斯瓦尔巴斯匹次卑尔根Givetian的一个新的放线菌Cheirolepis jonesi nov.sp

IF 0.8 4区地球科学 Q2 Earth and Planetary Sciences

Norwegian Journal of Geology Pub Date : 2021-04-26 DOI:10.17850/NJG101-1-3

M. Newman, C. Burrow, J. Blaauwen, Sam Giles

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引用次数: 4

摘要

©版权归作者所有。本作品获得知识共享署名4.0国际许可。从中泥盆纪（Givetian）Fiskekløfta泻湖段采集了两个新的早期放线菌Cheirolepis jonesi nov.gen.et sp.的标本，该泻湖段是Spitsbergen Mimerdalen亚群Tordalen组的上部成员。这是已知的第二古老的Cheirolepis物种。正模由关节连接的头部和前躯干部组成。另一个标本是一个关节头骨，通过3D扫描确定其内部结构和一般结构。新分类单元与其他Cheirolepis物种的不同之处在于头部骨骼的相对尺寸，包括狭窄的齿前端、较长的副盖和相应较短的皮颚，以及较长的前颌骨和相应较大的颈方，以及牙齿的组织和相对大小。

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A new actinopterygian Cheirolepis jonesi nov. sp. from the Givetian of Spitsbergen, Svalbard

© Copyright the authors. This work is licensed under a Creative Commons Attribution 4.0 International License. Two specimens of a new early actinopterygian Cheirolepis jonesi nov. gen. et sp. have been collected from the lagoonal Middle Devonian (Givetian) Fiskekløfta Member, the upper member of the Tordalen Formation in the Mimerdalen Subgroup of Spitsbergen. This is the second oldest Cheirolepis species known from articulated remains. The holotype consists of an articulated head and the anterior trunk. The other specimen is an articulated skull which was 3D scanned to determine the internal structure and general architecture. The new taxon differs from other Cheirolepis species in the relative dimensions of the bones of the head, including a narrow anterior end of the dentary, longer accessory operculum and correspondingly shorter dermohyal, as well as a longer premaxilla and proportionally larger quadratojugal, and the organisation and relative size of the teeth.

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来源期刊

Norwegian Journal of Geology 地学-地球科学综合

CiteScore

1.60

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Norwegian Journal of Geology publishes high-quality, fully peer-review papers from all geoscientific disciplines. Papers are commonly based on regional studies and should emphasise the development of understanding of fundamental geological processes. More specialised papers can also be submitted, but should be written in a way that is easily understood by nonspecialists, and illustrate the progress being made within that specific topic in geosciences. We also encourage initiatives for thematic issues within the scope of the Journal.