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Shape variation additionally reflects upon various feeding strategies and are thus informative for the palaeoecological interpretation of extinct species based on fossils. The mandibular anatomy of non\u2010baenid paracryptodires has so far been undescribed. Based on digital segmentation of a computed tomography scan, I herein describe the mandible of the pleurosternid paracryptodire <jats:italic>Glyptops ornatus<\/jats:italic>. This taxon has a slender and gracile jaw, with weakly developed muscle attachment sites for adductor muscles (i.e., adductor fossa, coronoid process, and retroarticular process) and strongly reduced triturating ridges. These features are typical for suction\u2010feeding aquatic hunters, thereby contrasting with the robust, durophagous\u2010adapted mandibles of many baenid or compsemydid paracryptodires. In addition, the mandible of <jats:italic>G. ornatus<\/jats:italic> is characterized by the presence of a large splenial with a dorsal splenial\u2013dentary contact, the presence of a splenial foramen, and the strong reduction of the foramen dentofaciale majus and the absence of a posterior intermandibular foramen.<\/jats:p>","DOI":"10.1002\/ar.25320","type":"journal-article","created":{"date-parts":[[2023,9,25]],"date-time":"2023-09-25T09:15:24Z","timestamp":1695633324000},"page":"2007-2017","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Mandibular anatomy of the paracryptodire <i>Glyptops ornatus<\/i> supports active hunting behavior in a Jurassic turtle"],"prefix":"10.1002","volume":"307","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2393-5621","authenticated-orcid":false,"given":"Serjoscha W.","family":"Evers","sequence":"first","affiliation":[{"name":"Department of Geosciences University of Fribourg  Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,9,25]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/jmor.1051490203"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.3374\/014.058.0205"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/02724634.1991.10011400"},{"issue":"6","key":"e_1_2_8_5_1","first-page":"3","article-title":"A new latest Jurassic vertebrate fauna, from the highest levels of the Morrison formation at Como bluff, Wyoming, with comments on Morrison biochronology. 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