New! Sign up for our free email newsletter.
Science News
from research organizations

Ancient DNA offers new view on saber-toothed cats' past

Date:
October 19, 2017
Source:
Cell Press
Summary:
Researchers who've analyzed the complete mitochondrial genomes from ancient samples representing two species of saber-toothed cats have a new take on the animals' history over the last 50,000 years. The data suggest that the saber-toothed cats shared a common ancestor with all living cat-like species about 20 million years ago. The two saber-toothed cat species under study diverged from each other about 18 million years ago.
Share:
FULL STORY

Researchers who've analyzed the complete mitochondrial genomes from ancient samples representing two species of saber-toothed cats have a new take on the animals' history over the last 50,000 years. The data suggest that the saber-toothed cats shared a common ancestor with all living cat-like species about 20 million years ago. The two saber-toothed cat species under study diverged from each other about 18 million years ago.

"It's quite crazy that, in terms of their mitochondrial DNA, these two saber-toothed cats are more distant from each other than tigers are from house cats," says Johanna Paijmans at the University of Potsdam in Germany.

Paijmans and colleagues reconstructed the mitochondrial genomes from ancient-DNA samples representing three Homotherium from Europe and North America and one Smilodon specimen from South America. One of the Homotherium specimens under investigation is a unique fossil: a 28,000-year-old mandible recovered from the North Sea.

"This find was so special because Homotherium is generally believed to have gone extinct in Europe around 300,000 years ago, so [this specimen is] over 200,000 years younger than the next-to-youngest Homotherium find in Europe," Paijmans explains.

The new DNA evidence confirmed that this surprisingly young specimen did indeed belong to a Homotherium. The discovery suggests that the saber-toothed cats continued to live in Europe much more recently than scientists previously thought.

"When the first anatomically modern humans migrated to Europe, there may have been a saber-toothed cat waiting for them," Paijmans says.

The finding raises new questions about how and why the saber-toothed cats went extinct. Paijmans says they are now interested in studying DNA from other samples of saber-toothed cats. Although it will be technically challenging, they also hope to recover and analyze DNA from much older Homotherium specimens.

This project received funding from the European Research Council, the European Union's Seventh Framework Programme for research, technological development, and demonstration and the Lundbeck Foundation.


Story Source:

Materials provided by Cell Press. Note: Content may be edited for style and length.


Journal Reference:

  1. Johanna L.A. Paijmans, Ross Barnett, M. Thomas P. Gilbert, M. Lisandra Zepeda-Mendoza, Jelle W.F. Reumer, John de Vos, Grant Zazula, Doris Nagel, Gennady F. Baryshnikov, Jennifer A. Leonard, Nadin Rohland, Michael V. Westbury, Axel Barlow, Michael Hofreiter. Evolutionary History of Saber-Toothed Cats Based on Ancient Mitogenomics. Current Biology, 2017; DOI: 10.1016/j.cub.2017.09.033

Cite This Page:

Cell Press. "Ancient DNA offers new view on saber-toothed cats' past." ScienceDaily. ScienceDaily, 19 October 2017. <www.sciencedaily.com/releases/2017/10/171019143018.htm>.
Cell Press. (2017, October 19). Ancient DNA offers new view on saber-toothed cats' past. ScienceDaily. Retrieved April 18, 2024 from www.sciencedaily.com/releases/2017/10/171019143018.htm
Cell Press. "Ancient DNA offers new view on saber-toothed cats' past." ScienceDaily. www.sciencedaily.com/releases/2017/10/171019143018.htm (accessed April 18, 2024).

Explore More

from ScienceDaily

RELATED STORIES