ABSTRACT.- The global ammonoid record of the latest Famennian (Wocklumian) to Upper Tournaisian
is reviewed in order to analyze patterns of the palaeogeographical distribution, developments in time and to
elucidate the influence of the international Hangenberg and Lower Alum Shale Events.  Occurences of 77
genus-level taxa in 61 sedimentary provinces are summarized.  The terminal Devonian Hangenberg Event
caused a major ammonoid extinction but had little lasting influence on their palaeobiogeography.  However,
there was an unusual very short-timed spreading of ammonoid facies in formerly uninhabitated areas of North
America, Europe and NE-Siberia.  The Lower Alum Shale Event at the base of the classical Middle Tournaislan,
by contrast, marks a major palaeobiogeographical turning point associated with a medium scale extinction.
Centres of evolution shifted from the Europe-Ural area to the west (North American interior) and east
(Kazakhstan) and globally there is no significant faunal sequence crossing the event level.  Endemism and
faunal dispersal continue in the Upper Tournaisian with some evidence for the separation of two faunal
provinces.  The increasing spread of goniatite biofacies (enlargement of species-areas) as sign of sealevel
highstand and wide overflooding of epicratonic areas curiously is not paralleled by an increase of global
diversity.  This may reflect non-palaeogeographic factors such as global climatic change.  In a taxonomic
chapter potential subdivisions of the genera Acutimitoceras, lmitoceras and Eocanites are discussed.  The
Prodromitidae are assigned to the Prionocerataceae.