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Systematic utility of the phytosaur post-dentary mandibular region

2025-11Artigo científico Acesso aberto
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dc.contributor.authorLópez-Rojas, Víctor
dc.contributor.authorMoreno-Azanza, Miguel
dc.contributor.authorPuértolas-Pascual, Eduardo
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.pblJohn Wiley and Sons Inc.
dc.date.accessioned2026-01-28T11:31:01Z
dc.date.available2026-01-28T11:31:01Z
dc.date.issued2025-11
dc.descriptionPublisher Copyright: © 2025 The Author(s). Papers in Palaeontology published by John Wiley & Sons Ltd on behalf of The Palaeontological Association.
dc.description.abstractPhytosaurs, crocodile-like archosaurs from the Late Triassic, are known for their unique skull shape, whereas their mandibles are poorly studied. Two-dimensional (2D) geometric morphometric (GM) analysis is commonly used on dinosaurs and mammals. We applied this technique for the first time to the study of phytosaur mandibles to identify and quantify morphological differences outside the skull for use in phylogenetic analysis. The 2D GM analysis showed that the dorsal shape of the surangular had significant phylogenetic utility. This led to the reformulation of two characters (shape of the dorsal margin of the surangular, and shape of the retroarticular process) and the creation of four more new characters: shape of the ventral margin of the angular, dorsoventral height of the external mandibular fenestra, suture between the dentary and surangular, and the dorsal margin transition angle between the dentary and the surangular. Furthermore, three of these were identified as synapomorphies for the clade Leptosuchomorpha. To test the hypothesis that the mandible is taxonomically relevant, we ran a second analysis including two problematic, mandible specimens: NOVA-FCT-DCT 5396 (Silves Group, Portugal); and NMMNHS P-4256 (Bull Canyon Formation, New Mexico; which has been referred to Machaeroprosopus and Redondasaurus in previous studies). The analysis provided better resolution for these indeterminate specimens, suggesting that NOVA-FCT-DCT 5396 is Angistorhinus cf. talainti, and NMMNHS P-4256 is cf. Machaeroprosopus (Mystriosuchini).en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent23
dc.format.extent12347922
dc.identifier.doi10.1002/spp2.70045
dc.identifier.issn0031-0239
dc.identifier.otherPURE: 151374563
dc.identifier.otherPURE UUID: 16be66ed-4a85-4968-b941-9dadc30cd617
dc.identifier.otherScopus: 105020984098
dc.identifier.otherWOS: 001607847200001
dc.identifier.urihttp://hdl.handle.net/10362/199784
dc.identifier.urlhttps://www.scopus.com/pages/publications/105020984098
dc.identifier.urlhttps://www.webofscience.com/wos/woscc/full-record/WOS:001607847200001
dc.language.isoeng
dc.peerreviewedyes
dc.subjectGeometric morphometrics
dc.subjectPhylogeny
dc.subjectPhytosauria
dc.subjectPost-dentary
dc.subjectTriassic
dc.subjectPalaeontology
dc.titleSystematic utility of the phytosaur post-dentary mandibular regionen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue6
degois.publication.lastPage23
degois.publication.titlePapers in Palaeontology
degois.publication.volume11
dspace.entity.typePublication
rcaap.rightsopenAccess

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