Placoziphius duboisii

Placoziphius duboisii is an extinct toothed whale from the Miocene of Belgium, the species of the genus Placoziphius, which is placed in the subfamily Physeterinae of the sperm whale line. Its remains were first uncovered south of Antwerp, in the Edegem Sands member of the Berchem Formation. The holotype, catalogued as IRSNB M.530, is a fragmentary skull that keeps most of the rostrum, pieces of the supraorbital processes and the supracranial basin, the two squamosal and exoccipital sets, and an associated fragment of the atlas. The animal was larger than any known kogiid, the family of the pygmy and dwarf sperm whales, and was similar in size to Diaphorocetus and to the smallest specimens of Orycterocetus. Some sources spell the species name duboisi.