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dc.contributor.author
Young, Mark T.
dc.contributor.author
Bowman, Charlotte I. W.
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Erb, Arthur
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Schwab, Julia A.
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Witmer, Lawrence
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Herrera, Laura Yanina
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Brusatte, Stephen L.
dc.date.available
2024-03-18T11:38:36Z
dc.date.issued
2023-05
dc.identifier.citation
Young, Mark T.; Bowman, Charlotte I. W.; Erb, Arthur; Schwab, Julia A.; Witmer, Lawrence; et al.; Evidence for a novel cranial thermoregulatory pathway in thalattosuchian crocodylomorphs; PeerJ Inc; PeerJ; 11; 5-2023; 1-26
dc.identifier.uri
http://hdl.handle.net/11336/230764
dc.description.abstract
Thalattosuchian crocodylomorphs were a diverse clade that lived from the Early Jurassic to the Early Cretaceous. The subclade Metriorhynchoidea underwent a remarkable transition, evolving from semi-aquatic ambush predators into fully aquatic forms living in the open oceans. Thalattosuchians share a peculiar palatal morphology with semi-aquatic and aquatic fossil cetaceans: paired anteroposteriorly aligned grooves along the palatal surface of the bony secondary palate. In extant cetaceans, these grooves are continuous with the greater palatine artery foramina, arteries that supply their oral thermoregulatory structures. Herein, we investigate the origins of thalattosuchian palatal grooves by examining CT scans of six thalattosuchian species (one teleosauroid, two early-diverging metriorhynchoids and three metriorhynchids), and CT scans of eleven extant crocodylian species. All thalattosuchians had paired osseous canals, enclosed by the palatines, that connect the nasal cavity to the oral cavity. These osseous canals open into the oral cavity via foramina at the posterior terminus of the palatal grooves. Extant crocodylians lack both the external grooves and the internal canals. We posit that in thalattosuchians these novel palatal canals transmitted hypertrophied medial nasal vessels (artery and vein), creating a novel heat exchange pathway connecting the palatal vascular plexus to the endocranial region. Given the general hypertrophy of thalattosuchian cephalic vasculature, and their increased blood flow and volume, thalattosuchians would have required a more extensive suite of thermoregulatory pathways to maintain stable temperatures for their neurosensory tissues.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
PeerJ Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
CROCODYLOMORPHA
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METRIORHYNCHIDAE
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THALATTOSUCHIA
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THERMOREGULATION
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VASCULATURE
dc.subject.classification
Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Evidence for a novel cranial thermoregulatory pathway in thalattosuchian crocodylomorphs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-03-13T13:43:21Z
dc.identifier.eissn
2167-8359
dc.journal.volume
11
dc.journal.pagination
1-26
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Corte Madera
dc.description.fil
Fil: Young, Mark T.. LWL-Museum für Naturkunde; Alemania. University of Edinburgh; Reino Unido
dc.description.fil
Fil: Bowman, Charlotte I. W.. University of Edinburgh; Reino Unido
dc.description.fil
Fil: Erb, Arthur. University of Edinburgh; Reino Unido
dc.description.fil
Fil: Schwab, Julia A.. University of Edinburgh; Reino Unido. University of Manchester; Reino Unido
dc.description.fil
Fil: Witmer, Lawrence. Ohio University; Estados Unidos
dc.description.fil
Fil: Herrera, Laura Yanina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Brusatte, Stephen L.. University of Edinburgh; Reino Unido
dc.journal.title
PeerJ
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://peerj.com/articles/15353/
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.7717/peerj.15353
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