不列颠群岛 Acanthohoplitinae 亚科的新成员,包括 Acanthohoplites(下白垩统,上古宙)的首次可核实记录

IF 1.9 3区 地球科学 Q1 GEOLOGY
Jens Lehmann , H. Mark Bayliss
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引用次数: 0

摘要

Acanthohoplites aschiltaensis 是一种原产于达吉斯坦高加索地区的始新世晚期鹦鹉螺,这是首次在不列颠群岛发现该物种。由于保存了以前不为人知的成熟体腔,因此能够对该物种的整个个体发育过程进行研究。在地层学上,它证实了牛津郡 Baulking 的 Parahoplites nutfieldiensis 区内的富勒土沉积与该类型地点和其他地方的 Parahoplites melchioris 区地层的相关性。从古生物地理学的角度来看,它强调了西欧的北方动物群与地中海-高加索亚界的哲罗纪动物群之间的密切关系。此外,在怀特岛 Shanklin 地区出露的安普顿/安息年边界区间的 Hypcanthoplites jacobi 区的 H. rubricosus 亚区,描述了一个小型 Hypacanthoplites spp.动物群。在这个几乎没有氨虫遗迹的地方,我们发现了保存相当完好的 "Hypacanthoplites "elegans、H. plesiotypicus、H. pricei、H. tenuiformis、H. rubricosus、H. sigmoidalis 和 H. sp.除了之前在不列颠群岛描述过的该属的其他成员外,'H. elegans'和 H. plesiotypicus 的出现进一步证实了欧洲大陆东部存在狭窄的海域联系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Additions to the subfamily Acanthohoplitinae from the British Isles, including the first verifiable record of Acanthohoplites (Lower Cretaceous, upper Aptian)

Acanthohoplites aschiltaensis, a late Aptian ammonite originally described from the Caucasus of Dagestan, is recognised from the British Isles for the first time. A study of the full ontogenetic development of this species is enabled owing to the preservation of a mature body-chamber, not previously known. Stratigraphically, it confirms the correlation of the Fullers' Earth deposits within the Parahoplites nutfieldiensis Zone at Baulking, Oxfordshire, with strata of the Parahoplites melchioris Zone at the type locality and elsewhere. Palaeobiogeographically, it underlines the strong relationship between the Boreal fauna of western Europe and that of the Mediterranean-Caucasian Subrealm of the Tethyan realm. Additionally, a small Hypacanthoplites spp. fauna is described from the H. rubricosus Subzone of the Hypcanthoplites jacobi Zone at the Aptian/Albian boundary interval exposed in the Shanklin area, Isle of Wight. From this locality, otherwise almost devoid of ammonite remains, we present fairly well-preserved specimens of ‘Hypacanthoplites’ elegans, H. plesiotypicus, H. pricei, H. tenuiformis, H. rubricosus, H. sigmoidalis and H. sp. 1 indet., only known thanks to some decades of intensive collecting. In addition to the other members of this genus previously described from the British Isles, the occurrence of ‘H.’ elegans and H. plesiotypicus further supports the existence of narrow sea connections eastwards onto the European continent.

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来源期刊
Cretaceous Research
Cretaceous Research 地学-地质学
CiteScore
4.10
自引率
19.00%
发文量
235
审稿时长
12 weeks
期刊介绍: Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings. Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale. Research Areas include: • Regional geology • Stratigraphy and palaeontology • Palaeobiology • Palaeobiogeography • Palaeoceanography • Palaeoclimatology • Evolutionary Palaeoecology • Geochronology • Global events.
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