{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T05:13:53Z","timestamp":1791350033148,"version":"4.3.1"},"reference-count":44,"publisher":"The Royal Society","issue":"1804","license":[{"start":{"date-parts":[[2015,4,7]],"date-time":"2015-04-07T00:00:00Z","timestamp":1428364800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/royalsociety.org\/journals\/ethics-policies\/data-sharing-mining\/"}],"content-domain":{"domain":["royalsocietypublishing.org"],"crossmark-restriction":true},"short-container-title":["Proc. R. Soc. B."],"published-print":{"date-parts":[[2015,4,7]]},"abstract":"<jats:p>\n                    Amazonia contains one of the world's richest biotas, but origins of this diversity remain obscure. Onset of the Amazon River drainage at approximately 10.5 Ma represented a major shift in Neotropical ecosystems, and proto-Amazonian biotas just prior to this pivotal episode are integral to understanding origins of Amazonian biodiversity, yet vertebrate fossil evidence is extraordinarily rare. Two new species-rich bonebeds from late Middle Miocene proto-Amazonian deposits of northeastern Peru document the same hyperdiverse assemblage of seven co-occurring crocodylian species. Besides the large-bodied\n                    <jats:italic>Purussaurus<\/jats:italic>\n                    and\n                    <jats:italic>Mourasuchus<\/jats:italic>\n                    , all other crocodylians are new taxa, including a stem caiman\u2014\n                    <jats:italic>Gnatusuchus pebasensis<\/jats:italic>\n                    \u2014bearing a massive shovel-shaped mandible, procumbent anterior and globular posterior teeth, and a mammal-like diastema. This unusual species is an extreme exemplar of a radiation of small caimans with crushing dentitions recording peculiar feeding strategies correlated with a peak in proto-Amazonian molluscan diversity and abundance. These faunas evolved within dysoxic marshes and swamps of the long-lived Pebas Mega-Wetland System and declined with inception of the transcontinental Amazon drainage, favouring diversification of longirostrine crocodylians and more modern generalist-feeding caimans. The rise and demise of distinctive, highly productive aquatic ecosystems substantially influenced evolution of Amazonian biodiversity hotspots of crocodylians and other organisms throughout the Neogene.\n                  <\/jats:p>","DOI":"10.1098\/rspb.2014.2490","type":"journal-article","created":{"date-parts":[[2015,2,26]],"date-time":"2015-02-26T11:12:54Z","timestamp":1424949174000},"page":"20142490","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":116,"title":["A Miocene hyperdiverse crocodylian community reveals peculiar trophic dynamics in proto-Amazonian mega-wetlands"],"prefix":"10.1098","volume":"282","author":[{"given":"Rodolfo","family":"Salas-Gismondi","sequence":"first","affiliation":[{"name":"Institut des Sciences de l\u2019\u00c9volution, Universit\u00e9 de Montpellier, CNRS, IRD EPHE, Montpellier 34095, France"},{"name":"Departamento de Paleontolog\u00eda de Vertebrados, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Avenida Arenales 1256, Lima 14, Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John J.","family":"Flynn","sequence":"additional","affiliation":[{"name":"Division of Paleontology, American Museum of Natural History, New York, NY 10024-5192, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrice","family":"Baby","sequence":"additional","affiliation":[{"name":"G\u00e9osciences-Environnements Toulouse, Universit\u00e9 de Toulouse, UPS (SVT-OMP), CNRS, IRD, 14 Avenue \u00c9douard Belin, Toulouse 31400, France"},{"name":"Convenio IRD-PeruPetro, Avenida Luis Aldana 320, San Borja, Lima, Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julia V.","family":"Tejada-Lara","sequence":"additional","affiliation":[{"name":"Departamento de Paleontolog\u00eda de Vertebrados, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Avenida Arenales 1256, Lima 14, Peru"},{"name":"Florida Museum of Natural History and Department of Biology, University of Florida, PO BOX 117800, Gainesville, FL 32611, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank P.","family":"Wesselingh","sequence":"additional","affiliation":[{"name":"Naturalis Biodiversity Center, P.O. 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