北格陵兰岛(Laurentia)中寒武纪(五流期)的一种priapulate幼虫

IF 1.5 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Bulletin of Geosciences Pub Date : 2022-12-31 DOI:10.3140/bull.geosci.1865

J. S. Peel

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引用次数: 2

摘要

北格陵兰寒武纪中期Henson Gletscher组（庙岭阶，五原阶）的一个磷酸化标本被解释为一种全群普里德虫的孵化幼虫。与所描述的现存尾状普里apulus caudutus和棘背Halicryptus spinulosus的发育相比，一种板状懒猴并不存在，但可能是在幼虫后期发育的。没有发现有鳞的特征性肩胛骨内向，但在现有标本中很可能已被撤回。这一新发现与寒武纪原apulid环神经细胞的个体发育相似，与它们现在的亲属相似。新

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A priapulid larva from the middle Cambrian (Wuliuan Stage) of North Greenland (Laurentia)

A single phosphatised specimen from the middle Cambrian Henson Gletscher Formation (Miaolingian Series, Wuliuan Stage) of North Greenland is interpreted as the hatching larva of a totalgroup priapulid worm. A plated lorica is not present but probably was developed at a later larval stage, by comparison with the described development of extant Priapulus caudatus and Halicryptus spinulosus . A characteristic priapulid introvert with scalids is not seen but it was likely withdrawn in the available specimen. The new find is consistent with a similar ontogeny in Cambrian priapulid cycloneuralians to that seen in their present day relatives. New

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来源期刊

Bulletin of Geosciences 地学-地球科学综合

CiteScore

3.10

自引率

5.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Bulletin of Geosciences is an international journal publishing original research papers, review articles, and short contributions concerning palaeoenvironmental geology, including palaeontology, stratigraphy, sedimentology, palaeogeography, palaeoecology, palaeoclimatology, geochemistry, mineralogy, geophysics, and related fields. All papers are subject to international peer review, and acceptance is based on quality alone.