The middle Famennian (Late Devonian) Enkenberg section is studied in terms of ammonoid and
  conodont zonations.  Six ammonoid zones (Paratonoceras lentiforme Zone, Maeneceras meridionale
  Zone, Pernoceras dorsatum Zone, Pseudoclymenia pseudogoniatites Zone, Prolobites delphinus Zone,
  and Platyclymenia annulata Zone) and six conodont zones (Early marginifera Zone, Late marginifera
  Zone, Latest marginifera Zone, Early trachytera Zone, Late trachytera Zone, and postera Zone) could
  be recognised and exactly correlated.
      The new taxa Posttornoceras fallax KORN n.sp. and Nehdenites KORN n.gen. are described; Post-
  tornoceras contiguum (MÜNSTER 1832) as well as Maeneceas meridionale (FRECH 1897) are revised.

  Key words: Biostratigraphy, ammonoids, conodonts, Famennian, Devonian, Rhenish Mountains.