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On the Upper Cretaceous age and affinities of Neocyprideis lusitanicus (Ostracoda)
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Resumo(s)
Guernet & Lauverjat (1986) described a new species, Neocyprideis lusitanicus, from sediments deposited near Aveiro, Portugal. For these authors, some associated fossils (Molluscs, planktonic Foraminifera) indicated a Pliocene age. That seemingly
was the first record of Neocyprideis in post-Miocene sediments in Europe.
A recent study of Upper Cretaceous material from the same region showed an abundant Neocyprideis fauna, associated with
Charophyta. These Neocyprideis could be assigned without any doubt to N. lusitanicus. Therefore, N. lusitanicus appears as an Upper Cretaceous species, reworked in much later sediments, not Pliocene but Quaternary, as indicated by the planktonic Foraminifera assemblage. This interpretation is supported by:
1 - the incompatibility of the Neocyprideis (restricted to lacustrine-lagoonal environments) with abundant planktic
Foraminifera;
2 - the occurrence of N. lusitanicus with Charophytes and non marine, cretaceous vertebrates but without the same
Foraminifera.
Neocyprideis lusitanicus is a valid species, clearly different from the other late Cretaceous species (N. coudouxensis and
N. murciensis) as well as the Early Miocene described species (N. aquitanica, N. janoscheki).
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Palavras-chave
Ostracoda Neocyprideis lusitanicus Late Cretaceous Aveiro Portugal