Fig. 1. A in The genus Discoceras (Tarphyceratida, Cephalopoda; Ordovician) from Estonia and glacial erratics in north-central Europe

Fig. 1. A. Map showing the geographic position of the localities, at which the specimens of Discoceras Barrande, 1867 described herein were collected. B. Detailed map with localities in north-eastern Germany and western Poland. C. Detailed map with localities in Estonia. Map prepared using the QGIS software (QGIS Development Team 2024) (using the open-source World Map, OpenStreetMap and "WISE Large rivers and large lakes F1v1 geodatabase" of the European Environment Agency). Number coding of localities in Table 1.