Sixteen late Emsian and Eifelian sections (Early and Middle Devonin) in the Tafilalt (eastern
 Anti-Atlas, Morocco), several previously undescribed, were investigated, figured, and de-
 scribed.  In order to develop a coherent stratigraphical scheme based on ammonoids, the
 method of graphic correlation was applied to 14 highly fossiliferous seetions in the study area.
 This produced an ammonoid range chart based on the Tafilalt Regional Composite and the
 suratigraphical subdivision of the included sections.  The conclusions were tested by compar-
 ing them with a lithostratigraphical correlation of the sections.  Consequently, the following
 stratigraphical succession of the late Emsian to Eifelim ammonoid faunas in the Tafilalt is
 suggested: Latanarcestes noeggerathi Unit, Sellanarcestes wenkenbachi Unit, Anarcestes
 lateseptatus Unit, Foordites veniens Unit, Pinacites jugleri Unit, Subanarcestes macro-
 cephalus Unit, Cabrieroceras crispiforme Unit, Cabrieroceras housei Unit, Agoniatites
 vanuxemi Unit, Parodiceras magnosellaris Unit, Agoniatites obliquus Unit, Holzapfeloceras
 circumflexiferum Unit.
    The family Pinacitidae and the genera Fidelites, Pinacites, Exopinacites, Sellanarcestes,
 Paranarcestes, Werneroceras, Crispoceras, Cabrieroceras, and Subanarcestes are revised and
 the following new genera are introduced: Achguigites gen. n., Pseudofidelites gen. n., Para-
 fidelites gen. n., Mimotornoceras gen. n., Wendtia gen. n., and Diallagites gen. n.

 Keywords: Graphic correlation, Ammonoidea, Early Devonian, Middle Devonian, Tafilalt,
                     Morocco