Aptian ostracods from the Santana Group, Araripe Basin, Brazil

IF 0.7 Q4 PALEONTOLOGY REVUE DE MICROPALEONTOLOGIE Pub Date : 2022-12-01 DOI:10.1016/j.revmic.2022.100694

Juliana Guzmán , Enelise Katia Piovesan , Débora Soares de Almeida-Lima , Ariany de Jesus e Sousa , Virgínio Henrique de Miranda Lopes Neumann

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引用次数: 3

Abstract

The Class Ostracoda provides a well preserved and diverse microfossil succession throughout the Aptian Santana Group, Araripe Basin, Brazil. The Santana Group, consisting of the Barbalha, Crato, Ipubi and Romualdo formations, records the post-rift sequence (Alagoas local stage) of the Gondwana break-up. The Alagoas Stage is characterised by ostracods grouped as Cytheridea? spp. 201–218 of which several have been identified as belonging to Pattersoncypris Bate and Damonella Anderson. From 2 well cores and 10 outcrops of the Santana Group, 25 taxa were identified, 5 of which are here newly described. Throughout the Santana Group, Pattersoncypris micropapillosa Bate and Damonella grandiensis Tomé, Lima Filho and Neumann were recovered. Restricted to the Barbalha Formation, Candonopsis? alagoensis Tomé, Lima Filho and Neumann and Pattersoncypris cucurves nov. sp are abundant. The Crato Formation shows higher ostracod diversity with Damonella grandiensis being the most abundant and associated with Cypridea araripensis Silva, Brasacypris subovatum Do Carmo, Coimbra, Whatley, Antonietto and Citon, Damonella pumila nov. sp., Pattersoncypris alta (Antonietto, Gobbo, Do Carmo, Assine, Fernandes and Silva), Zonocypris berthoui Piovesan, Melo, Cabral and Guzmán, Zonocypris dorsoconvexa Piovesan, Melo, Cabral and Guzmán, Ilyocypris coimbrai nov. sp., Neuquenocypris berthoui Colin and Dépêche, Neuquenocypris sp., Rhinocypris spinata nov. sp., Theriosynoecum silvai (Silva), Theriosynoecum sp., Timiriasevia? sp. and Alicenula martinsi (Silva). The Ipubi and Romualdo formations record abundant Pattersoncypris crepata (Do Carmo, Coimbra, Whatley, Antonietto and Citon) in association with P. alta, Pattersoncypris kroemmelbeini nov. sp., P. symmetrica (Krömmelbein and Weber) and Alicenula martinsi (Silva). Theriosynoecum colini Do Carmo, Coimbra, Whatley, Antonietto and Citon, Ilyocypris coimbrai nov. sp. and Rhinocypris spinata nov. sp. also occur in the Ipubi Formation.

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巴西Araripe盆地Santana群的Aptian介形类

介形类为巴西Araripe盆地Aptian Santana群提供了一个保存完好且多样的微化石序列。桑塔纳群由Barbalha组、Crato组、Ipubi组和Romualdo组组成，记录了冈瓦纳断裂后的裂谷序列(Alagoas局部阶段)。阿拉戈斯期的特征是介形虫，归类为Cytheridea?第201-218种，其中有几种已被确定属于pattersoncyris Bate和Damonella Anderson。从桑塔纳群的2口岩心和10个露头中鉴定出25个分类群，其中5个为新描述。在整个桑塔纳群中，发现了微papillosa Bate和Damonella grandensis tom， Lima Filho和Neumann。只限于Barbalha组，Candonopsis?alagoensis tom、Lima Filho、Neumann和pattersoncyris曲线丰富。克拉托组介形虫多样性较高，其中Damonella grandiensis最丰富，与Cypridea araripensis Silva、Brasacypris subbovatum Do Carmo、Coimbra、Whatley、Antonietto和Citon、Damonella pumila 11 . sp、pattersoncypriis alta (Antonietto、Gobbo、Do Carmo、Assine、Fernandes和Silva)、zoncypris berthoui Piovesan、Melo、Cabral和Guzmán、zoncypris dorsoconvexa Piovesan、Melo、Cabral和Guzmán、ilycypris coimbrai 11 . sp、Neuquenocypris berthoui Colin and Dépêche, Neuquenocypris sp.， Rhinocypris spinata 11 . sp.， Theriosynoecum silvai (Silva)， Theriosynoecum sp.， Timiriasevia?sp.和Alicenula martinsi (Silva)。Ipubi和Romualdo组记录了丰富的pattersoncyris crepata (Do Carmo、Coimbra、Whatley、Antonietto和Citon)，与P. alta、P. pattersoncyris kroemmelbeini 11 . sp、P. symmetrica (Krömmelbein和Weber)和Alicenula martinsi (Silva)有关。Carmo, Coimbra, Whatley, Antonietto和Citon, ilycypris coimbrai nov. sp.和Rhinocypris spinata nov. sp.也出现在Ipubi Formation。

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REVUE DE MICROPALEONTOLOGIE PALEONTOLOGY-

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2.50

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期刊介绍： La Revue de micropaléontologie publie 4 fois par an des articles de intérêt international, consacrés à tous les aspects de la micropaléontologie. Les textes, en anglais ou en français, sont des articles originaux, des résultats de recherche, des synthèses et mises au point, des comptes rendus de réunions scientifiques et des analyses de ouvrages. La revue se veut résolument ouverte à tous les aspects de la micropaléontologie en accueillant des travaux traitant de la systématique des microfossiles (et de leurs équivalents actuels), des bactéries aux microrestes de vertébrés, et de toutes leurs applications en sciences biologiques et géologiques.