Description de nouvelles espècies deradiolaires jurassiques de la dorsales calcaire externe (Rif, Maroc)

Resumen

The study of radiolaria obtained from the botton of the Jurassic radiolarian beds in the Rif "Dorsale calcaire externe" display the study of some new species. Sorne one and two new genres are described here. The presence of ammonites in the botton of that facies and the inmediately in the lower beds attribute an Upper Lias or Lower Dogger age to the siliceous micro-faune recolted.