D.Korn, J.Bockwinkel, V.Ebbighausen & C.Klug, 2003:
 An early Late Tournaisian (Early Carboniferous/Mississippian) ammonoid fauna is described from the Tafilalt of
 south-eastern Morocco. Twelve genera, four of which are new, and eleven new species are represented: Becanites
 africanus sp. nov., Triimitoceras epiwocklumeriforme gen. et sp. nov., Irinoceras minutum sp, nov., Muensteroceras
 quadriconstrictum sp. nov., Eurites bouhamedensis sp. nov., Ouaoufilalites ouaoufilalensis gen. et sp. nov., Helicocyclus
 fuscus sp. nov., Pericyclus mercatorius sp. nov., Orthocyclus (?) sp., Bouhamedites enigmaticus gen. et sp. nov.,
 Winchelloceras antiatlanteum sp. nov., and Progoniatites maghribensis gen. et sp. nov.  Palaeogeographic analysis of
 Late Tournaisian ammonoid assemblages shows strong endemism at the species-level, but genera and families had a
 nearly global distribution in the equatorial seas.  The new fauna contains the stratigraphically oldest known representa-
 tives of the important Carboniferous goniatite families Girtyoceratidae and Goniatitidae.