What's behind a name: The taxonomic status of Helicancylus Gabb, 1869 and Hamiticeras Anderson, 1938 (Ammonoidea, Lower Cretaceous)

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Journal of Paleontology Pub Date : 2023-04-12 DOI:10.1017/jpa.2023.15

C. Frau, L. Bulot

引用次数: 0

Abstract

Abstract. The present contribution illustrates the type material of the Lower Cretaceous ammonoids Ptychoceras aequicostatus Gabb, 1864 (type species of Helicancylus Gabb, 1869) and Hamiticeras pilsbryi Anderson, 1938 (type species of Hamiticeras Anderson, 1938). The typification and taxonomic validity of both genera are clarified, and the affinities with coeval Acrioceratidae are discussed. Their stratigraphic range is investigated with implications for correlation between northern Pacific and European ammonoid scales.

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名称背后的内容：Helicancylus Gabb的分类地位，1869年和Hamiticeras Anderson，1938年（菊科，下白垩纪）

摘要本贡献说明了下白垩纪菊石Ptychoceras aequicostatus Gabb，1864（Helicancylus Gabb的模式种，1869）和Hamiticeras pilsbryi Anderson，1938（Hamiticeras-Anderson的模式种）的模式物质。阐明了这两个属的类型和分类有效性，并讨论了它们与同时代的蝗科的亲缘关系。研究了它们的地层范围，对北太平洋和欧洲菊石规模之间的对比具有启示意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Paleontology 地学-古生物学

CiteScore

2.80

自引率

7.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Paleontology publishes original articles and notes on the systematics, phylogeny, paleoecology, paleogeography, and evolution of fossil organisms. It emphasizes specimen-based research and features high quality illustrations. All taxonomic groups are treated, including invertebrates, microfossils, plants, vertebrates, and ichnofossils.