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Here, we describe a new species of a longirostrine Peirosauridae from the Adamantina Formation (Bauru Basin, Late Cretaceous). The specimen consists of a partially preserved skull with a cranial roof, interorbital region, and fragments of the posterior portion of the rostrum, including the prefrontal and lacrimal; left hemimandible, with 14 alveoli and 12 teeth; and a single cervical rib fragment. The specimen is associated with Peirosauridae by three cranial synapomorphies, and it can be assigned to a new genus and species by presenting seven cranial and one tooth apomorphies. To clarify the position of the new taxon, an updated phylogenetic analysis was performed with increased sampling of taxa of Notosuchia, especially Peirosauridae, and phylogenetically relevant characters. Our results indicated the monophyly of Peirosauridae, formed by two main lineages, the oreinirostral and presumably terrestrial Peirosaurinae and the longirostrine and presumably semi\u2010aquatic Pepesuchinae. The recovering of both lineages as distinct entities was also reinforced through a morphospace analysis. Pepesuchinae were notable by exploring a position of the morphospace not explored by any other Notosuchia. Their longer rostra and the assumption of them being gradually specialized to aquatic habits reflects the unique diversity of these crocodyliforms through the Cretaceous deposits of South America and Africa.<\/jats:p>","DOI":"10.1002\/ar.25559","type":"journal-article","created":{"date-parts":[[2024,8,30]],"date-time":"2024-08-30T00:46:05Z","timestamp":1724978765000},"page":"574-597","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["A new Peirosauridae (Crocodyliformes, Notosuchia) from the Adamantina Formation (Bauru Group, Late Cretaceous), with a revised phylogenetic analysis of Sebecia"],"prefix":"10.1002","volume":"308","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1482-1286","authenticated-orcid":false,"given":"Juan V.","family":"Ruiz","sequence":"first","affiliation":[{"name":"Laborat\u00f3rio de Paleontologia e Evolu\u00e7\u00e3o de Ilha Solteira FEIS\u2010UNESP  Ilha Solteira SP Brazil"},{"name":"Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o em Biologia Animal, Instituto de Biologia Letras e Ci\u00eancias Exatas, IBILCE\u2010UNESP  S\u00e3o Jos\u00e9 do Rio Preto SP Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8247-1022","authenticated-orcid":false,"given":"Marcos V. 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