Fig. 3 in Fusiteuthis polonica, a rare and unusual belemnite from the Maastrichtian

Fig. 3. Stratigraphical diagram, showing the range of Fusiteuthis Kongiel on the north European belemnite zonal scale. This scale was critically assessed by Christensen (1996), who noted that the Early Maastrichtian Belemnella zones are either interval or total range zones. Moreover, he showed that the base of the B. kazimiroviensis Zone is highly diachronous and becomes progressively younger from the eastern part of the Russian Platform in the east to the Netherlands in the west. The zone is Late Maastrichtian in the east, late Late Maastrichtian in Denmark and latest Maastrichtian in the Netherlands.