{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T11:50:58Z","timestamp":1783684258170,"version":"3.55.0"},"reference-count":41,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2018,11,29]],"date-time":"2018-11-29T00:00:00Z","timestamp":1543449600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["anatomypubs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Anatomical Record"],"published-print":{"date-parts":[[2019,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Teeth are continually replaced in most of non\u2010mammalian gnathostomes to maintain their functional dentitions. To clarify the tooth replacement patterns in tyrannosaurid theropod dinosaurs, we examined well\u2010preserved dentitions (both premaxillae, left maxilla, partial right maxilla, and both dentaries) of a juvenile <jats:italic>Tarbosaurus bataar<\/jats:italic> (MPC\u2010D 107\/7) using X\u2010ray computed tomographic (CT) imaging. Three\u2010dimensional (3D) rendering of the dentitions and staging of replacement teeth allowed quantitative analyses of the tooth ontogeny and replacement patterns in this specimen. These strategies were validated by comparing the results between MPC\u2010D 107\/7 and extant crocodilians, which are taxa that have previously been studied using non\u2010CT methods. 3D\u2010rendered dentitions of MPC\u2010D 107\/7 showed alternate replacement patterns between odd\u2010 and even\u2010numbered alveoli. Such patterns were discontinuous at the premaxilla\u2010maxilla junctions, suggesting the division of replacement patterns between the two dentitions possessing morpho\u2010functionally different features. The replacement process in the odd\u2010numbered alveoli of the left maxilla sequentially proceeded from distal alveoli. Meanwhile, in the both dentaries, there were simple alternate patterns in which functional teeth would be simultaneously shed out in every second alveoli. Such a simple alternation had never been reported in the adult tyrannosaurid dentaries. Under this pattern, the half of functional teeth in a single dentition would be shed at the same time, which may hamper foraging functions. We conclude that the simple alternate patterns found in the dentary dentitions of MPC\u2010D 107\/7 represent transient condition in juvenile tyrannosaurids, suggesting ontogenetic changes in tooth replacement patterns in the tyrannosaurid dentary. Anat Rec, 302:1210\u20131225, 2019. \u00a9 2018 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/ar.24014","type":"journal-article","created":{"date-parts":[[2018,10,31]],"date-time":"2018-10-31T06:44:14Z","timestamp":1540968254000},"page":"1210-1225","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Description of Tooth Ontogeny and Replacement Patterns in a Juvenile <i>Tarbosaurus bataar<\/i> (Dinosauria: Theropoda) Using CT\u2010Scan Data"],"prefix":"10.1002","volume":"302","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5147-7840","authenticated-orcid":false,"given":"Tomoya","family":"Hanai","sequence":"first","affiliation":[{"name":"Department of Earth and Planetary Science The University of Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takanobu","family":"Tsuihiji","sequence":"additional","affiliation":[{"name":"Department of Earth and Planetary Science The University of Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,11,29]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-7998.1978.tb03306.x"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/9781118274071"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/srep20252"},{"key":"e_1_2_7_5_1","first-page":"110","article-title":"Toward understanding phylogenetic and ontogenetic tooth loss in Archosauria: Documenting patterns of tooth replacement in Tyrannosaurus rex","volume":"2016","author":"Carr TD","year":"2016","journal-title":"J Vert Paleontol"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0069235"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1558-5646.1972.tb01948.x"},{"key":"e_1_2_7_8_1","first-page":"967","article-title":"Dentitional organization and function in a Triassic reptile","volume":"55","author":"DeMar R","year":"1981","journal-title":"J Paleontol"},{"key":"e_1_2_7_9_1","doi-asserted-by":"crossref","unstructured":"EdmundAG.1960. 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