Silurian and Devonian Heteroconchia Cardiomorphi Bivalves from Bolivia

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Ameghiniana Pub Date : 2021-09-30 DOI:10.5710/AMGH.13.08.2021.3446

A. D. Farjat, Mario Suárez Riglos, J. Ortiz

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引用次数: 1

Abstract

Abstract. Heteroconchia Cardiomorphi bivalves from Silurian and Devonian beds of the Central Andean Basin of Western Gondwana are herein presented. This paper is not only a systematic updated revision of three Heteroconchia Cardiomorphi genera, but it also includes the description of new findings and first reports of some taxa in the basin. They were collected in nine scattered outcrops in the Interandean and Subandean regions of Bolivia. A total of 22 specimens, well- to regularly-preserved was studied. The genus Pleurodapis, is reported for the first time from Ludlow–Pridoli successions of Alarache, southern Subandean as Pleurodapis sp. A. The cosmopolitan genus Paracyclas is reported in the Central Andean Basin for the first time, from the Middle Devonian of Subandean as Paracyclas? sp. The species Pleurodapis multicincta and Cardiomorpha oblonga, are described from the central Subandean and the Interandean regions for the first time in the basin. This research is also a contribution to understand the distribution and the richness of Silurian and Devonian bivalves in Central Andean Basin and their relations with the surrounding basins of Gondwana.

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玻利维亚志留纪和泥盆纪异孔虫

摘要本文介绍了冈瓦纳大陆西部安第斯盆地中部志留纪和泥盆纪地层中的异壳类变形双壳类。本文不仅是对三个异孔虫属心形目的系统更新，而且还包括对该盆地一些分类群的新发现和首次报告的描述。它们是在玻利维亚的Interandean和Subandean地区的九个分散的露头中采集的。总共研究了22个保存完好到有规律的标本。Pleurodapi属首次在苏班底亚南部Alarache的Ludlow–Pridoli序列中被报道为Pleurodapis sp.A。世界性的Paracyclas属首次在安第斯盆地中部被报道为Paracyclas？sp.在该盆地中首次描述了苏班地亚中部和班地亚间地区的物种Pleurodapis multicinta和Cardiomorpha oblonga。这项研究也有助于了解安第斯盆地中部志留纪和泥盆纪双壳类的分布和丰富度，以及它们与冈瓦纳大陆周围盆地的关系。

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来源期刊

Ameghiniana 地学-古生物学

CiteScore

2.50

自引率

10.00%

发文量

期刊介绍： Ameghiniana is a bimonthly journal that publishes original contributions on all disciplines related to paleontology, with a special focus on the paleontology of Gondwana and the biotic history of the southern hemisphere. Published yearly since 1957, it has undoubtedly become the main palaeontological publication from Latin America. Ameghiniana has recently broadened its editorial board, reorganized its production process, and increased to a bimonthly frequency, which resulted in a significant decrease in the turn around time.