Rudists (Bivalvia: Hippuritida) from the Lower Cretaceous Khalsi Formation, Ladakh, India, and their palaeogeographic implications

doi:10.1016/j.cretres.2022.105455

	Rudists (Bivalvia: Hippuritida) from the Lower Cretaceous Khalsi Formation, Ladakh, India, and their palaeogeographic implications
	Barman, Prasenjit 1,2; Swami, Narendra K.1,3; Rao, Xin 4,5; Mishra, S. R.1; Ibrahim, Mohd 1,6; Singh, Shailendra 1
刊名	CRETACEOUS RESEARCH
	2023-04-01
卷号	144 页码:14
关键词	Radiolitidae Polyconitidae Cretaceous Ladakh Khalsi Formation
ISSN号	0195-6671
DOI	10.1016/j.cretres.2022.105455
通讯作者	Barman, Prasenjit(barman.geology@gmail.com) ; Rao, Xin(xinrao@nigpas.ac.cn)
英文摘要	Rudist fauna composed of the Radiolitidae and the Polyconitidae is reported from the Aptian-Albian Khalsi Formation, southern Ladakh, India. The rudists are identified as Auroradiolites gilgitensis, A. biconvexus, Magallanesia rutogensis, and Shajia tibetica. Among them, A. biconvexus and M. rutogensis are described first time in Ladakh. Additionally, two radiolitid specimens reported from the Saltoro Formation of the SSZ in northern Ladakh by Upadhyay (2014), are assigned to A. biconvexus, and one single specimen from Saltoro Formation which was assigned to Horiopleura sp. by Upadhyay (2014), is questionably transferred to S. tibetica in this study. The occurrence of A. gilgitensis in the early Aptian of Ladakh provides evidence for the eastern dispersal pattern of A. gilgitensis during early Aptian. The finding of M. rutogensis in Ladakh fills the geographical gap between the first plagioptychid, early Turonian Plagioptychus haueri in the Mediterranean and the previous westernmost record of M. rutogensis in Lhasa Block, and further strengthens the hypothesis that Plagioptychidae was evolved from Magallanesia or related form. The association of A. biconvexus, A. gilgitensis, and M. canaliculata support the hypothesis of southwest Asian-Pacific province for the palaeobiogeographic linkage of Auroradiolites and Horiopleura haydeni-Praecaprotina-Magallanesia. This study provides additional ev-idence in favour of the relatively close geographical connection and tectonic equivalence between the Ladakh and Lhasa blocks during the mid-Cretaceous. Meanwhile, it highlights the need for detailed biostratigraphic studies in other microcontinents along the northern margin of the East Tethys, which may provide critical information for their tectonic and palaeogeographic evolution. (c) 2022 Elsevier Ltd. All rights reserved.
WOS关键词	SHYOK-SUTURE ZONE ; YASIN-TYPE RUDIST ; NORTHERN LADAKH ; RADIOLITID RUDIST ; CEBU ISLAND ; NW HIMALAYA ; DRAS ARC ; EVOLUTION ; TIBET ; 1ST
WOS研究方向	Geology ; Paleontology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000994501300001
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42147]
专题	中国科学院南京地质古生物研究所
通讯作者	Barman, Prasenjit; Rao, Xin
作者单位	1.Geol Survey India, Lucknow 226024, India 2.Banaras Hindu Univ BHU, Inst Sci, Ctr Adv Study Geol, Varanasi 221005, India 3.Geol Survey India, Jaipur 302004, India 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China 6.Geol Survey India, State Unit Jammu & Kashmir, Jammu 180006, India
推荐引用方式 GB/T 7714	Barman, Prasenjit,Swami, Narendra K.,Rao, Xin,et al. Rudists (Bivalvia: Hippuritida) from the Lower Cretaceous Khalsi Formation, Ladakh, India, and their palaeogeographic implications[J]. CRETACEOUS RESEARCH,2023,144:14.
APA	Barman, Prasenjit,Swami, Narendra K.,Rao, Xin,Mishra, S. R.,Ibrahim, Mohd,&Singh, Shailendra.(2023).Rudists (Bivalvia: Hippuritida) from the Lower Cretaceous Khalsi Formation, Ladakh, India, and their palaeogeographic implications.CRETACEOUS RESEARCH,144,14.
MLA	Barman, Prasenjit,et al."Rudists (Bivalvia: Hippuritida) from the Lower Cretaceous Khalsi Formation, Ladakh, India, and their palaeogeographic implications".CRETACEOUS RESEARCH 144(2023):14.