Here we review published evidence for the palaeogeographic position of the Sibumasu terrane in the Ordovician, referring to evidence derived from fossils and also in relation to the sedimentary sequences developed over this im- portant area.These fossil faunas have been de- scribed in disparate publications over the last seventy years (many listed in Ingavat-Heimche, 1994). This review also provides a salutary re- minder of the uncertainties that still apply to