In this contribution to "Palaeozoic Ostracod Classification" the analysis o
f the Superfamily Bairdiacea SARs, 1888 is continued. The systematics and t
he stratigraphical, ecological and zoogeographical significance of the Fami
ly Beecherellidae ULRICH, 1894 (Middle Ordovician - Upper Carboniferous, ?
Permian; world-wide) an discussed.