Inner ear sensory system changes as extinct crocodylomorphs transitioned from land to water

  1. Schwab, Julia ORCID logo
  2. Young, Mark T.
  3. Neenan, James ORCID logo
  4. Walsh, Stig A.
  5. Witmer, Lawrence ORCID logo
  6. Herrera, Yanina ORCID logo
  7. Allain, Ronan
  8. Brochu, Christopher A.
  9. Choiniere, Jonah N.
  10. Clark, James M.
  11. Dollman, Kathleen N.
  12. Etches, Steve
  13. Fritsch, Guido
  14. Gignac, Paul ORCID logo
  15. Ruebenstahl, Alexander
  16. Sachs, Sven
  17. Turner, Alan H.
  18. Vignaud, Patrick
  19. Wilberg, Eric ORCID logo
  20. Xu, Xing
  21. Zanno, Lindsay E.
  22. Brusatte, Stephen ORCID logo

WeightNameValue
1000 Titel
  • Inner ear sensory system changes as extinct crocodylomorphs transitioned from land to water
1000 Autor/in
  1. Schwab, Julia |
  2. Young, Mark T. |
  3. Neenan, James |
  4. Walsh, Stig A. |
  5. Witmer, Lawrence |
  6. Herrera, Yanina |
  7. Allain, Ronan |
  8. Brochu, Christopher A. |
  9. Choiniere, Jonah N. |
  10. Clark, James M. |
  11. Dollman, Kathleen N. |
  12. Etches, Steve |
  13. Fritsch, Guido |
  14. Gignac, Paul |
  15. Ruebenstahl, Alexander |
  16. Sachs, Sven |
  17. Turner, Alan H. |
  18. Vignaud, Patrick |
  19. Wilberg, Eric |
  20. Xu, Xing |
  21. Zanno, Lindsay E. |
  22. Brusatte, Stephen |
1000 Erscheinungsjahr 2020
1000 LeibnizOpen
1000 Publikationstyp
  1. Artikel |
1000 Online veröffentlicht
  • 2020-05-12
1000 Erschienen in
1000 Quellenangabe
  • 117(19):10422-10428
1000 FRL-Sammlung
1000 Verlagsversion
  • https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7229756/ |
  • https://doi.org/10.1073/pnas.2002146117 |
1000 Ergänzendes Material
  • https://www.pnas.org/content/117/19/10422/tab-figures-data |
1000 Publikationsstatus
1000 Begutachtungsstatus
1000 Sprache der Publikation
1000 Abstract/Summary
  • During major evolutionary transitions, groups acquire a new body plan that allows them to colonize new habitats and behave in new ways. The evolution of swimming cetaceans from land-living mammals is a prime example. We document changes to the inner ear sensory system, involved in balance and equilibrium, as extinct crocodile relatives called thalattosuchians underwent a similar transition in the Mesozoic (ca. 182–125 mya). We find that open-ocean thalattosuchians developed strikingly compact and thickened bony labyrinth after a long semiaquatic phase and after modifying their skeleton to become better swimmers. This differs from cetaceans, which miniaturized their bony labyrinths soon after entering the water. Therefore, thalattosuchians and cetaceans took different evolutionary paths from land to water.Major evolutionary transitions, in which animals develop new body plans and adapt to dramatically new habitats and lifestyles, have punctuated the history of life. The origin of cetaceans from land-living mammals is among the most famous of these events. Much earlier, during the Mesozoic Era, many reptile groups also moved from land to water, but these transitions are more poorly understood. We use computed tomography to study changes in the inner ear vestibular system, involved in sensing balance and equilibrium, as one of these groups, extinct crocodile relatives called thalattosuchians, transitioned from terrestrial ancestors into pelagic (open ocean) swimmers. We find that the morphology of the vestibular system corresponds to habitat, with pelagic thalattosuchians exhibiting a more compact labyrinth with wider semicircular canal diameters and an enlarged vestibule, reminiscent of modified and miniaturized labyrinths of other marine reptiles and cetaceans. Pelagic thalattosuchians with modified inner ears were the culmination of an evolutionary trend with a long semiaquatic phase, and their pelagic vestibular systems appeared after the first changes to the postcranial skeleton that enhanced their ability to swim. This is strikingly different from cetaceans, which miniaturized their labyrinths soon after entering the water, without a prolonged semiaquatic stage. Thus, thalattosuchians and cetaceans became secondarily aquatic in different ways and at different paces, showing that there are different routes for the same type of transition.
