Yuka’s tusks suggests that yuka was not older than 5.5 years woolly mammoth specimens with the similar dental age. The teeth generation (DP3/dp3-Dp4/dp4) and their state of wear, season of her death (autumn) and confirmed earlier the dental development delay in infants allowed to estimate Yuka’s age as 5.5 yr old juvenile. The hide morphology in the genital area suggests that Yuka was a female. The mDNA analyses demonstrated that Yuka clusters with previously published Siberian woolly mammoths falling into clade 1 and represents ancestral to a haplotype shared by two ~18 500 14C yr old mammoths, including the Yukagir Mammoth that was discovered ~140 km from the Yuka’s site. Yuka’s AMS calibrated radiocarbon date yielded the date between ~40 100–39 000 calendar years BP. A partial carcass of the woolly mammoth, Mammuthus primigenius, named “Yuka Mammoth,” was found thawed from the Pleistocene Yedoma (permafrost) deposits of the Oyogos Yar bluff on the coast of the Dmitry Laptev Strait.
