俄克拉何马州寒武纪江山期三叶虫新动物群及其生物地层意义。

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Journal of Paleontology Pub Date : 2023-07-13 DOI:10.1017/jpa.2023.40

Sean R. Blackwell, S. Westrop

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引用次数: 0

摘要

新发现的寒武纪蜜溪组三叶虫动物群标志着灭绝事件之后的一个明显间隔。它以Monocheilus属为主，与Ptychaspis有联系，类似于加拿大阿尔伯塔省和美国密西西比河上游河谷地区的动物群。Ptychaspis bullasa Lochman and Hu, 1959是在北美广泛报道的一种。然而，对各种博物馆藏品的重新研究表明，这些不同的事件记录了一组分布更窄的物种。分布模式类似于通过遗传和解剖数据相结合确定的现代“伪隐种”群。

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A new Cambrian (Jiangshanian, Sunwaptan) trilobite fauna from Oklahoma and its biostratigraphic significance.

A newly discovered trilobite fauna from the Cambrian Honey Creek Formation marks a distinct interval that follows an extinction event. Dominated by the genus Monocheilus in association with Ptychaspis, it resembles faunas from Alberta, Canada, and the Upper Mississippi Valley region of the United States. Ptychaspis bullasa Lochman and Hu, 1959 is a species that has been reported widely in North America. However, restudy of various museum collections shows that the various occurrences record a set of more narrowly distributed species. The pattern of distribution is similar to groups of modern “pseudocryptic species” identified by a combination of genetic and anatomical data.

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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.