Science. 1964 Aug 21;145(3634):809-11. doi: 10.1126/science.145.3634.809.
Isolated teeth of multituberculates have been found in association with late Eocene fossil mammals. Previous studies reported that multituberculates were not found in deposits younger than early Eocene age (Graybull provincial substage or equivalents). This newly found occurrence indicates that these animals are more likely to be late Eocene in age than reworked early Eocene materials.
已发现与晚始新世化石哺乳动物相关联的多瘤齿兽孤立牙齿。先前的研究报告称,在早始新世(格雷布尔省级亚阶或同等物)年龄以下的沉积物中未发现多瘤齿兽。这一新的发现表明,这些动物的年龄更有可能是晚始新世,而不是再加工的早始新世材料。