A late Viséan section of clastic and carbonatic rocks is described from the eastern part of the Anti-Atlas
(Morocco).  The sedimentary succession is a mixed carbonate-siliciclastic system influenced by sea-level
fluctuations.  The sedimentology of the section is interpreted with respect to transgressive-regressive
cycles and systems tracts.  Highstand sediments yielded ammonoid assemblages from six horizons; a total
of 1,040 specimens separated into 20 species are described in the palaeontological section.  The genus
Itimaites is new, together with the 16 new species Itimaites parabolicus n. sp., Calygirtyoceras zrigatense
n. sp., Sudeticeras fornicum n. sp., Sudeticeras pusillobatum n. sp, Sudeticeras occultornatum n. sp.,
Goniatites rodioni n. sp, Goniatites gerberi n. sp., Goniatites evelinae n. sp., Hypergoniatites fusiger n. sp.,
Neogoniatites worki n. sp., Dombarites bellornatus n. sp., Platygoniatites rhanemensis n. sp., Ferganoceras
torridum n. sp., Prolecanites meandricus n. sp., Prolecanites mapesi n. sp., Epicanites hamianensis n. sp.,
and Megapronorites itimensis n. sp.