Meyer Matthias, Palkopoulou Eleftheria, Baleka Sina, Stiller Mathias, Penkman Kirsty E H, Alt Kurt W, Ishida Yasuko, Mania Dietrich, Mallick Swapan, Meijer Tom, Meller Harald, Nagel Sarah, Nickel Birgit, Ostritz Sven, Rohland Nadin, Schauer Karol, Schüler Tim, Roca Alfred L, Reich David, Shapiro Beth, Hofreiter Michael
Max Planck Institute for Evolutionary Anthropolgy, Leipzig, Germany.
Department of Genetics, Harvard Medical School, Boston, United States.
Elife. 2017 Jun 6;6:e25413. doi: 10.7554/eLife.25413.
The straight-tusked elephants spp. were widespread across Eurasia during the Pleistocene. Phylogenetic reconstructions using morphological traits have grouped them with Asian elephants (), and many paleontologists place within . Here, we report the recovery of full mitochondrial genomes from four and partial nuclear genomes from two fossils. These fossils were collected at two sites in Germany, Neumark-Nord and Weimar-Ehringsdorf, and likely date to interglacial periods ~120 and ~244 thousand years ago, respectively. Unexpectedly, nuclear and mitochondrial DNA analyses suggest that was a close relative of extant African forest elephants (). Species previously referred to are thus most parsimoniously explained as having diverged from the lineage of , indicating that has not been constrained to Africa. Our results demonstrate that the current picture of elephant evolution is in need of substantial revision.
直牙象属在更新世期间广泛分布于欧亚大陆。利用形态特征进行的系统发育重建将它们与亚洲象归为一类,许多古生物学家将其置于亚洲象属内。在此,我们报告了从四个直牙象化石中获得的完整线粒体基因组以及从两个直牙象化石中获得的部分核基因组。这些化石是在德国的两个地点采集的,即新马克 - 诺德和魏玛 - 埃林斯多夫,它们可能分别追溯到约12万年和24.4万年前的间冰期。出乎意料的是,核DNA和线粒体DNA分析表明,直牙象是现存非洲森林象的近亲。因此,以前被归为直牙象属的物种最简约的解释是它们已经从直牙象的谱系中分化出来,这表明直牙象并不局限于非洲。我们的结果表明,目前大象进化的图景需要进行重大修正。