A new Late Viséan ammonoid assemblage from the Anti-Atlas (Early Carboniferous, Morocco)

A new, unusually composed Late Viséan ammonoid assemblage is described from the Gara el Itima (eastern Anti-Atlas, Morocco). In addition to the species Goniatites rodioni, the assemblage includes very large specimens of Merocanites and specimens of the new genus Xenoglyphioceras gen. nov., which is interpreted to occupy a phylogenetic position between Beyrichoceras and Ferganoceras. The new species Merocanites consequius sp. nov. and Xenoglyphioceras eidos gen. et sp. nov. are described.