沟鞭藻Horologinella Cookson and Eisenackl962的形态学和分类学
摘要
Horologinella属最初的定义包含小个体的和具特有的滴漏器形的微体化石。归到该届的不同类型可分成形态构造不同的两类:具板式和非板式类型,进一步证实了在Horologinella属的分类上颇混乱的情形。在本组合中,具板式类型极少见,与这类孢粉类型有关的形态学、地层分布及古环境特征的资料非常少见。文中描述了中西伯利亚北部阿纳巴尔湾早白垩世的H.anabarensis Pestchevitskaya的许多保存良好的标本,利用这些保存良好的标本可以研究Horologinella类型的详细板式形态。前、后腰区和顶区的反映板式及第一块顶板片的对应位置和反映纵沟的构造,说明Horologinella具板式的类型与膝沟藻目的沟鞭膜囊孢,尤其是与瑞提膝沟藻亚日的分子有限密切的关系。古生物学和孢粉学的资料显示H.anabarensis和有利于微体浮游植物组合发育的浅海环境有关。
出处
《古生物学报》
CSCD
北大核心
2003年第1期45-55,共11页
Acta Palaeontologica Sinica
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