1)  conodont fauna
牙形石群
1.
This conodont fauna consists mainly of Paragondolella polygnathiformis, P.
牙形石群主要由Paragondolella polygnathiformis, P。
2)  tooth precision
牙形精度
3)  upper incisor form
切牙形
4)  conodonts
牙形石
1.
Geochemical characteristics of paleoseawater from the Early Ordovician of Yangtze Craton: Evidence from the trace elements in conodonts;
扬子克拉通早奥陶世古海水地球化学特征:来自牙形石微量元素的证据
2.
Based on the study about silurian conodonts in the northern section of Longmen Mountain,4 conodont zones,including 6 subzones,were built in this area for the first time.
作者通过对龙门山北段志留纪牙形石的研究,首次建立了本区的牙形石带四个,亚带六个,自下而上为Spathognathodus obesus带,包括上、下两个亚带A和B;Spathognathodus parahassi—P。
3.
During 1∶50000 regional geological and mineral survey,some conodonts fossils such as of Streptognathodus suberectus,Idiognathoides sinuate et al.
1∶5万区域地质矿产调查于东天山库姆塔格沙垄地区康古尔塔格深大断裂北侧灰岩中,发现了Streptognathodus suberectus,Idiognathoides sinuata等牙形石,确认其地质时代为晚石炭世达拉阶,该套地层归属哈尔里克地层小区底坎儿组,具有弧后盆地建造特色。
5)  conodont
牙形石
1.
Triassic conodont biostratigraphy in the Coqên area, western Gangdise, Tibet, China;
西藏冈底斯西段措勤地区三叠纪牙形石生物地层特征
2.
Discovery of Permian and Triassic conodonts in the Shiquanhe area, Ngari, western Tibet, Chian and their significances;
西藏西部狮泉河地区二叠纪和三叠纪牙形石的发现及其意义
3.
The Late Carboniferous conodont Neognathodus fauna in Xainza,Tibet,China,and its significance.;
西藏申扎地区晚石炭世牙形石Neognathodus动物群的特征及其意义
6)  conodont
牙形刺
1.
New material of Carboniferous conodonts from Lubanshi ,Lixian,West Qinling;
西秦岭礼县鲁班石一带石炭纪牙形刺新资料
2.
The conodonts of Late Permian Dalong Formation in Central-Southern Hunan and their stratigraphic significance;
湘中南区晚二叠世大隆组牙形刺及其地层意义
3.
Previous research on Chinese Lower Devonian conodonts Lower Devonian conodonts in China were first reported in 1975 by Wang C.
经多年研究,特别是李文国等(1985)的研究,使本区珊瑚、腕足类、层孔虫、鹦鹉螺等大化石的研究工作已有一定基础,并依据牙形刺首先确定了在阿鲁共剖面有泥盆纪地层的存在。
参考词条
补充资料:牙形石
牙形石
conodonts
    具有各种各样尖齿或锯齿状物的古代动物遗体,微体古生物学的重要研究内容之一。牙形石个体很小,从不足0.1毫米到约4毫米。未经变质的牙形石一般呈琥珀光泽,浅褐黄、灰白色,透明或不透明。其主要化学成分是磷酸钙,由磷灰石类矿物呈纤维状或薄片状排列而成。牙形石的生物分类位置至今仍未确定。牙形石分布甚广,但仅限于海相沉积物。从寒武纪开始出现,以后几经盛衰,绝灭于三叠纪。牙形石演化十分迅速,为标准化石,用于地层的划分和对比,尤其是井下地层的划分对比起着重要的作用。
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