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A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China.
An Acad Bras Cienc. 2019; 91Suppl 2(Suppl 2):e20160920.AA

Abstract

A new saurolophine hadrosaurid, Laiyangosaurus youngi gen. et sp. nov. is described and phylogenetically analyzed based on several cranial elements from the Jingangkou Formation, Wangshi Group, Upper Cretaceous of Laiyang, Shandong, China. Laiyangosaurus youngi differs from other members of the saurolophine clade on the basis of a number of autapomorphies, including a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge that runs along most of the maxillary tooth row that is slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorlly recurved, and orbital margins that are wider than the infratemporal margins of the jugal. This new taxon can be further distinguished by a number of unique combination of characters, including dorsal margin of nasal is flat, absence supracranial crest, a relatively shallow and rostrodorsally directed caudal margin of the lacrimal process of the jugal, and one or more foramina present on the rostral surface of the premaxilla. A phylogenetic analysis indicates that L. youngi comprises a monophyletic clade, which is known as Edmontosaurini.

Authors+Show Affiliations

Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China. University of Chinese Academy of Sciences, Beijing, 100049, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China. University of Chinese Academy of Sciences, Beijing, 100049, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China.Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China. University of Chinese Academy of Sciences, Beijing, 100049, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28876393

Citation

Zhang, Jialiang, et al. "A New Saurolophine Hadrosaurid (Dinosauria: Ornithopoda) From the Upper Cretaceous of Shandong, China." Anais Da Academia Brasileira De Ciencias, vol. 91Suppl 2, no. Suppl 2, 2019, pp. e20160920.
Zhang J, Wang X, Wang Q, et al. A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China. An Acad Bras Cienc. 2019;91Suppl 2(Suppl 2):e20160920.
Zhang, J., Wang, X., Wang, Q., Jiang, S., Cheng, X., Li, N., & Qiu, R. (2019). A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China. Anais Da Academia Brasileira De Ciencias, 91Suppl 2(Suppl 2), e20160920. https://doi.org/10.1590/0001-3765201720160920
Zhang J, et al. A New Saurolophine Hadrosaurid (Dinosauria: Ornithopoda) From the Upper Cretaceous of Shandong, China. An Acad Bras Cienc. 2019;91Suppl 2(Suppl 2):e20160920. PubMed PMID: 28876393.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China. AU - Zhang,Jialiang, AU - Wang,Xiaolin, AU - Wang,Qiang, AU - Jiang,Shunxing, AU - Cheng,Xin, AU - Li,Ning, AU - Qiu,Rui, Y1 - 2017/08/31/ PY - 2017/01/06/received PY - 2017/04/04/accepted PY - 2017/9/7/pubmed PY - 2019/2/23/medline PY - 2017/9/7/entrez SP - e20160920 EP - e20160920 JF - Anais da Academia Brasileira de Ciencias JO - An Acad Bras Cienc VL - 91Suppl 2 IS - Suppl 2 N2 - A new saurolophine hadrosaurid, Laiyangosaurus youngi gen. et sp. nov. is described and phylogenetically analyzed based on several cranial elements from the Jingangkou Formation, Wangshi Group, Upper Cretaceous of Laiyang, Shandong, China. Laiyangosaurus youngi differs from other members of the saurolophine clade on the basis of a number of autapomorphies, including a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge that runs along most of the maxillary tooth row that is slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorlly recurved, and orbital margins that are wider than the infratemporal margins of the jugal. This new taxon can be further distinguished by a number of unique combination of characters, including dorsal margin of nasal is flat, absence supracranial crest, a relatively shallow and rostrodorsally directed caudal margin of the lacrimal process of the jugal, and one or more foramina present on the rostral surface of the premaxilla. A phylogenetic analysis indicates that L. youngi comprises a monophyletic clade, which is known as Edmontosaurini. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/28876393/A_new_saurolophine_hadrosaurid__Dinosauria:_Ornithopoda__from_the_Upper_Cretaceous_of_Shandong_China_ L2 - https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017005020113&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -