Early Permian brachiopods of Gondwana affinity from the Dingjiazhai Formation of the Baoshan Block, western Yunnan, China
Early Permian brachiopods of Gondwana affinity from the Dingjiazhai Formation of the Baoshan Block, western Yunnan, China
复制标题
DOI：
10.13130/2039-4942/6146
复制
发表时间：
2000-11
影响因子：
2.3
通讯作者：
S. Shen;G. Shi;Kuiyu Zhu
中科院分区：
文献类型：
--
作者：
S. Shen;G. Shi;Kuiyu Zhu
本文报道了滇西保山地块顶尖寨组12个孤立地点的28种化石，隶属26属，2个未定属。本文报道了四新种：黑水沟产板蛛Bandoproductus qigshuigouensis n.例如，东山坡厚壳蟹N.例如，三角跳甲sp.和Punctoatellella？云南种例如，描述了根据丁家寨组腕足动物的地层分布，可识别出3个组合，自下而上依次为Bandoproductus qingshuogouensis-Marginifera semigratiosa组合（Asselian时代）、Punctoproductella australis-Punctoprodufer afghanus组合（最可能是Asselian晚期-Sakmarian早期）和Callythaplla dongshanpoensis组合（Sakmarian-Artinskian晚期）。丁家寨早二叠世腕足动物群整体上与冈瓦纳、近缘瓦纳动物群有较强的属种联系，但与东部古特提斯动物群也有有限但重要的联系。
Twenty eight species belonging to twenty six genera and two unidentifiable genera are reported and figured from twelve isolated localities of the Dingjianzhai Formation in the Baoshan Block, western Yunnan, China. Four new species, Bandoproductus qigshuigouensis n. sp., Callytharrella dongshanpoensis n. sp., Trigonotreta semicircularis n. sp. and Punctocyrtella ? yunnanensis n. sp., are described. Based on the stratigraphic distribution of the brachiopod species throughout the Dingjiazhai Formation, three assemblages are recognizable, which in ascending order are: Bandoproductus qingshuigouensis- Marginifera semigratiosa Assemblage (Asselian age), Punctocyrtella australis-Punctospirifer afghanus Assemblage (most likely latest Asselian-Early Sakmarian) and Callytharrella dongshanpoensis Assemblage (Late Sakmarian-Artinskian). The Early Permian Dingjiazhai brachiopod fauna as a whole demonstrates strong generic and specific links with those of Gondwanan and Perigondwanan faunas, but also demonstrates limited but significant links with those of the eastern Palaeotethyan faunas.