{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T14:05:34Z","timestamp":1792591534835,"version":"4.5.0"},"reference-count":37,"publisher":"Public Library of Science (PLoS)","issue":"6","license":[{"start":{"date-parts":[[2015,6,1]],"date-time":"2015-06-01T00:00:00Z","timestamp":1433116800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"DOI":"10.1371\/journal.pone.0128458","type":"journal-article","created":{"date-parts":[[2015,6,2]],"date-time":"2015-06-02T00:52:15Z","timestamp":1433206335000},"page":"e0128458","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":26,"title":["Reidentification of Avian Embryonic Remains from the Cretaceous of Mongolia"],"prefix":"10.1371","volume":"10","author":[{"given":"David J.","family":"Varricchio","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amy M.","family":"Balanoff","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark A.","family":"Norell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2015,6,1]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"295","DOI":"10.1080\/02724634.2009.10010384","article-title":"Assignment of <italic>Yamaceratops dorngobiensis<\/italic> and associated redbeds at Shine Us Khudag (Eastern Gobi, Dorngobi Province, Mongolia) to the redescribed Javkhlant Formation (Upper Cretaceous)","volume":"29","author":"DA Eberth","year":"2009","journal-title":"J Vertebr Paleontol"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1007\/s00114-008-0347-2","article-title":"Digital preparation of a probable neoceratopsian preserved within an egg, with comments on microstructural of ornithischian eggshells","volume":"95","author":"AM Balanoff","year":"2008","journal-title":"Naturwissenschaften"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"779","DOI":"10.1126\/science.266.5186.779","article-title":"A theropod dinosaur embryo and the affinities of the Flaming Cliffs dinosaur eggs","volume":"266","author":"MA Norell","year":"1994","journal-title":"Science"},{"key":"ref4","first-page":"88","article-title":"Dinosaur Eggs and Babies","author":"KE Mikhailov","year":"1994"},{"key":"ref5","first-page":"185","article-title":"Feathered dragons: studies on the transition from dinosaurs to birds","author":"G Grellet-Tinner","year":"2004"},{"key":"ref6","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1016\/j.palaeo.2005.10.029","article-title":"Paleobiology of dinosaur eggs and nesting behaviors","volume":"232","author":"G Grellet-Tinner","year":"2006","journal-title":"Palaeogeogr Palaeocl Palaeoecol"},{"key":"ref7","doi-asserted-by":"crossref","first-page":"931","DOI":"10.1671\/0272-4634(2004)024[0931:APAOPD]2.0.CO;2","article-title":"Cladistic analysis of eggshell characters: a phylogenic assessment of prismatic dinosaur eggs from the Cretaceous Two Medicine Formation of Montana","volume":"24","author":"DJ Varricchio","year":"2004","journal-title":"J Vertebr Paleontol"},{"key":"ref8","first-page":"1","article-title":"Phylogenetic analysis of reproductive traits of maniraptoran theropods and its implications for egg parataxonomy","volume":"2008","author":"DK Zelenitsky","year":"2008","journal-title":"Palaeontology"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"2137","DOI":"10.1126\/science.284.5423.2137","article-title":"The evolution of dinosaurs","volume":"284","author":"PC Sereno","year":"1999","journal-title":"Science"},{"key":"ref10","first-page":"39","article-title":"Living Dinosaurs: The Evolutionary History of Modern Birds","author":"J O'Connor","year":"2011"},{"key":"ref11","first-page":"1","article-title":"Zeitmuster der Ontogenesen bei nestfl\u00fcchtenenden und nesthockenden V\u00f6geln","volume":"114","author":"JM Starck","year":"1989","journal-title":"Cour Forsch Senck"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1111\/j.1096-3642.1993.tb02537.x","article-title":"Studies on skeleton formation in reptiles. v. Patterns of ossification in the skeleton of <italic>Alligator mississippiensis<\/italic> DAUDIN (Reptilia, Crocodylia)","volume":"109","author":"O Rieppel","year":"1993","journal-title":"Zool J Linn Soc\u2013Lond"},{"key":"ref13","unstructured":"Bever GS, Norell MA (2009) The perinate skull of <italic>Byronosaurus<\/italic> (Troodontidae) with observations on the cranial ontogeny of paravian theropods. Am Mus Novit No. 3657."},{"key":"ref14","doi-asserted-by":"crossref","first-page":"838","DOI":"10.1038\/nature02898","article-title":"A new troodontid dinosaur from China with avain-like sleeping posture","volume":"431","author":"X Xu","year":"2004","journal-title":"Nature"},{"issue":"9","key":"ref15","doi-asserted-by":"crossref","first-page":"e45203","DOI":"10.1371\/journal.pone.0045203","article-title":"A second soundly sleeping dragon: new anatomical details of the Chinese troodontid <italic>Mei long<\/italic> with implications for phylogeny and taphonomy","volume":"7","author":"C Gao","year":"2012","journal-title":"PLoS ONE"},{"key":"ref16","first-page":"147","article-title":"Embryonic bird skeletons from the late Cretaceous of Mongolia","volume":"42","author":"A Elzanowski","year":"1981","journal-title":"Palaeontologia Pol"},{"key":"ref17","article-title":"<italic>Yamaceratops dorngobiensis<\/italic>, a new primitive ceratopsian (Dinosauria: Ornithischia) from the Cretaceous of Mongolia","author":"PJ Makovicky","year":"2006","journal-title":"Am Mus Novit no"},{"key":"ref18","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1671\/0272-4634(2002)022[0191:LCAEWE]2.0.CO;2","article-title":"Late