1000 Sacherschließung
lokal morphology
lokal bony labyrinth
lokal thalattosuchia
lokal vestibular system
lokal CT scanning
1000 Fächerklassifikation (DDC)
1000 Liste der Beteiligten
  1. https://orcid.org/0000-0002-6229-7116|https://frl.publisso.de/adhoc/uri/WW91bmcsIE1hcmsgVC4=|https://orcid.org/0000-0002-8215-5748|https://frl.publisso.de/adhoc/uri/V2Fsc2gsIFN0aWcgQS4=|https://orcid.org/0000-0002-7610-0118|https://orcid.org/0000-0002-2020-1227|https://frl.publisso.de/adhoc/uri/QWxsYWluLCBSb25hbg==|https://frl.publisso.de/adhoc/uri/QnJvY2h1LCBDaHJpc3RvcGhlciBBLg==|https://frl.publisso.de/adhoc/uri/Q2hvaW5pZXJlLCBKb25haCBOLg==|https://frl.publisso.de/adhoc/uri/Q2xhcmssIEphbWVzIE0u|https://frl.publisso.de/adhoc/uri/RG9sbG1hbiwgS2F0aGxlZW4gTi4=|https://frl.publisso.de/adhoc/uri/RXRjaGVzLCBTdGV2ZQ==|https://frl.publisso.de/adhoc/uri/RnJpdHNjaCwgR3VpZG8=|https://orcid.org/0000-0001-9181-3258|https://frl.publisso.de/adhoc/uri/UnVlYmVuc3RhaGwsIEFsZXhhbmRlcg==|https://frl.publisso.de/adhoc/uri/U2FjaHMsIFN2ZW4=|https://frl.publisso.de/adhoc/uri/VHVybmVyLCBBbGFuIEgu|https://frl.publisso.de/adhoc/uri/VmlnbmF1ZCwgUGF0cmljaw==|https://orcid.org/0000-0002-7038-0825|https://frl.publisso.de/adhoc/uri/WHUsIFhpbmc=|https://frl.publisso.de/adhoc/uri/WmFubm8sIExpbmRzYXkgRS4=|https://orcid.org/0000-0001-7525-7319
1000 Label
1000 Förderer
  1. Leverhulme Trust |
  2. Carl Gans Fund |
  3. American Friends of the Alexander von Humboldt Foundation |
  4. Agencia Nacional de Promoción Científica y Tecnológica |
  5. National Science Foundation |
  6. National Natural Science Foundation of China |
1000 Fördernummer
  1. RPG-2017-167; ECF-2017-360
  2. -
  3. -
  4. PICTs 2016-0267; PICTs 2016-1039
  5. DEB 1754659; DEB 1754596
  6. 41688103
1000 Förderprogramm
  1. -
  2. -
  3. -
  4. -
  5. -
  6. -
1000 Förderung
  1. 1000 joinedFunding-child
    1000 Förderer Leverhulme Trust |
    1000 Förderprogramm -
    1000 Fördernummer RPG-2017-167; ECF-2017-360
  2. 1000 joinedFunding-child
    1000 Förderer Carl Gans Fund |
    1000 Förderprogramm -
    1000 Fördernummer -
  3. 1000 joinedFunding-child
    1000 Förderer American Friends of the Alexander von Humboldt Foundation |
    1000 Förderprogramm -
    1000 Fördernummer -
  4. 1000 joinedFunding-child
    1000 Förderer Agencia Nacional de Promoción Científica y Tecnológica |
    1000 Förderprogramm -
    1000 Fördernummer PICTs 2016-0267; PICTs 2016-1039
  5. 1000 joinedFunding-child
    1000 Förderer National Science Foundation |
    1000 Förderprogramm -
    1000 Fördernummer DEB 1754659; DEB 1754596
  6. 1000 joinedFunding-child
    1000 Förderer National Natural Science Foundation of China |
    1000 Förderprogramm -
    1000 Fördernummer 41688103
1000 Objektart article
1000 Beschrieben durch
1000 @id frl:6426912.rdf
1000 Erstellt am 2021-04-19T10:39:06.066+0200
1000 Erstellt von 122
1000 beschreibt frl:6426912
1000 Bearbeitet von 122
1000 Zuletzt bearbeitet 2021-04-19T10:39:44.204+0200
1000 Objekt bearb. Mon Apr 19 10:39:43 CEST 2021
1000 Vgl. frl:6426912
1000 Oai Id
  1. oai:frl.publisso.de:frl:6426912 |
1000 Sichtbarkeit Metadaten public
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