Fossilf\ufchrende Spaltenf\ufcllungen S\ufcddeutschlands und die 6kologie ihrer oligoz\ue4nen Huftiere

Volume: 18Start Page: 237End Page: 28

Ein neuer Fund des pleistoz\ue4nen Moschusochsen in Bayern

Volume: 20Start Page: 133End Page: 13

Nouvelles données sur la diversité des eomyidés (Mammalia, Rodentia) de l'Oligocène inférieur d'Europe de l'Ouest

Du nouveau matériel provenant de l\u27Oligocène basal du sud de l\u27Allemagne, et également de la fin de l\u27Oligocène inférieur de France et d\u27Espagne a été étudié. En Allemagne, en plus de l\u27unique espèce déjà connue Eomys antiquus (Aymard, 1853), deux autres espèces ont été trouvées, incluant un genre d\u27Eomyidae indéterminé, Eomyidae gen. et sp. indet., présentant des caractères morphologiques inattendus qui étaient jusque là considérés comme des caractères dérivés. Ces trois espèces montrent qu\u27au moins trois lignées différentes sont arrivées en Europe dès le début de l\u27Oligocène. En France et en Espagne, outre Eomys antiquus qui confirme sa large répartition géographique, les autres espèces trouvées ne semblent pas être les descendantes des espèces d\u27Allemagne, suggérant une autre phase d\u27immigration d\u27Eomyidae plus tardive en Europe. Au final, la diversité des premiers Eomyidae européens est plus importante qu\u27attendue, amenant à considérer un scénario évolutif plus complexe que celui proposé précédemment, à savoir une radiation unique depuis Eomys antiquus. Malgré le peu de matériel disponible, le genre indéterminé signalé ici comme nouveau présente des affinités morphologiques notables avec le genre Asianeomys Wu, Meng, Ye &amp; Ni, 2006 connu dans l\u27Oligocène supérieur d\u27Asie, suggérant ainsi la possible existence d\u27un ancêtre commun en Asie.New material of eomyids from the very Early Oligocene of southern Germany and the late Early Oligocene of France and Spain has been studied. In Germany besides the previously known and unique Eomys antiquus (Aymard, 1853), two other species have been found including an undetermined genus, Eomyidae gen. et sp. indet, with unexpected morphological features that were considered as derived based on our current knowledge. These three species show that at least three immigrant lineages were present as early as the beginning of the Oligocene in Europe. In France and Spain, except for Eomys antiquus which confirms its large geographical distribution, the species found are unlikely to have evolved from the German ones, thus suggesting another immigration wave of eomyids in Europe. Finally, the diversity of the first European eomyids is higher than expected, leading us to consider a more complex evolutionary history than a simple radiation from Eomys antiquus as previously proposed. Despite the limited material available, the undetermined genus, here considered as a likely new genus, shows some clear morphological affinities with the Asian late Oligocene genus Asianeomys Wu, Meng, Ye &amp; Ni, 2006, thus suggesting a possible common Asian ancestor.</p

Revision and Autopodial Morphology of the Chinese-European Rhinocerotid Genus Plesiaceratherium YOUNG 1937

Volume: 14Start Page: 81End Page: 10

New data about the diversity of Early Oligocene eomyids (Mammalia, Rodentia) in Western Europe

International audienceNew material of eomyids from the very Early Oligocene of southern Germany and the late Early Oligocene of France and Spain has been studied. In Germany besides the previously known and unique Eomys antiquus (Aymard, 1853), two other species have been found including an undetermined genus, Eomyidae gen. et sp. indet, with unexpected morphological features that were considered as derived based on our current knowledge. These three species show that at least three immigrant lineages were present as early as the beginning of the Oligocene in Europe. In France and Spain, except for Eomys antiquus which confirms its large geographical distribution, the species found are unlikely to have evolved from the German ones, thus suggesting another immigration wave of eomyids in Europe. Finally, the diversity of the first European eomyids is higher than expected, leading us to consider a more complex evolutionary history than a simple radiation from Eomys antiquus as previously proposed. Despite the limited material available, the undetermined genus, here considered as a likely new genus, shows some clear morphological affinities with the Asian late Oligocene genus Asianeomys Wu, Meng, Ye & Ni, 2006, thus suggesting a possible common Asian ancestor