raptorial feeders of small prey with longer, narrower beaks, e.g., Delphinus; toward wider skulls with downward-oriented rostra and reduced temporal fossae, exemplified by suction feeders, e.g., Globicephala; and toward shorter and wider skulls/rostra and enlarged temporal fossae, e.g., Orcinus. Skull shape diversity was established early, the greatest later developments being adaptation of Steno to raptorial feeding on large prey and the convergence of Pseudorca toward Orcinus, related to handling large prey. Delphinid skull shapes are related to feeding mode and prey size, whereas adaptation to habitat is not marked. Over a short period, delphinid skulls have evolved a diversity eclipsing other extant odontocete clades.http://www.sciencedirect.com/science/article/pii/S2589004220307355Biological SciencesEvolutionary BiologyEvolutionary ProcessesPhylogenetics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Anders Galatius Rachel Racicot Michael McGowen Morten Tange Olsen |
spellingShingle |
Anders Galatius Rachel Racicot Michael McGowen Morten Tange Olsen Evolution and Diversification of Delphinid Skull Shapes iScience Biological Sciences Evolutionary Biology Evolutionary Processes Phylogenetics |
author_facet |
Anders Galatius Rachel Racicot Michael McGowen Morten Tange Olsen |
author_sort |
Anders Galatius |
title |
Evolution and Diversification of Delphinid Skull Shapes |
title_short |
Evolution and Diversification of Delphinid Skull Shapes |
title_full |
Evolution and Diversification of Delphinid Skull Shapes |
title_fullStr |
Evolution and Diversification of Delphinid Skull Shapes |
title_full_unstemmed |
Evolution and Diversification of Delphinid Skull Shapes |
title_sort |
evolution and diversification of delphinid skull shapes |
publisher |
Elsevier |
series |
iScience |
issn |
2589-0042 |
publishDate |
2020-10-01 |
description |
Summary: The diversity of the dolphin family was established during a short window of time. We investigated delphinid skull shape evolution, mapping shapes on an up-to-date nuclear phylogeny. In this model, the common ancestor was similar to Lagenorhynchus albirostris. Initial diversification occurred in three directions: toward specialized raptorial feeders of small prey with longer, narrower beaks, e.g., Delphinus; toward wider skulls with downward-oriented rostra and reduced temporal fossae, exemplified by suction feeders, e.g., Globicephala; and toward shorter and wider skulls/rostra and enlarged temporal fossae, e.g., Orcinus. Skull shape diversity was established early, the greatest later developments being adaptation of Steno to raptorial feeding on large prey and the convergence of Pseudorca toward Orcinus, related to handling large prey. Delphinid skull shapes are related to feeding mode and prey size, whereas adaptation to habitat is not marked. Over a short period, delphinid skulls have evolved a diversity eclipsing other extant odontocete clades. |
topic |
Biological Sciences Evolutionary Biology Evolutionary Processes Phylogenetics |
url |
http://www.sciencedirect.com/science/article/pii/S2589004220307355 |
work_keys_str_mv |
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