中泥盆世艾菲利亚鹦鹉螺类头足亚鹦鹉螺(鹦鹉螺亚目)比利时首次记录

IF 1.2 4区 地球科学 Q2 GEOLOGY
Stijn Goolaerts
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引用次数: 0

摘要

在比利时下、中泥盆世沉积岩中,氨类头足类极为罕见,这与邻近的沉积盆地形成鲜明对比。然而,对旧的收集和最近的收集工作的研究表明,在比利时的这些床层中确实存在氨石,这可以扩大我们对下泥盆世和中泥盆世氨石的认识。本文首次以比利时Jemelle组(chavemes Member)的标本为基础,描述了Eifelian(中泥盆世)anarcestid菊类属Subanarcestes的记录。这个标本是一个多世纪前由eug Maillieux在Couvin附近的Trou Bodet收集的。在比利时皇家自然科学研究所的收藏中,它被认为是一种菊形头足类动物,几十年来一直没有被人认识,而之前被认为是Cryptoceras或“鹦鹉螺”化石,如果正确的话,它是比利时最古老的鹦鹉螺化石。显微ct成像对标本的分类鉴定有很大帮助。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the first Belgian record of the Eifelian (Middle Devonian) ammonoid cephalopod Subanarcestes (Suborder Anarcestina)
Ammonoid cephalopods are extremely rare in the Lower and Middle Devonian sedimentary rocks of Belgium, which contrasts with the neighboring sedimentary basins. However, searches in old collections and recent collecting efforts show that ammonoids do occur in these beds in Belgium, which allows to enlarge our knowledge of Lower and Middle Devonian ammonoid occurrences. Here, a record of the Eifelian (Middle Devonian) anarcestid ammonoid genus Subanarcestes is described for the first time from Belgium based on a specimen from the Jemelle Formation (Chavées Member). This specimen was collected more than a century ago by Eugène Maillieux at Trou Bodet near Couvin. It laid unrecognized as an ammonoid cephalopod for many decades in the collections of the Royal Belgian Institute of Natural Sciences, while being previously identified as Cryptoceras or ‘Nautilus’ fossil, which if correct, constituted Belgium’s oldest Nautilida fossil. Micro-CT imaging greatly helped in the taxonomic assignment of the specimen.
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来源期刊
Geologica Belgica
Geologica Belgica 地学-地质学
CiteScore
4.70
自引率
27.80%
发文量
8
审稿时长
>12 weeks
期刊介绍: Geologica Belgica is a Belgian journal that welcomes papers concerning all aspects of the earth sciences, with a particular emphasis on the regional geology of Belgium, North West Europe and central Africa. Papers not dedicated to the geology of Belgium, North West Europe and central Africa are only accepted when one of the authors is linked to a Belgian University or Institution. Thematic issues are highly appreciated. In this case, guest editors take in charge the selection of the manuscripts and the subject of the papers can be enlarged. The journal is in open access. Submitted manuscripts should be concise, presenting material not previously published. The journal also encourages the publication of papers from Belgian junior authors. Short letters are accepted. Papers written in English are preferred. Each mansucript will be reviewed by at least two reviewers.
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