Pseudorhapydionina bilottei sp. nov., an endemic foraminifera from the post-Cenomanian/Turonian boundary (Pyrenees, NE Spain)

• Architecture of the Late Cretaceous genus Pseudorhapydionina.
• Pseudorhapydionina bilottei sp. nov. is endemic of the Pyrenean paleobioprovince.
• The new taxon extends the range of the genus to the Santonian.
• P. bilottei sp. nov. is possibly a migrant from the Tethyan paleobioprovince.

A new species of the foraminiferal genus Pseudorhapydionina is reported from the Santonian shallow-water carbonate and mixed deposits of La Cova Unit, in the Montsec and Pedraforca thrust sheets (Southern Pyrenees, NE Spain). Pseudorhapydionina bilottei sp. nov. differs from the Cenomanian species of the genus in its larger test size and the number of chambers in its early planispiral-involute stage. The discovery of P. bilottei sp. nov in the Santonian indicates that the genus Pseudorhapydionina escaped extinction during the Cenomanian-Turonian boundary (CTB) event in the Pyrenean bioprovince. A new subfamily Pseudorhapydionininae is described.