frozen in permafrost since 2003. It has a sister taxon, Mollivirus kamchatka. Mollivirus sibericum is an approximately spherical virion 0.6 μm in diameter...

2014, two ~30,000 years old giant virus species, Pithovirus sibericum and Mollivirus sibericum, were discovered in the Siberian permafrost and they retained...

Bartoli J, Lescot M, et al. (September 2015). "In-depth study of Mollivirus sibericum, a new 30,000-y-old giant virus infecting Acanthamoeba". Proceedings...