Lineage of Arxina schwageri (Silvestri, 1928) new genus (Nummulitacea) from Middle Eocene of Egypt and Sultanate of Oman

被引：6
|
作者：
Boukhary, Mohamed [1 ]
Hussein, Aly I. M. [1 ]
Al-Sayigh, Abdul Razak [2 ]
机构：
[1] Ain Shams Univ, Fac Sci, Dept Geol, Cairo, Egypt
[2] Sultan Qaboos Univ, Coll Sci, Dept Earth Sci, Al Khoud, Oman
来源：
HISTORICAL BIOLOGY | 2012年 / 24卷 / 05期
关键词：
Nummulitidae; phylogenetic trends; Middle Eocene; Egypt; Sultanate of Oman;
D O I：
10.1080/08912963.2011.651468
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Four species, Arxina parva (Douville, 1930), Arxina cf. schwageri (Silvestri, 1928) A. schwageri (Silvestri, 1928) and Arxina sp. cf. alpina (Douville, 1916) assigned to the newly erected genus Arxina, are recorded from the Middle Eocene of Egypt and Sultanate of Oman. The phylogenetic trend of these species exhibits a progressive increase in the size, a flattening of the test and a general trend of the coalescence of granules which become smaller in size.
引用
收藏
页码：547 / 556
页数：10
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