Osteohistological characterization of notosuchian osteoderms: Evidence for an overlying thick leathery layer of skin

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dc.contributor.authorSena, Mariana Valéria de Araújo
dc.contributor.authorMarinho, Thiago da Silva
dc.contributor.authorMontefeltro, Felipe Chinaglia [UNESP]
dc.contributor.authorLanger, Max Cardoso
dc.contributor.authorFachini, Thiago Schineider
dc.contributor.authorNava, William Roberto
dc.contributor.authorPinheiro, André Eduardo Piacentini
dc.contributor.authorde Araújo, Esaú Victor
dc.contributor.authorAubier, Paul
dc.contributor.authorde Andrade, Rafael César Lima Pedroso
dc.contributor.authorSayão, Juliana Manso
dc.contributor.authorde Oliveira, Gustavo Ribeiro
dc.contributor.authorCubo, Jorge
dc.contributor.institutionSorbonne Université
dc.contributor.institutionRua Carolino Sucupira—Pimenta
dc.contributor.institutionUniversidade Federal do Triângulo Mineiro
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionPrefeitura Municipal de Marília
dc.contributor.institutionUniversidade do Estado do Rio de Janeiro (UERJ)
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionUniversidade Federal Rural de Pernambuco
dc.date.accessioned2023-07-29T13:33:09Z
dc.date.available2023-07-29T13:33:09Z
dc.date.issued2023-01-01
dc.description.abstractOsteoderms are mineralized structures embedded in the dermis, known for nonavian archosaurs, squamates, xenarthrans, and amphibians. Herein, we compared the osteoderm histology of Brazilian Notosuchia of Cretaceous age using three neosuchians for comparative purposes. Microanatomical analyses showed that most of them present a diploe structure similar to those of other pseudosuchians, lizards, and turtles. This structure contains two cortices (the external cortex composed of an outer and an inner layers, and the basal cortex) and a core in-between them. Notosuchian osteoderms show high bone compactness (>0.85) with varying degrees of cancellous bone in the core. The neosuchian Guarinisuchus shows the lowest bone compactness with a well-developed cancellous layer. From an ontogenetic perspective, most tissues are formed through periosteal ossification, although the mineralized tissues observed in baurusuchid LPRP/USP 0634 suggest a late metaplastic development. Histology suggests that the ossification center of notosuchian osteoderm is located at the keel. Interestingly, we identified Sharpey's fibers running perpendicularly to the outer layer of the external cortex in Armadillosuchus arrudai, Itasuchus jesuinoi, and Baurusuchidae (LPRP/USP 0642). This feature indicates a tight attachment within the dermis, and it is evidence for the presence of an overlying thick leathery layer of skin over these osteoderms. These data allow a better understanding of the osteohistological structure of crocodylomorph dermal bones, and highlight their structural diversity. We suggest that the vascular canals present in some sampled osteoderms connecting the inner layer of the external cortex and the core with the external surface may increase osteoderm surface and the capacity of heat transfer in terrestrial notosuchians.en
dc.description.affiliationCentre de Recherche en Paléontologie Paris (CR2P UMR 7207) Muséum national d'Histoire naturelle CNRS Sorbonne Université
dc.description.affiliationCentro de Ciências Biológicas e da Saúde Laboratório de Paleontologia da URCA Universidade Regional do Cariri Rua Carolino Sucupira—Pimenta, Ceará
dc.description.affiliationCentro de Pesquisas Paleontológicas “Llewellyn Ivor Price” Complexo Cultural e Científico Peirópolis Pró-Reitoria de Extensão Universitária Universidade Federal do Triângulo Mineiro, Minas Gerais
dc.description.affiliationInstituto de Ciências Exatas Naturais e Educação Universidade Federal do Triângulo Mineiro, Minas Gerais
dc.description.affiliationDepartamento de Biologia e Zootecnia Faculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista, São Paulo
dc.description.affiliationFaculdade de Filosofia Ciências e Letras de Ribeirão Preto Laboratório de Paleontologia de Ribeirão Preto Universidade de São Paulo, São Paulo
dc.description.affiliationMuseu de Paleontologia de Marília Prefeitura Municipal de Marília, São Paulo
dc.description.affiliationFaculdade de Formação de es Universidade do Estado do Rio de Janeiro
dc.description.affiliationMuseu Nacional do Rio de Janeiro Universidade Federal do Rio de Janeiro
dc.description.affiliationLaboratório de Paleontologia e Sistemática (LAPASI) Departamento de Biologia Universidade Federal Rural de Pernambuco, Pernambuco
dc.description.affiliationUnespDepartamento de Biologia e Zootecnia Faculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista, São Paulo
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCentre National de la Recherche Scientifique
dc.description.sponsorshipFundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipUniversité Sorbonne Paris Cité
dc.identifierhttp://dx.doi.org/10.1002/jmor.21536
dc.identifier.citationJournal of Morphology, v. 284, n. 1, 2023.
dc.identifier.doi10.1002/jmor.21536
dc.identifier.issn1097-4687
dc.identifier.issn0362-2525
dc.identifier.scopus2-s2.0-85144249584
dc.identifier.urihttp://hdl.handle.net/11449/248052
dc.language.isoeng
dc.relation.ispartofJournal of Morphology
dc.sourceScopus
dc.subjectossification
dc.subjectosteoderm
dc.subjectosteohistology
dc.subjectPseudosuchia
dc.titleOsteohistological characterization of notosuchian osteoderms: Evidence for an overlying thick leathery layer of skinen
dc.typeArtigo
unesp.author.orcid0000-0003-4708-999X[1]
unesp.departmentBiologia e Zootecnia - FEISpt

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Ilha Solteira - FEIS - Faculdade de Engenharia