{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T14:10:11Z","timestamp":1773411011576,"version":"3.50.1"},"reference-count":89,"publisher":"The Royal Society","issue":"6","license":[{"start":{"date-parts":[[2025,6,1]],"date-time":"2025-06-01T00:00:00Z","timestamp":1748736000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,6,1]],"date-time":"2025-06-01T00:00:00Z","timestamp":1748736000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"PICT"}],"content-domain":{"domain":["royalsocietypublishing.org"],"crossmark-restriction":true},"short-container-title":["R. Soc. Open Sci."],"published-print":{"date-parts":[[2025,6]]},"abstract":"<jats:p>\n                    <jats:italic toggle=\"yes\">Tropidosuchus romeri<\/jats:italic>\n                    is a member of the clade Proterochampsidae (non-Archosauria Archosauriformes) collected from Upper Triassic (lower Carnian) outcrops of the Cha\u00f1ares Formation of the Ischigualasto-Villa Uni\u00f3n Basin (La Rioja Province, Argentina). This species is a non-rhadinosuchine proterochampsid known from several specimens, including almost complete skeletons. Here, we describe and compare in detail the skull of\n                    <jats:italic toggle=\"yes\">T. romeri<\/jats:italic>\n                    based on direct observation of specimens and the three-dimensional segmentation of one of them based on computed microtomography scans. Contrasting with previous studies, we were able to determine sutures between bones and individualize each element digitally.\n                    <jats:italic toggle=\"yes\">Tropidosuchus romeri<\/jats:italic>\n                    shares with rhadinosuchines the presence of a crest on the lateral surface of the jugal and a main body of the postorbital with a projection onto the orbit. Features such as a short preorbital region (less than half of skull length), well-developed anterolateral processes of the frontals, premaxilla without anteroventrally oriented alveolar margin, a maxilla restricted to the lateral wall of the rostrum, and a skull roof ornamentation composed of crests without a radial arrangement are probably autapomorphies. Future studies will focus on the postcranial anatomy and on an integration of the new information to test quantitatively the phylogenetic relationships of the species.\n                  <\/jats:p>","DOI":"10.1098\/rsos.250248","type":"journal-article","created":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T19:06:57Z","timestamp":1749582417000},"update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Osteology of the skull of\n                    <i>Tropidosuchus romeri<\/i>\n                    (Archosauriformes: Proterochampsidae)"],"prefix":"10.1098","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-6977-1240","authenticated-orcid":true,"given":"Claudio A.","family":"Mamani","sequence":"first","affiliation":[{"name":"Instituto de Geolog\u00eda Emiliano P. Aparicio INGEO-CIGEOBIO, Universidad Nacional de San Juan, Facultad de Ciencias Exactas F\u00edsicas y Naturales","place":["San Juan, Argentina"]},{"name":"Consejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8624-4297","authenticated-orcid":true,"given":"M. Jimena","family":"Trotteyn","sequence":"additional","affiliation":[{"name":"Instituto de Geolog\u00eda Emiliano P. Aparicio INGEO-CIGEOBIO, Universidad Nacional de San Juan, Facultad de Ciencias Exactas F\u00edsicas y Naturales","place":["San Juan, Argentina"]},{"name":"Consejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando E.","family":"Novas","sequence":"additional","affiliation":[{"name":"Consejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]},{"name":"Departamento de Ciencias Naturales y Antropolog\u00eda, Fundaci\u00f3n de Historia Natural \u2018F\u00e9lix de Azara\u2019, Universidad Maim\u00f3nides","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2739-3276","authenticated-orcid":true,"given":"Julia B.","family":"Desojo","sequence":"additional","affiliation":[{"name":"Consejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]},{"name":"Divisi\u00f3n Paleovertebrados, Universidad Nacional de la Plata","place":["La Plata, Argentina"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6000-6450","authenticated-orcid":true,"given":"Mart\u00edn D.","family":"Ezcurra","sequence":"additional","affiliation":[{"name":"Consejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]},{"name":"Secci\u00f3n Paleontolog\u00eda de Vertebrados, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia'","place":["Ciudad Aut\u00f3noma de Buenos Aires, Argentina"]},{"name":"School of Geography, Earth and Environmental Sciences, University of Birmingham","place":["Birmingham, UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"175","published-online":{"date-parts":[[2025,6,11]]},"reference":[{"key":"e_1_3_8_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.215.4539.1501"},{"key":"e_1_3_8_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0012-821X(03)00347-9"},{"key":"e_1_3_8_4_2","doi-asserted-by":"publisher","DOI":"10.1130\/B25215.1"},{"key":"e_1_3_8_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1213454"},{"key":"e_1_3_8_6_2","doi-asserted-by":"publisher","DOI":"10.1098\/rstb.1998.0225"},{"key":"e_1_3_8_7_2","doi-asserted-by":"publisher","DOI":"10.1017\/S1464793103006134"},{"key":"e_1_3_8_8_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-185X.2009.00094.x"},{"key":"e_1_3_8_9_2","first-page":"9","volume-title":"Anatomy, phylogeny and palaeobiology of early archosaurs and their kin, vol. 379","author":"Ezcurra M","year":"2013","unstructured":"Ezcurra M, Butler R, Gower D. 2013 \u2018Proterosuchia\u2019: the origin and early history of Archosauriformes. In Anatomy, phylogeny and palaeobiology of early archosaurs and their kin, vol. 379 (eds SJ Nesbitt, JB Desojo, RB Irmis), pp. 9\u201333. London, UK: Geological Society, Special Publication."},{"key":"e_1_3_8_10_2","doi-asserted-by":"publisher","DOI":"10.5710\/AMGH.18.01.2021.3416"},{"key":"e_1_3_8_11_2","doi-asserted-by":"publisher","DOI":"10.1144\/SP379.6"},{"key":"e_1_3_8_12_2","doi-asserted-by":"publisher","DOI":"10.1144\/SP379.13"},{"key":"e_1_3_8_13_2","doi-asserted-by":"publisher","DOI":"10.1144\/SP379.23"},{"key":"e_1_3_8_14_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13358-024-00309-6"},{"key":"e_1_3_8_15_2","first-page":"88A","article-title":"Revision of Proterochampsa barrionuevoi and Proterochampsidae (Reptilia; Archosauriformes) from the Late Triassic of Argentina and Brazil","volume":"29","author":"Dilkes DW","year":"2009","unstructured":"Dilkes DW, Arcucci AB. 2009 Revision of Proterochampsa barrionuevoi and Proterochampsidae (Reptilia; Archosauriformes) from the Late Triassic of Argentina and Brazil. J. Vertebr. Paleontol 29, 88A. (doi:10.1111\/j.1475-4983.2012.01170.x)","journal-title":"J. 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