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Piovesan E.K.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | Cabral M.C.,University of Lisbon | Colin J.-P.,University of Lisbon | Fauth G.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | Trescastro Bergue C.,Itt Fossil Instituto Tecnologico Of Micropaleontologia
Carnets de Geologie | Year: 2014

This paper describes thirteen new species and two new genera of marine and brackish water ostracodes from the Turonian deposits of Potiguar Basin, NE Brazil, among a total of 53 taxa. The new species include Cophinia grekoffi, Fossocytheridea tiberti, Haughtonileberis dinglei, Hemicytherura viviersae, Jandairella obesa (new genus and species), Loxocorniculum? narendrai, Ovocytheridea posteroprojecta, O. reymenti, Perissocytheridea caudata, P. mossoroensis, Potiguarella grosdidieri (new genus and species), P. coimbrai and Procytherura ballentae. The diversity and dominance indexes vary according to the paleoenvironment. Three assemblages were identified: a predominantly mixohaline fauna in the basal part of the section, followed by a diversified shallow marine fauna and, in the upper part, a marine and brackish water ostracode fauna. Most of the recorded species are endemic. Eight species are common to Northwest and North Africa, indicating a faunal link during the Turonian. The study of the Turonian faunas of the Potiguar Basin represents a significant improvement to understand the dynamic evolution of the Brazilian basins and the paleobiogeographical relationship with other regions.


Piovesan E.K.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | CABRAL M.C.,University of Lisbon | Colin J.-P.,University of Lisbon | Fauth G.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | Bergue C.T.,Itt Fossil Instituto Tecnologico Of Micropaleontologia
Carnets de Geologie | Year: 2014

Sixty-four Ostracoda taxa were recorded from the Santonian-Campanian of Potiguar Basin, northeastern Brazil. The following new species were described: Triebelina anterotuberculata, Triebelina obliquocostata, Cophinia ovalis, Fossocytheridea potiguarensis, Ovocytheridea anterocompressa, Ovocytheridea triangularis, Perissocytheridea jandairensis, Semicytherura musacchioi and Protocosta babinoti. The faunal association indicates predominantly shallow marine environments, intercalated with typically mixohaline levels. These species are mostly endemic, although the presence of six species common to West and North Africa shows that migration was still possible by the end of the Cretaceous. © 2014 Carnets de Geologie. All rights reserved.


Kochhann K.G.D.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | Baecker-Fauth S.,Itt Fossil Instituto Tecnologico Of Micropaleontologia | Fauth G.,Itt Fossil Instituto Tecnologico Of Micropaleontologia
Geodiversitas | Year: 2013

This work presents a taxonomic study on the Late Maastrichtian radiolarian fauna from ODP Leg 165, Hole 999B, Colombian Basin. The studied fauna is composed by 24 species, being the family Archaeodictyomitridae Pessagno, 1976 the most abundant and diverse. Original opaline skeletons are replaced by calcium carbonate and precise identifications are possible only for those specimens with sturdy skeletons, what strongly suggests a preservational bias. The studied radiolarian fauna was attributed to the Amphipyndax tylotus zone, due to the occurrence of that species. Besides, the fauna described herein presents a low to intermediate latitude paleobiogeographic affinity and falls within the designation of a typical lower bathyal to abyssal one. Finally, the data presented herein are compared to those reported from the closely related ODP Hole 1001B. © Publications Scientifiques du Muséum national d'Histoire naturelle, Paris.

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