Redescription of the type specimens for the Late Jurassic rhynchocephalian Opisthias rarus and a new specimen of Theretairus antiquus from Quarry 9, Morrison Formation, Wyoming, USA

IF 1.8 3区地球科学 Q2 PALEONTOLOGY

Acta Palaeontologica Polonica Pub Date : 2022-01-01 DOI:10.4202/app.00929.2021

Jorge A. Herrera‐Flores, Thomas L. Stubbs, F. Sour-Tovar

引用次数: 0

Abstract

We reexamine and redescribe the type specimens and other associated material of the Late Jurassic rhynchocephalian Opisthias rarus, from Quarry 9 of the Morrison Formation. We rediscover and describe a fragment of rock matrix belonging to the holotype that is presented for the first time, and we also comment on undescribed material from Quarry 9 that possibly belongs to an unnamed species of Opisthias. In addition, we describe a new specimen of Theretairus antiquus that helps to reject its proposed status as a junior synonym of O. rarus, and contributes to increase the knowledge of the microvertebrate fauna of the Late Jurassic of North America.

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美国怀俄明州Morrison组9号采石场晚侏罗世颈头类Opisthias rarus模式标本的重新描述及一种新种Theretairus antius

本文对莫里森组9号采石场的晚侏罗世颈头类稀有蛇目(Opisthias rarus)的模式标本和其他相关材料进行了重新研究和描述。我们重新发现并描述了第一次出现的属于完整模式的岩石基质碎片，并对9号采石场中可能属于未命名的Opisthias物种的未描述材料进行了评论。此外，我们描述了一个新的Theretairus antiquus标本，有助于否定其作为O. rarus的初级同义词的地位，并有助于增加对北美晚侏罗世微脊椎动物区系的认识。

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

Acta Palaeontologica Polonica 地学-古生物学

CiteScore

2.80

自引率

5.60%

发文量

审稿时长

12.5 months

期刊介绍： Acta Palaeontologica Polonica is an international quarterly journal publishing papers of general interest from all areas of paleontology. Since its founding by Roman Kozłowski in 1956, various currents of modern paleontology have been represented in the contents of the journal, especially those rooted in biologically oriented paleontology, an area he helped establish. In-depth studies of all kinds of fossils, of the mode of life of ancient organisms and structure of their skeletons are welcome, as those offering stratigraphically ordered evidence of evolution. Work on vertebrates and applications of fossil evidence to developmental studies, both ontogeny and astogeny of clonal organisms, have a long tradition in our journal. Evolution of the biosphere and its ecosystems, as inferred from geochemical evidence, has also been the focus of studies published in the journal.