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DOI	10.1111/1755-6724.14424
	On the Validity and Evolution of Assilina Species during the Ypresian-Lutetian: Example from Bir Dakhl, Eastern Desert, Egypt
	Al Menoufy, Safia; Boukhary, Mohamed
通讯作者	Al Menoufy, S (corresponding author), Univ Ain Shams, Fac Educ, Dept Biol & Geol Sci, Cairo 11341, Egypt.
来源期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN	1000-9515
EISSN	1755-6724
出版年	2021
卷号	95 期号:4 页码:1080-1085
英文摘要	The genus Assilina is a taxon within the Nummulitacea that appeared early in the Ypresian (Early Eocene) and continued until the end of the Lutetian (Middle Eocene). Thus, this taxon could be useful for the chronostratigraphy of this time interval. Lower Eocene rocks in southern Galala, Egypt are exposed at Bir Dakhl. This section includes marl sediments with debris flow shallow-marine facies deposits laid down during early Eocene times and includes fossils of large foraminifera: Assilina placentula Deshayes, 1838 and Nummulites burdigalensis de la Harpe, 1926. These are systematically treated, described and illustrated. Nummulites burdigalensis belongs to the N. burdigalensis group, and Assilina placentula belongs to the group of Assilina exponens. This assumption is based on qualitative morphology and quantitative measurements. Both species, together with Operculina libyca Schwager, 1883, enable the assignment of the Bir Dakhl (D5-40 Section) to the Early Eocene, Ypresian (SBZ10 of Serra- Kiel et al., 1998) supporting an earlier opinion that Assilina placentula belongs to that zone in the calibrated larger foraminiferal biostratigraphic zonation.
英文关键词	foraminifera Assilina evolution Eocene Galala Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000690440500004
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362298
作者单位	[Al Menoufy, Safia] Univ Ain Shams, Fac Educ, Dept Biol & Geol Sci, Cairo 11341, Egypt; [Boukhary, Mohamed] Univ Ain Shams, Fac Sci, Geol Dept, Cairo 11566, Egypt
推荐引用方式 GB/T 7714	Al Menoufy, Safia,Boukhary, Mohamed. On the Validity and Evolution of Assilina Species during the Ypresian-Lutetian: Example from Bir Dakhl, Eastern Desert, Egypt[J],2021,95(4):1080-1085.
APA	Al Menoufy, Safia,&Boukhary, Mohamed.(2021).On the Validity and Evolution of Assilina Species during the Ypresian-Lutetian: Example from Bir Dakhl, Eastern Desert, Egypt.ACTA GEOLOGICA SINICA-ENGLISH EDITION,95(4),1080-1085.
MLA	Al Menoufy, Safia,et al."On the Validity and Evolution of Assilina Species during the Ypresian-Lutetian: Example from Bir Dakhl, Eastern Desert, Egypt".ACTA GEOLOGICA SINICA-ENGLISH EDITION 95.4(2021):1080-1085.