摘要
通过对拉萨地块白垩纪固着蛤进行修订和总结,共识别出7个固着蛤有效种,分别为:Rutonia bangonghuensis Yang et al.,1982,Auroradiolites biconvexus (Yang et al.,1982),Eoradiolites cf. hedini (Douville,1916),Magallanesia rutogensis Rao et al.,2015,Shajia tibetica Rao et al.,2019,Sellaea sp.和 Monopleura sp.。该固着蛤组合的时代为阿普特期(Aptian)晚期至阿尔布期(Albian),与同层产出的圆笠虫组合指示的时代相符。拉萨地块北部郎山组和南缘桑祖岗组所产出固着蛤组合可相互对比。通过对固着蛤组合的分析,饶馨等(Rao et al.,2015,2017,2019a)首次识别出了白垩纪中期亚洲西南部/太平洋生物古地理分区,其固着蛤类群以区域性属Auroradiolites和Horiopleura haydeni–Praecaprotina–Magallanesia演化谱系为特征型分子。
The revision of the rudist taxa previously recorded from the Lhasa Block, allowed the identification of seven valid species in total: Rutonia Bangonghuensis Yang et al., 1982, Auroradiolites biconvexus (Yang et al., 1982), Eoradiolites cf. hedini (Douvillé, 1916), Magallanesia rutogensis Rao et al., 2015, Shajia tibetica Rao et al., 2019, Sellaea sp. and Monopleura sp. The age of this rudist assemblage is Late Aptian to Albian, which was confirmed by the orbitolinid records from the Lhasa Block. The rudist biostratigraphic correlation between Sangzugang Formation and Langshan Formation indicates that the rudist assemblages of these two formations are comparable. The mid-Cretaceous SW Asian/Pacific province was recognized by Rao et al.(2015, 2017, 2019a) based on the occurrence of endemic rudist taxa Auroradiolites and the accompanying polyconitid lineage, Horiopleura haydeni–Praecaprotina–Magallanesia.
作者
饶馨
彭博
蔡华伟
RAO Xin;PENG Bo;CAI Hua-wei(State Key laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontologyy Chinese Academy of Sciences ,Nanjing 210008, China;Nanjing Center, China Geological Survey, Nanjing 210016, China)
出处
《古生物学报》
CSCD
北大核心
2019年第3期363-371,共9页
Acta Palaeontologica Sinica
基金
国家自然科学基金(41702014)
中国科学院战略性先导科技专项B类(XDB26010206)
第二次青藏高原科学考察项目(2019QZKK0706)
现代古生物学和地层学国家重点实验室基金(20162110)联合资助
