File:Alempic 2023 permafrost viruses.jpg

English: "This image (from Alempic 2023) shows some of the ancient viruses revived by French researchers from the permafrost.

"Morphological features guiding the preliminary identification of newly isolated viruses (negative staining, TEM). (A) The large ovoid particle (1000 nm in length) of Pandoravirus yedoma (strain Y2) (sample #5 in Table 1) showing the apex ostiole (white arrowhead) and the thick tegument characteristic of the Pandoraviridae family. (B) A mixture of Pandoravirus mammoth (strain Yana14) oblate particles and of Megavirus mammoth (strain Yana14) icosahedral particles exhibiting a “stargate” (white starfish-like structure crowning a vertex, white arrowhead) as seen in sample #7 (Table 1). (C) The elongated particle of Cedratvirus lena (strain DY0) (1500 nm in length) exhibits two apex cork-like structures (white arrowheads) (sample #2, Table 1). (D) The elongated particle of Pithovirus mammoth (1800 nm in length) (sample #7, Table 1) exhibiting a single apex cork-like structure (white arrowhead). (E) The large (770 nm in diameter) “hairy” icosahedral particle of Megavirus mammoth (strain Yana14), showing the “stargate” (white arrowhead) characteristic of the Megavirinae subfamily (sample #7, Table 1). (F) The smaller icosahedral particle (200 nm in diameter) of Pacmanvirus lupus (strain Tums2) (sample #9, Table 1) typical of asfarviruses/pacmanviruses."