CCPortal
DOI10.1016/j.palaeo.2019.01.028
Exceptional basal-body preservation in some Early Triassic conodont elements from Oman
Souquet L.; Goudemand N.
发表日期2020
ISSN0031-0182
卷号549
英文摘要Conodont elements are composed of two main parts: the crown and the basal body. The basal body of a conodont element is a laminated structure that is less densely mineralized than the crown and, as a result, is rarely preserved. Elements with preserved basal bodies are found only in exceptional cases in the fossil record. To date, no S or M element with preserved basal body has ever been documented for post-Devonian conodonts, which had raised the question of an evolutionary trend towards unmineralized basal bodies in conodonts. Here we report the discovery, in Smithian (Early Triassic) rocks of Oman, of neospathodid conodont elements whose basal body is partly preserved. We demonstrate the presence of basal body in all elements, including S and M elements, of Novispathodus, and most likely of all gondolelloideans, thereby suggesting that the absence of basal bodies in post-Devonian conodonts was due to a preservational bias only. We further demonstrate that the morphology and extent of the basal bodies in Novispathodus are in agreement with previous predictions and do not contradict a cyclostome-like functional model of the apparatus. Based on a review of the occurrences of basal bodies in the literature, we suggest a general pattern for the morphology of the basal bodies in conodont elements that may reflect the mechanical constraints associated with feeding motions. © 2019 Elsevier B.V.
英文关键词Apparatus; Developmental constraints; Evolution; Functional model; Novispathodus; Vertebrate skeleton
语种英语
scopus关键词conodont; Devonian; feeding; feeding behavior; fossil record; mineralization; morphology; preservation; Triassic; Oman; Vertebrata
来源期刊Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/150515
作者单位Univ. Lyon, Ecole Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard Lyon 1, Institut de Génomique Fonctionnelle de Lyon, UMR 5242, 46 Allée d'Italie, Lyon Cedex 07, F-69364, France
推荐引用方式
GB/T 7714
Souquet L.,Goudemand N.. Exceptional basal-body preservation in some Early Triassic conodont elements from Oman[J],2020,549.
APA Souquet L.,&Goudemand N..(2020).Exceptional basal-body preservation in some Early Triassic conodont elements from Oman.Palaeogeography, Palaeoclimatology, Palaeoecology,549.
MLA Souquet L.,et al."Exceptional basal-body preservation in some Early Triassic conodont elements from Oman".Palaeogeography, Palaeoclimatology, Palaeoecology 549(2020).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Souquet L.]的文章
[Goudemand N.]的文章
百度学术
百度学术中相似的文章
[Souquet L.]的文章
[Goudemand N.]的文章
必应学术
必应学术中相似的文章
[Souquet L.]的文章
[Goudemand N.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。