FIGURE 6. 1-7: Microtodon atavus Schlosser, 1924 from Ertemte 2, Inner Mongolia (Nei Mongol), late Turolian MN 13, China; 8-13: Prosomys mimus Shotwell, 1956 from Christmas Valley, Lake County, Eastern Oregon, late Hemphillian, USA; 14-18, 20, 24, 25: Promimomys insuliferus (Kowalski) from Podlesice, early Ruscinian, MN 14, Southern Poland (15-16, 22, 27, 28) and from Antipovka, the Central Russian Plain, South Ural, early Ruscinian, MN 14, Russia (17,18,20,21); 19, 23-26: Promimomys cor Kretzoi from Vendargues, early Ruscinian, MN 14a, southern France. - 1-5, 9-11, 13, 14, 17-18, 22, 23, 25, 26: m1; 6, 7, 12, 24: M3; 15: m1-3; 16: M1-3; 27, 28: lower left jaw with m1-2; 1-12, 15-21, 24-26: occlusal views; 13, 14, 22, 23, 27: buccal views, 28: lingual view. All figured as left molars; not to scale.