Cretaceous avian eggs with embryos from Argentina","volume":"22","author":"MH Schweitzer","year":"2002","journal-title":"J Vertebr Paleontol"},{"key":"ref19","doi-asserted-by":"crossref","first-page":"625","DOI":"10.1671\/0272-4634(2007)27[625:ANNDLN]2.0.CO;2","article-title":"A new ceratopsian dinosaur linking North America and Asian taxa","volume":"27","author":"BJ Chinnery","year":"2007","journal-title":"J Vertebr Paleontol"},{"key":"ref20","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1111\/j.1469-7998.2007.00329.x","article-title":"Analysis of forelimb function in basal ceratopsians","volume":"273","author":"P Senter","year":"2007","journal-title":"J Zool"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1038\/292051a0","article-title":"A new subclass of birds from the Cretaceous of South America","volume":"292","author":"CA Walker","year":"1981","journal-title":"Nature"},{"key":"ref22","unstructured":"Kurochkin EN (1996) A new enantiornithid of the Mongolian Late Cretaceous and a general appraisal of the infraclass Enantiornithes (Aves). Palaeontological Institute (Moscow) Special Issue, 60 p."},{"key":"ref23","doi-asserted-by":"crossref","first-page":"719","DOI":"10.1671\/0272-4634(2002)022[0719:AAEFTC]2.0.CO;2","article-title":"An avian egg from the Campanian of Bayn Dzak, Mongolia","volume":"22","author":"G Grellet-Tinner","year":"2002","journal-title":"J Vertebr Paleontol"},{"key":"ref24","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1016\/j.cretres.2009.11.006","article-title":"A study of a <italic>Troodon<\/italic> egg containing embryonic remains using epifluorescence microscopy and other techniques","volume":"31","author":"FD Jackson","year":"2010","journal-title":"Cretaceous Res"},{"key":"ref25","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.cretres.2011.11.014","article-title":"New alvarezsaurid (Dinosauria, Theropoda) from uppermost Cretaceous of north-western Patagonia with associated eggs","volume":"35","author":"FL Agnolin","year":"2012","journal-title":"Cretaceous Res"},{"key":"ref26","first-page":"193","article-title":"Classification of fossil eggshells of amniotic vertebrates","volume":"36","author":"KE Mikhailov","year":"1991","journal-title":"Acta Palaeontol Pol"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1080\/08912963.2013.829824","article-title":"Eggshell structure, parataxonomy and phylogenetic analysis: some notes on articles published from 2002 to 2011","volume":"26","author":"KE Mikhailov","year":"2014","journal-title":"Historical Biology"},{"key":"ref28","first-page":"11","article-title":"Sabath&apos;s &quot;larger avian eggs&quot; from the Gobi Cretaceous","volume":"60","author":"DJ Varricchio","journal-title":"Acta Palaeontol Pol"},{"key":"ref29","doi-asserted-by":"crossref","first-page":"653","DOI":"10.1126\/science.1100000","article-title":"A precocial avian embryo from the Lower Cretaceous of China","volume":"306","author":"Z Zhou","year":"2004","journal-title":"Science"},{"key":"ref30","doi-asserted-by":"crossref","first-page":"1252","DOI":"10.1134\/S0031030113110087","article-title":"An embryonic enantiornithine bird and associated eggs from the Cretaceous of Mongolia","volume":"47","author":"EN Kurochkin","year":"2013","journal-title":"Paleontol J"},{"key":"ref31","first-page":"178","article-title":"The evolution of parental care in birds with reference to fossil embryos","volume":"1","author":"A Elzanowski","year":"1985","journal-title":"Acta XVIII Cong. Inter. Ornithology"},{"key":"ref32","first-page":"133","article-title":"Protoceratopsidae (Dinosauria) of Asia","volume":"33","author":"T Maryanska","year":"1975","journal-title":"Palaeontol Pol"},{"key":"ref33","doi-asserted-by":"crossref","first-page":"380","DOI":"10.1038\/283380a0","article-title":"Juvenile ceratopsians from Mongolia \u2013 the smallest known dinosaur specimens","volume":"283","author":"WP Coombs Jr","year":"1980","journal-title":"Nature"},{"key":"ref34","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1038\/431145a","article-title":"Parental care in an ornithischian dinosaur","volume":"431","author":"Q Meng","year":"2004","journal-title":"Nature"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"1035","DOI":"10.1666\/11-008.1","article-title":"A nest of Protoceratops andrewsi (Dinosauria, Ornithischia)","volume":"85","author":"DE Fastovsky","year":"2011","journal-title":"J Paleontol"},{"key":"ref36","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1017\/S1477201906001969","article-title":"A new enantiornithine bird from the Late Cretaceous of the Gobi Desert","volume":"5","author":"LM Chiappe","year":"2007","journal-title":"J Syst Paleontol"},{"key":"ref37","first-page":"268","article-title":"Mesozoic Birds: Above the Heads of Dinosaurs","author":"CA Forster","year":"2002"}],"container-title":["PLOS ONE"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/dx.plos.org\/10.1371\/journal.pone.0128458","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2018,10,23]],"date-time":"2018-10-23T05:41:35Z","timestamp":1540273295000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0128458"}},"subtitle":[],"editor":[{"given":"Peter","family":"Dodson","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2015,6,1]]},"references-count":37,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2015,6,1]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0128458","relation":{},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,6,1]]}}}