Late Viséan (Mississippian) ammonoids (Cephalopoda) from the Central Moroccan Meseta

Late Viséan (Mississippian) ammonoids (Cephalopoda) from the Central Moroccan Meseta are described monographically for the first time. Several localities have yielded low-diversity assemblages, consisting mainly of species already known from southern Portugal, Ireland, northern England and the Rhenish Mountains. This clearly places the Moroccan Meseta within the Rhenohercynian-Subvariscan Province. The assemblages from the Moroccan Meseta are confined to a narrow stratigraphic interval, likely representing the Goniatites crenistria Zone, Goniatites sphaericus Zone, Goniatites spirifer Zone and Arnsbergites gracilis Zone. The new species Goniatites amarensis sp. nov. is described.