Discovery of Middle Triassic Conodont Clusters from Luoping Fauna, Yunnan Province
-
摘要: 通过对云南罗平中三叠统关岭组二段产罗平生物群的大凹子剖面进行厘米级牙形石样品的精细采样、处理与鉴定分析, 发现了丰富的牙形石齿串, 并拼绘出一个较完整的牙形石多分子器官属(P1、S0、S1、S2/3和M).成对的片形Neospathodiform形态分子占据P1位置; 单个指掌状的Cypridodelliform形态分子占据S0位置; 成对的Enantiognathiform、Hindeodelliform与Cypridodelliform形态分子分别占据器官属的S1、S2、S3和M位置.Abstract: Abundant conodont clusters were found after careful sampling, processing and analysis of the specimens in the Daaozi section of the second member of Guanling Formation yielding Luoping Fauna at the centimeter level. And a complete conodont multielement apparatus (P1, S0, S1, S2/3, M) was shown to us by fine identification and detailed analysis, including one pair of P1 elements (Neospathodiform), one S0 element (Cypridodelliform), pairs of S1 (Enantiognathiform), S2/S3 (Hindeodelliform), and M elements (Cypridodelliform).
-
Key words:
- the second member of Guanling Formation /
- Daaozi section /
- conodont clusters /
- stratigraphy /
- Yunnan
-
图 1 云南罗平大凹子剖面交通位置
Fig. 1. Location map of Daaozi section in Luoping area, Yunnan Province
图 2 大凹子剖面的牙形石齿串
图中A-C牙形石标本均放大100倍(除B1放大400倍外，B1为B的局部放大图，显示有清晰的沿齿纵向分布条纹，齿体边缘有磨蚀的痕迹).A-C为大凹子剖面规则排列的牙形石齿串组合；B为两个P1分子齿串；A、C齿串分子含有相同的组合型式，除S0分子由一个Cypridodelliform形态分子组成外，其余S1(Enantiognathiform)、S2/3(Hindeodelliform)、M(Cypridodelliform)形态分子构成都是成对的.牙形石齿串产出的层位分别是：A-第18层，B-第19层，C-第25层
Fig. 2. Conodont clusters in Daaozi section
-
Goudemand, N., Orchard, M., Tafforeau, P., et al., 2009. Early Triassic conodont clusters from South China: revision of the architecture of the 15-element apparatuses of the Gondolelloidea superfamily. Permophiles(ICOS abstracts), 53(Suppl. 1): 16-17. Huang, J.Y., Zhang, K.X., Zhang, Q.Y., et al., 2009. Conodonts stratigraphy and sedimentary environment of the Midddle Triassic at Daaozi section of Luoping county, Yunnan Province, South China. Acta Micropalaeontologica Sinica, 26(3): 211-224 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-WSGT200903002.htm Jiang, H.S., Luo, G.M., Lai, X.L., 2004. Summary of approaches for conodont separation. Geological Science and Technology Information, 23(4): 109-112 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTotal-DZKQ200404021.htm Lai, X.L., 1995. New advances in affinity of conodonts—the earliest vertebrates. Geological Science and Technology Information, 14(4): 49-56 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZKQ504.011.htm Purnell, M.A., Donoghue, P.C.J., 1997. Architecture and functional morphology of the skeletal apparatus of ozarkodinid conodonts. Phil. Trans. Roy. Soc. Lond. B, 352: 1545-1564. doi: 10.1098/rstb.1997.0141 Ramovš, A., 1978. Mitteltriassische conodonten-clusters in Slovenien, NW Jugoslawien. Paläont. Z., 52(1-2): 129-137. doi: 10.1007/BF03006734 Rieber, H., 1980. Ein conodonten-cluster aus der Grenzbitumenzone (Mittlere Trias) des Monte San Giorgio (Kt. Tessin/Schweiz). Ann. Naturhist. Mus. Wien, 83: 265-274. http://www.onacademic.com/detail/journal_1000038519716610_0bf3.html Wang, C.Y., 1987. Conodont. Science Press, Beijing (in Chinese). 黄金元, 张克信, 张启跃, 等, 2009. 云南罗平中三叠世大凹子剖面牙形石生物地层及其沉积环境研究. 微体古生物学报, 26(3): 211-224. doi: 10.3969/j.issn.1000-0674.2009.03.002 江海水, 罗根明, 赖旭龙, 2004. 牙形石的分离方法简介. 地质科技情报, 23(4): 109-112. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ200404021.htm 赖旭龙, 1995. 牙形石动物分类归属研究新进展——牙形石是最早的脊椎动物. 地质科技情报, 14(4): 49-56. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ504.011.htm 王成源, 1987. 牙形刺. 北京: 科学出版社. -
下载:
点击查看大图
图(2)
计量
- 文章访问数: 3299
- HTML全文浏览量: 318
- PDF下载量: 74
- 被引次数: 0
