Barrande标本“未确定囊胚茎”（寒武纪、棘皮动物、Eocrinoidea）的修订

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2017-10-16 DOI:10.4267/2042/62768

Martina Nohejlová, Oldřich Fatka

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引用次数: 0

摘要

对Barrande在1887年描述为“Tige d'une Cystidee indeterminee”的模式标本的重新检查表明，这一独特的标本代表了gogiid eoclinoid Akadocrinus jani Prokop的一个铰结但不完整的遗迹。该标本作为一个外部模子保存在中寒武纪金ince组的页岩中，包括一个茎的近端部分和一个由20多个多边形板组成的膜的稍微断裂的远端部分。除了最基部的板外，其余保存完好的鞘板均有椭球状边缘上盖，这证实了该标本在Akadocrinus个体发育中处于上盖阶段。

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Revision of the Barrande's specimen "Tige d'une Cystidée indéterminée" (Cambrian, Echinodermata, Eocrinoidea)

Reexamination of the type specimen described by Barrande in 1887 as "Tige d'une Cystidee indeterminee" shows that this unique specimen represents an articulated but incomplete remnant of the gogiid eocrinoid Akadocrinus jani Prokop. The specimen is preserved as an external mould in shale from the mid-Cambrian Jince Formation, and comprises a proximal part of a stem associated with a slightly disarticulated distal portion of a theca, composed of over twenty polygonal plates. With the exception of the basal-most plates, all other preserved thecal plates bear ellipsoidal marginal epispires, and substantiate assignment of this specimen to the epispire-bearing phase in ontogenetic development of Akadocrinus.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.