{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T10:15:17Z","timestamp":1789726517426,"version":"4.0.1"},"reference-count":46,"publisher":"The Royal Society","issue":"11","license":[{"start":{"date-parts":[[2015,11,1]],"date-time":"2015-11-01T00:00:00Z","timestamp":1446336000000},"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":["R. Soc. open sci."],"published-print":{"date-parts":[[2015,11]]},"abstract":"<jats:p>\n            Dental morphology and patterns of tooth replacement in representatives of the clade Pliosauridae (Reptilia, Sauropterygia) are evaluated in detail. The jaws of one basal (\n            <jats:italic>Thalassiodracon hawkinsii<\/jats:italic>\n            ) and two derived species (\n            <jats:italic>Pliosaurus<\/jats:italic>\n            <jats:italic>carpenteri<\/jats:italic>\n            ,\n            <jats:italic>Pliosaurus kevani<\/jats:italic>\n            ) were visualized by \u03bcCT scans, and the ontogenetic patterns, or \u2018movement paths\u2019, of replacement teeth could be mapped. Other specimens (\n            <jats:italic>Peloneustes philarchus<\/jats:italic>\n            and\n            <jats:italic>Pliosaurus westbuyensis<\/jats:italic>\n            ) with well-preserved jaws containing functional and replacement teeth\n            <jats:italic>in situ<\/jats:italic>\n            were also examined directly, and waves of tooth replacement could be inferred from the degree of\n            <jats:italic>in situ<\/jats:italic>\n            tooth development and the fusion between functional and replacement alveoli. The analysis revealed symmetrical tooth eruption over the medial axis throughout the length of the jaw in the basal pliosaurid\n            <jats:italic>Thalassiodracon<\/jats:italic>\n            . By contrast, symmetrical tooth eruption patterns occur only along the anterior sections of the jaws of derived pliosaurids. In\n            <jats:italic>Pliosaurus<\/jats:italic>\n            , replacement schedules differ in the anterior and posterior portions of the jaws and appear to correlate with differences in tooth morphology and symmetrical replacement. The anterior teeth exhibit longer replacement cycle periods and symmetrical replacement, while shorter cycle periods and asymmetry are seen posteriorly. A longer period suggests slower replacement and is characteristic of large, specialized caniniform teeth in the longer snouted Late Jurassic taxa. Smaller posterior teeth have a shorter period and therefore a faster replacement cycle. The transition from long to short replacement period over the length of the jaw is thought to account for the loss of symmetry. This differentiation could relate to differential tooth function and a type of heterodonty. We therefore propose a new model of pliosaurid tooth replacement patterns and present it in a phylogenetic context.\n          <\/jats:p>","DOI":"10.1098\/rsos.150384","type":"journal-article","created":{"date-parts":[[2015,11,4]],"date-time":"2015-11-04T18:20:57Z","timestamp":1446661257000},"page":"150384","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":41,"title":["Dental ontogeny and replacement in Pliosauridae"],"prefix":"10.1098","volume":"2","author":[{"given":"Judyth","family":"Sassoon","sequence":"first","affiliation":[{"name":"School of Earth Sciences, University of Bristol, Wills Memorial Building, Queen\u2019s Road, Bristol BS8 1RJ, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Davide","family":"Foffa","sequence":"additional","affiliation":[{"name":"School of GeoSciences, Grant Institute, University of Edinburgh, The King\u2019s Buildings, James Hutton Road, Edinburgh EH9 3FE, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan","family":"Marek","sequence":"additional","affiliation":[{"name":"Department of Musculoskeletal Biology, University of Liverpool, Duncan Building, Daulby Street, Liverpool L69 3GE, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2015,11]]},"reference":[{"key":"e_1_3_6_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12542-011-0115-z"},{"key":"e_1_3_6_3_2","first-page":"117","volume-title":"Biology of the reptilia. 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