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dc.contributor.authorJin, Xingsheng
dc.contributor.authorVarricchio, David J.
dc.contributor.authorPoust, Ashley W.
dc.contributor.authorHe, Tao
dc.identifier.citationJin, Xingsheng, David J. Varricchio, Ashley W. Poust, and Tao He. “An Oviraptorosaur Adult-Egg Association from the Cretaceous of Jiangxi Province, China.” Journal of Vertebrate Paleontology 39, no. 6 (November 2, 2019): e1739060. doi:10.1080/02724634.2019.1739060.en_US
dc.description.abstractWith abundant well-preserved clutches and several adult-clutch associations, oviraptorids provide some of the most detailed information on reproduction for dinosaurs. Here, we describe an oviraptorosaur closely associated with two eggs from the Upper Cretaceous Nanxiong Formation of Jiangxi Province, China, and discuss its implications for various reproductive hypotheses. The specimen consists of a partial skeleton (gastralia, pelvis, portions of both hind limbs, and tail), with one egg within the pelvic canal and the other just posterior to it, ventral to the anterior caudal vertebrae. Several geopetal features indicate that the individual came to rest on its left side, with the eggs likely extruded during buildup of abdominal gases during decomposition. Similarity of pubis, caudal vertebrae, and pes dimensions to recently described material from the formation, e.g., Tongtianlong and Jiangxisaurus, suggests oviraptorid affinities. The specimen provides additional association of elongatoolithid eggs and the oogenus Macroolithus with oviraptorosaurs and further evidence for monoautochronic ovulation, i.e., iterative laying of two eggs at daily or greater intervals. With each egg 36–48% the size predicted for a modern bird of the same adult mass, total egg production would be slightly lower to similar between this non-avian maniraptoran and Neornithes. Histological tissues and open neurocentral sutures indicate that this reproductively active individual was several years old but still growing at the time of death, a pattern observed in other non-avian maniraptorans. The complete absence of medullary bone in this egg-bearing individual may challenge the identification of this tissue in other dinosaurs more distantly related to birds.en_US
dc.rightsThis is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Vertebrate Paleontology on 2019-11-01, available online: © This manuscript version is made available under the CC-BY 4.0 license.en_US
dc.titleAn oviraptorosaur adult-egg association from the Cretaceous of Jiangxi Province, Chinaen_US
mus.citation.journaltitleJournal of Vertebrate Paleontologyen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US

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