Brackish and marine ostracode assemblages from the Sinemurian of western Portugal, with descriptions of new species

Sinemurian ostracodes from the Lusitanian Basin (western Portugal, Iberian Peninsula) were studied using twelve samples from the marl-limestone succession of the Coimbra Formation at S. Pedro de Moel, north of Lisbon. The detailed taxonomical study identified 11 genera and 14 species, among which 3...

Full description

Saved in:
Bibliographic Details
Published in:Micropaleontology 2015-01, Vol.61 (1/2), p.3-24
Main Authors: Cabral, M. Cristina, Colin, Jean-Paul, Azerêdo, Ana C., Silva, Ricardo L., Duarte, Luís V.
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Sinemurian ostracodes from the Lusitanian Basin (western Portugal, Iberian Peninsula) were studied using twelve samples from the marl-limestone succession of the Coimbra Formation at S. Pedro de Moel, north of Lisbon. The detailed taxonomical study identified 11 genera and 14 species, among which 3 are new species: Phraterfabanella boomeri Cabral and Colin n. sp., Klieana? coimbraensis Cabral and Colin n. sp. and "Klinglerella" roselinae Cabral and Colin n. sp.. The recognized ostracode species are particularly similar to those described from the uppermost Hettangian-Sinemurian offshore Southwest Ireland (Fastnet Basin) and France (Normandy, Central France and Quercy). Overall, the assemblages include four brackish species (one clearly dominant) and ten marine species. The paleoecological analysis of the assemblages allowed a detailed paleoenvironmental reconstruction, reflecting frequent variations from brackish to restricted marine to slightly more open marine settings, which is supported by sedimentological and other paleontological data.
ISSN:0026-2803
1937-2795
DOI:10.47894/mpal.61.1.02