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陕西镇巴梁家桥奥陶系含有比较丰富的微古植物。在下一中奥陶统西梁寺组下部的深灰色白云质砂岩中,发现微古植物17个属,46个种;在上奥陶统涧草沟组黄绿色页岩中,发现微古植物15个属,28个种。为该地区奥陶系地层的划分提供了又一个方面的生物依据,同时也为我国目前研究程度还比较低的早古生代微古植物增添了新资料。本文中描述了三个新种:Micrhystridium ciliforme sp.nov.,Buedingiisphaeridiumhumifusum sp.nov.Multiplicisphaeridium robustum sp.nov.
Shaanxi Province, Bailiangjiaqiao Ordovician contains rich micro-ancient plants. In the next middle Ordovician Xilisi Formation in the lower part of the dark gray dolomitic sandstone, found in 17 genera and 46 species of microfacies; in the Upper Ordovician jiancaogou yellow green shale, found that the ancient plants 15 genera and 28 species. It provides another biological basis for the division of Ordovician strata in the area and also adds new information to the paleo-ancient Paleozoic plants that are still under-researched in our country at present. Three new species are described herein: Micrhystridium ciliforme sp. Nov., Buedingiisphaeridium humifusum sp. Nov. Multiplicisphaeridium robustum sp. Nov.