S u m m a r y : Described genera of the family Gephuroceratidae (Timanites,
   Manticoceras, Hoeninghausia, Probeloceras, Crickites, Uchtites) and their taxonomic
   history,are reviewed, und the diagnoses for all genera emended.
      In particular, Koenenites is considered as a junior synonym of Hoeninghausia;
   but the name is retained on a subgeneric level for species in which the whorls are
   laterally flattened or slightly convex and have a narrowly rounded venter through
   all growth stages.
      Among the Russian genera, Komioceras should be excluded from the family and
   probably connected with the Pharciceratidae.  Carinoceras represents a junior syn-
   onym of Manticoceras, but may be used as a subgenus for all oxycone species within
   this genus.  Tbc position of Timanoceras remains uncertain; it is possibly a junior
   synonym of either Manticoceras or Crickites.
      As shown by statistical analysis, most Manticoceras species are distinctive with
   respect to mature suture line, growth lines, shell geometry and ornamentation.  On
   this basis the division of the genus into five subgenera is suggested: M. (Prochorites),
   M. (Maternoceras) n. s u b g., M. (Sphaeromanticoceras) n. s u b g., M. (Manticoceras)
   and M. (Carinoccras).
      The phylogenetic history of the Gephuroceratidae is tentatively outlined.