Early Jurassic (Sinemurian) gastropods from the Lusitanian Basin (west of Portugal)

The Sinemurian gastropod specimens herein studied come from two sources: from museum collections and from samplings in field. The study of the Sinemurian gastropod specimens housed in the collections of the Museu Geologico (Laboratorio Nacional de Energia e Geologia), Museu Nacional de Historia Natural e da Ciencia (University of Lisbon), Museu da Ciencia (University of Coimbra) and of the Museu de Historia Natural e da Ciencia (University of Porto), has allowed the systematic and taxonomical update of this material. These specimens come mostly from Sinemurian outcrops in S. Pedro de Moel area and Coimbra region. The review of these collections permitted to recognise original material that was used to describe several characteristic species of the Lusitanian Basin, namely Scurriopsis (Scurriopsis) schmidti, Cryptaenia sp., Nerinella ficalhoi, and Boehmiola exilis. The most common species are endemic of the Lusitanian Basin, namely Pseudomelania costae Pictet & Campiche, 1862 and Oonia casta Bohm, 1901. Other species are known in Germany,Luxembourg and Austria basins.