巴西南部沿海平原Itapeva湖全新世介形类化石

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2021-08-28 DOI:10.4072/rbp.2021.2.01

Leonardo Timm Steiner Campos, Lucas DE Oliveira Nunes, C. T. Bergue

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引用次数: 0

摘要

本文对南里奥格兰德州海岸平原伊塔佩瓦湖岩心中的全新世介形虫进行了研究。在分析的9个样本中，登记了隶属于13科22属26种，其中两个是新的：Cytherella eros sp.nov.和Loxoconcha itapevensis sp.nov..组合的分类组成沿核心变化，其中Cyprideis multidentata Hartmann是最丰富和最常见的物种（273个样本），其次是Cytheretta punctata Sanguinetti（56个标本）和L.itapevensis sp.nov.（51个标本）。沿岩心观察到的丰富性和多样性的变化可能是伊塔佩瓦湖演化过程中沉积和水文变化的结果。这项工作的结果加强了介形虫在沿海古环境研究中的重要性。关键词：堰塞湖系统；生物地层学；微体古生物学；第四纪。

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Fossil Holocene Ostracoda from the Itapeva Lake, Southern Brazilian coastal plain

Holocene ostracods from a core obtained in the Itapeva Lake, Rio Grande do Sul coastal plain, are studied in this paper. Twenty-six species belonging to 22 genera and 13 families were registered in nine samples analyzed, two of them new: Cytherella eros sp. nov. and Loxoconcha itapevensis sp. nov. The taxonomic composition of the assemblages varies along the core, being Cyprideis multidentataHartmann the most abundant and frequent species (273 specimens), followed by Cytheretta punctata Sanguinetti (56 specimens) and L.itapevensis sp. nov. (51 specimens). Variation in richness and diversity observed along the core probably results from sedimentary and hydrological changes during the evolution of the Itapeva Lake. The results obtained in this work reinforce the importance of ostracods in the study of coastal paleoenvironments. Keywords: barrier-lagoon system, biostratinomy, micropaleontology, Quaternary.

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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.