巴西帕拉纳盆地Teresina组二叠系混盐介形类组合

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2022-04-12 DOI:10.4072/rbp.2022.1.02

C. T. Bergue, M. Maranhão, Christiano Ng, M. Naumcheva

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引用次数: 1

摘要

在巴西西南部圣保罗州的两个地方：Xavante Dam和Pau Preto Quarry，巴拉那盆地Teresina组的中上二叠纪（Guadalupian）岩石中描述了新的介形虫物种。本文描述了Paranacythere nigripalus gen.nov.和sp.nov.、Velatomorpha xavante sp.nov..和Velatomorphia pseudoaltilis sp.novs。Velatomorpha–Paranacythere组合被认为是Teresina组二叠纪混合含盐环境的典型组合，在两个研究区域中最为丰富。Paranacythere nigripalus gen.nov.和sp.nov.被认为是一个非常丰富的物种，具有典型的Cytheruridae特征，并初步归属于Cytherurida科。根据介形虫种群的年龄结构、生物地层学和组合的分类组成，提出了一些生态学观点。对泰伯特和杜威的Velatomorpha的诊断进行了修正。关键词：演化；边缘海洋环境；古生态学；Teresina组；分类学。

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A Permian mixohaline ostracod association of the Teresina Formation, Paraná Basin, Brazil

New ostracod species are described for Middle to Upper Permian (Guadalupian) rocks of the Teresina Formation, Paraná Basin, from two localities in the São Paulo State, southwestern Brazil: Xavante Dam and Pau Preto Quarry. Paranacythere nigripallus gen. nov. and sp. nov., Velatomorpha xavante sp. nov., and Velatomorpha pseudoaltilis sp. nov. are herein described. The association Velatomorpha–Paranacythere is proposed as typical of Permian mixohaline environments of the Teresina Formation, and is the most abundant in the two studied localities. Paranacythere nigripallus gen. nov. and sp. nov. is proposed to accommodate a very abundant species with typically cytheroidean characteristics, and tentatively ascribed to the family Cytheruridae. Some ecological remarks are presented based on ostracod population age structure, biostratinomy and taxonomic composition of assemblages. The diagnosis of Velatomorpha Tibert & Dewey is emended. Keywords: evolution, marginal marine environments, paleoecology, Teresina Formation, taxonomy.

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来源期刊

Revista Brasileira De Paleontologia PALEONTOLOGY-

CiteScore

1.60

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： It publishes original contributions on all aspects of Paleontology. Papers are written in English, Spanish, or Portuguese and are reviewed by international experts.