Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China
Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China
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DOI：
10.4202/app.2011.0028
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发表时间：
2012-06-01
影响因子：
1.8
通讯作者：
Butterfield, Nicholas J.
中科院分区：
文献类型：
--
作者：
Harvey, Thomas H. P.;Ortega-Hernandez, Javier;Butterfield, Nicholas J.
报道了贵州凯里组中寒武纪基底段(贵州中国)的各种碳质微体化石，包括保存完好的非生物矿化后生动物遗骸。温和的酸浸渍技术的应用补充了以前的孢粉学研究，揭示了更大尺寸类的丝状微化石、更丰富的丝状微化石组合和以前未恢复的各种形式。后生动物化石包括维瓦夏片岩和来自生物矿化分类群的元素，包括软骨藻类、腕足类和Hyolithids，与以前研究的加拿大早寒武世和中寒武世的组合相同。此外，凯里组还发现了翼状突起遗骸和一组角质层碎片，这些角质层碎片代表了“软体”蠕虫，包括一种类似于无节肢动物的鳞翅目蠕虫。我们的结果证明了微观的“伯吉斯页岩型”化石的广泛分布和古生物学意义，并为这种在很大程度上尚未开发的保存模式的局限性和潜力提供了洞察
Diverse carbonaceous microfossils, including exceptionally preserved remains of non-biomineralizing metazoans, are reported from a basal middle Cambrian interval of the Kaili Formation (Guizhou Province, China). The application of a gentle acid maceration technique complements previous palynological studies by revealing a larger size-class of acritarchs, a richer assemblage of filamentous microfossils, and a variety of previously unrecovered forms. Metazoan fossils include Wiwaxia sclerites and elements derived from biomineralizing taxa, including chancelloriids, brachiopods and hyolithids, in common with previously studied assemblages from the early and middle Cambrian of Canada. In addition, the Kaili Formation has yielded pterobranch remains and an assemblage of cuticle fragments representing "soft-bodied" worms, including a priapulid-like scalidophoran. Our results demonstrate the wide distribution and palaeobiological importance of microscopic "Burgess Shale-type" fossils, and provide insights into the limitations and potential of this largely untapped preservational mode