干旱区生态环境知识资源中心(Arid): Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia-a possible new specimen of Nemegtosaurus

Arid

DOI	10.4202/app.00596.2019
	Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia-a possible new specimen of Nemegtosaurus
	Averianov, Alexander O.1,2,3; Lopatin, Alexey, V 4
通讯作者	Averianov, Alexander O.
来源期刊	ACTA PALAEONTOLOGICA POLONICA
ISSN	0567-7920
EISSN	1732-2421
出版年	2019
卷号	64 期号:2 页码:313-321
英文摘要	Currently, there are two sauropod taxa known from the Upper Cretaceous (Maastrichtian) Nemegt Formation of Gobi Desert, Mongolia: Nemegtosaurus from the Nemegt locality and Opisthocoelicaudia from the Altan Uul IV locality. Both taxa are represented by not overlapping elements (skull and partial postcranial skeleton respectively), which arises question on their possible synonymy. Five articulated sauropod dorsal vertebrae (PIN 3837/P821, dorsals 6-10) were found in 1949 by the Mongolian Expedition of the Academy of Sciences of the USSR at the Nemegt locality. This specimen is similar to Opisthocoelicaudia in having a strong ventral ridge on dorsal centra, a low neural arch which is anteroposteriorly narrowest at the junction with the centrum and widens dorsally, and lack of hyposphene-hypantrum articulations. PIN 3837/P821 differs from Opisthocoelicaudia by having the less dorsoventrally flattened dorsal centra, a shallow ventral concavity of dorsal centra in lateral view, a vertical posterior centrodiapophyseal lamina (pcdl) in dorsals 8 and 9, a postzygodiapophyseal lamina (podl) that roofs the centrodiapophyseal fossa (pocdf), and strongly developed accessory laminae within the parapophyseal centrodiapophyseal fossa (pacdf). The sauropod femora from Nemegt Formation differ from the femur of Opisthocoelicaudia by the medial condyle extending more distally compared with the lateral condyle. Most likely these femora and PIN 3837/P821 belong to Nemegtosaurus, which would make this taxon distinct from Opisthocoelicaudia by discussed characters of dorsal vertebrae and femur.
英文关键词	Dinosauria Sauropoda Nemegtosaurus Upper Cretaceous Nemegt Formation Mongolia
类型	Article
语种	英语
国家	Russia
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000470965100008
WOS关键词	EARLY EVOLUTION ; REDESCRIPTION ; TITANOSAURIA ; DINOSAURIA ; PHYLOGENY
WOS类目	Paleontology
WOS研究方向	Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213853
作者单位	1.Russian Acad Sci, Zool Inst, Univ Skaya Nab 1, St Petersburg 199034, Russia; 2.St Petersburg State Univ, Inst Earth Sci, 16 Liniya VO 29, St Petersburg 199178, Russia; 3.Kazan Fed Univ, Inst Geol & Petr Technol, Kremlevskaya Str 4-5, Kazan 420008, Russia; 4.Russian Acad Sci, Borissiak Paleontol Inst, Profsouznaya Ul 123, Moscow 117997, Russia
推荐引用方式 GB/T 7714	Averianov, Alexander O.,Lopatin, Alexey, V. Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia-a possible new specimen of Nemegtosaurus[J],2019,64(2):313-321.
APA	Averianov, Alexander O.,&Lopatin, Alexey, V.(2019).Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia-a possible new specimen of Nemegtosaurus.ACTA PALAEONTOLOGICA POLONICA,64(2),313-321.
MLA	Averianov, Alexander O.,et al."Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia-a possible new specimen of Nemegtosaurus".ACTA PALAEONTOLOGICA POLONICA 64.2(2019):313-321.