干旱区生态环境知识资源中心(Arid): A new titanosaurian (Dinosauria: Sauropoda) from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Egypt

Arid

DOI	10.1080/02724634.2023.2199810
	A new titanosaurian (Dinosauria: Sauropoda) from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Egypt
	Gorscak, Eric; Lamanna, Matthew C.; Schwarz, Daniela; Diaz, Veronica Diez; Salem, Belal S.; Sallam, Hesham M.; Wiechmann, Marc Filip
通讯作者	Gorscak, E
来源期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
EISSN	1937-2809
出版年	2022
卷号	42 期号:6
英文摘要	Dinosaur fossils from the latest Cretaceous (Campanian-Maastrichtian) of Africa and the Arabian Peninsula are rare. Most discoveries to date have consisted of limited fossils that have precluded detailed phylogenetic and paleobiogeographic interpretations. Fortunately, recent discoveries such as the informative Egyptian titanosaurian sauropod dinosaur Mansourasaurus shahinae are beginning to address these long-standing issues. Here we describe an associated partial postcranial skeleton of a new titanosaurian taxon from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Western Desert of Egypt. Consisting of five dorsal vertebrae and 12 appendicular elements, Igai semkhu gen. et sp. nov. constitutes one of the most informative dinosaurs yet recovered from the latest Cretaceous of Afro-Arabia. The relatively gracile limb bones and differences in the coracoid and metatarsal I preclude referral of the new specimen to Mansourasaurus. Both model-based Bayesian tip-dating and parsimony-based phylogenetic analyses support the affinities of Igai semkhu with other Late Cretaceous Afro-Eurasian titanosaurs (e.g., Mansourasaurus, Lirainosaurus astibiae, Opisthocoelicaudia skarzynskii), a conclusion supported by posterior dorsal vertebrae that lack a postzygodiapophyseal lamina, for example. Igai semkhu strengthens the hypothesis that northern Africa and Eurasia shared closely related terrestrial tetrapod faunas at the end of the Cretaceous and further differentiates this fauna from penecontemporaneous assemblages elsewhere in Africa, such as the Galula Formation in Tanzania, that exhibit more traditional Gondwanan assemblages. At present, the specific paleobiogeographic signal appears to vary between different dinosaur groups, suggesting that Afro-Arabian Cretaceous biotas may have experienced evolutionary and paleobiogeographic histories that were more complex than previously appreciated.
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001032852500001
WOS关键词	RUKWA RIFT BASIN ; RED SANDSTONE GROUP ; JAMES ROSS BASIN ; TERRESTRIAL VERTEBRATES ; UBERABATITAN-RIBEIROI ; GALULA FORMATION ; WESTERN DESERT ; NEUQUEN BASIN ; MINAS-GERAIS ; SP NOV.
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/2XILL650/393631
推荐引用方式 GB/T 7714	Gorscak, Eric,Lamanna, Matthew C.,Schwarz, Daniela,et al. A new titanosaurian (Dinosauria: Sauropoda) from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Egypt[J],2022,42(6).
APA	Gorscak, Eric.,Lamanna, Matthew C..,Schwarz, Daniela.,Diaz, Veronica Diez.,Salem, Belal S..,...&Wiechmann, Marc Filip.(2022).A new titanosaurian (Dinosauria: Sauropoda) from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Egypt.JOURNAL OF VERTEBRATE PALEONTOLOGY,42(6).
MLA	Gorscak, Eric,et al."A new titanosaurian (Dinosauria: Sauropoda) from the Upper Cretaceous (Campanian) Quseir Formation of the Kharga Oasis, Egypt".JOURNAL OF VERTEBRATE PALEONTOLOGY 42.6(2022).