摘要
本文记述了巴彦浩特盆地及其边缘地区侏罗纪和早白垩世轮藻化石7属1亚属20种2相似种2未定种和1型,其中包括1新属4新种1新名和1新型。侏罗纪轮藻化石属种较单调,反映的地质时代为中、晚侏罗世。早白恶世轮藻类属种丰富,代表分子为Flabellochara hebeiensis和Atopochara trivolvis triquetra,时代为早白垩世晚巴列姆期。
The fossil charophytes (7 genera, 1 subgenus, 20 species, 2 species conformis, 2 speciesindeterminate and 1 form, including 1 new genus, 4 new species, 1 nomen novum and 1 newform) described in this paper were collected from the Bayanhot Basin situated in AlxaZuoqi (long. 103°--106°E and lat. 38°--39°40′N), and its neighbourhood. They areLower-Middle Jurassic in age. The main species are Aclistochara abshirica. A. yunnanensis, A. major and A. nuguishanensis. The Upper Jurassic Fenfanghe Formation yielded only Aclistochara sublaevis and A.bransoni. Rich fossil charophytes assigned to the Atopochara trivolvis triquetra-Flabellocharahebeiensis Zone of Late Barremian in age are found in the Lower Cretaceous Bayanhot andMiaoshanhu Formations in the Basin and on the eastern edge of the basin. Neimongo-lichara bayanhotensis gen. et sp. nov. from the upper part of the Miaoshanhu Formation, isornamented with regular tubercula, with apical nodes erect and closely joining together.The origin of the genus and species still remains unclear.
出处
《微体古生物学报》
CSCD
北大核心
1991年第4期373-394,489-492,共22页
Acta Micropalaeontologica Sinica
关键词
轮藻类
侏罗纪
早白垩世
Jurassic
Late Barremian ages
charophytes
Bayanhot Basin
