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Early Pleistocene origin and extensive intra-species diversity of the extinct cave lion.

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posted on 2020-08-05, 17:05 authored by David WG Stanton, Federica Alberti, Valery Plotnikov, Semyon Androsov, Semyon Grigoriev, Sergey Fedorov, Pavel Kosintsev, Doris Nagel, Sergey Vartanyan, Ian Barnes, Ross Barnett, Erik Ersmark, Doris Döppes, Mietje Germonpré, Michael Hofreiter, Wilfried Rosendahl, Pontus Skoglund, Love Dalén
The cave lion is an extinct felid that was widespread across the Holarctic throughout the Late Pleistocene. Its closest extant relative is the lion (Panthera leo), but the timing of the divergence between these two taxa, as well as their taxonomic ranking are contentious. In this study we analyse 31 mitochondrial genome sequences from cave lion individuals that, through a combination of 14C and genetic tip dating, are estimated to be from dates extending well into the mid-Pleistocene. We identified two deeply diverged and well-supported reciprocally monophyletic mitogenome clades in the cave lion, and an additional third distinct lineage represented by a single individual. One of these clades was restricted to Beringia while the other was prevalent across western Eurasia. These observed clade distributions are in line with previous observations that Beringian and European cave lions were morphologically distinct. The divergence dates for these lineages are estimated to be far older than those between extant lions subspecies. By combining our radiocarbon tip-dates with a split time prior that takes into account the most up-to-date fossil stem calibrations, we estimated the mitochondrial DNA divergence between cave lions and lions to be 1.85 Million ya (95% 0.52- 2.91 Mya). Taken together, these results support previous hypotheses that cave lions existed as at least two subspecies during the Pleistocene, and that lions and cave lions were distinct species.


Crick (Grant ID: 10595, Grant title: Skoglund FC001595)


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