Late Miocene marine ostracods from Santa Maria island,Azores (NE Atlantic): Systematics,palaeoecology and palaeobiogeography |
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| Authors: | Ricardo Piazza Meireles Costanza Faranda Elsa Gliozzi Adriano Pimentel Vittorio Zanon Sérgio P Ávila |
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| Institution: | 1. Departamento de Biologia, Universidade dos Açores, 9501-801 Ponta Delgada, Azores, Portugal;2. CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Azores, Portugal;3. Marine PalaeoBiogeography (MPB) Working Group, University of Azores, Azores, Portugal;4. Departamento de Geociências, Universidade dos Açores, Ponta Delgada, Azores, Portugal;5. Centro de Vulcanologia e Avaliação de Riscos Geológicos (CVARG), Azores, Portugal;6. Dipartimento di Scienze Geologiche, Università Roma Tre, Largo San Leonardo Murialdo 1, 00146 Roma, Italy |
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| Abstract: | The nine oceanic islands that comprise the Azores archipelago are located in the middle of the northern Atlantic Ocean. In this isolated archipelago, there is a rich fossil record in one of the islands, Santa Maria. In this island, samples were collected in the Upper Miocene composite section of Malbusca outcrop, located in the southern shore of the island, and the fossil marine Ostracoda were studied. This work represents the first report of fossil ostracods from the Azores archipelago. Thirteen species were found, representing seven families and 12 genera (Xestoleberis, Loxoconcha, Callistocythere, Leptocythere, Dameriacella, Aurila, Heliocythere, Pachycaudites, Neonesidea, Cyamocytheridea, ?Quadracythere and Paracypris). Among the identified species, one new species, Leptocythere azorica n. sp., is described. Loxoconcha (two species) was the most diversified genus. The collected species are mainly ornamented and typical of warm waters and epi-neritic habitats (～ 10–50 m of depth). |
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