Small carbonaceous fossils (SCFs): A new measure of early Paleozoic paleobiology
Small carbonaceous fossils (SCFs): A new measure of early Paleozoic paleobiology
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DOI：
10.1130/g32580.1
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发表时间：
2012-01-01
期刊：
影响因子：
5.8
通讯作者：
Harvey, T. H. P.
中科院分区：
文献类型：
--
作者：
Butterfield, N. J.;Harvey, T. H. P.
使用低操作氢氟酸提取程序的寒武纪泥岩揭示了一个意想不到的丰富和多样的小碳质化石（SCF），主要是动物的脱节骨片和表皮碎片。相对不规则的形式，如Wiwaxia骨片和priapulid样的鳞片是足够常见的，以产生一个合理可靠的生物地层学信号，不像他们罕见的宏观同行。软体动物齿舌，甲壳动物的附属物，和最初矿化后生动物骨片的碳质成分提供了进一步的见解，早期后生动物的组织学，多样性和分布。SCFs的广泛存在部分是由于其增强的生物地层学潜力的运输，埋葬和保存，特别是在良好的通气epicratonic设置不代表伯吉斯页岩型宏化石。更一般地说，SCF记录代表了通过早古生代的生态和进化动力学的一个很大程度上未开发的措施。
Use of a low-manipulation hydrofluoric acid-extraction procedure on Cambrian mudstones reveals an unexpectedly abundant and diverse range of small carbonaceous fossils (SCFs), primarily the disarticulated sclerites and cuticular fragments of animals. Relatively recalcitrant forms such as Wiwaxia sclerites and priapulid-like scalids are sufficiently common to yield a reasonably reliable biostratigraphic signal, unlike their rare macroscopic counterparts. Molluscan radulae, crustacean appendages, and the carbonaceous components of originally mineralized metazoan sclerites provide further insights into the histology, diversity, and distribution of early metazoans. The widespread occurrence of SCFs is due in part to their enhanced biostratinomic potential for transport, burial, and preservation, particularly in well-aerated epicratonic settings not represented by Burgess Shale-type macrofossils. More generally, the SCF record represents a largely untapped measure of ecological and evolutionary dynamics through the early Paleozoic.