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Worms Revived After 46,000 Years Frozen in Siberian Permafrost
Oxytropidoceras posted a topic in Fossil News
A worm that survived 46,000 years in permafrost wows scientists Emma Bowman, NPR radio, July 30, 2023 Nematode resurrected from Siberian permafrost lay dormant for 46,000 years By Sascha Pare, LiveScience, July 27, 2023 Worms Revived After 46,000 Years Frozen in Siberian Permafrost Scientists want to understand how the worms survived in extreme conditions for extraordinarily long periods of time. By Orlando Mayorquin, New York Times, July 29, 2023 The open access paper is: Shatilovich, A., Gade, V.R., Pippel, M., Hoffmeyer, T.T., Tchesunov, A.V., Stevens, L., Winkler, S., Hughes, G.M., Traikov, S., Hiller, M. and Rivkina, E., 2022. A novel nematode species from the Siberian permafrost shares adaptive mechanisms for cryptobiotic survival with C. elegans dauer larva. PLOS Genectics. 19(7): e1010798 biorxiv.org preprint Peer review history Yours, Paul H.- 2 replies
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So.....I was splitting my last piece of Pennsylvanian stark shale member, between Winterset and Bethany Falls limestone from a 2x2' 2" thick piece, I found some cool conodonts, a lot of scolecodonts, and amassing a pile of split shale, when I came upon yet another listracanthus/fish spine, about 5-6cm in length and very slender (2-3mm in width). I have both positive and negative pieces (depicted here). I scan all of these to see the pattern, faint impressions of a wider segment (as seen in photo 6 ), and in this particular specimen noted the shiny black cracks and creases surrounding the fossil. I see this very commonly in shale (and my understanding is it reflects rapid cooling of heated material?). In addition however, I saw what simply appeared to be conglomerations of, for lack of a better term, "worms" (Circled in blue in photo 2 and red in photo 6). Now stay with me on this one! Under microscopic evaluation numerous ''nematode" shaped objects adjacent to the spine are present, measuring 0.3-0.8mm in length are noted. Most are broken but there are some mostly intact. Several demonstrate fine "annelid" rings, (denoted by arrows) but I don't think these are annelids? At first I thought the preservation was too good to be real, but I have denoted numerous impressions in the shapes of worms, even to the point of the "rings". In reviewing nematode and annelid taxa, I don't see any mouthparts to make these polychaetes, and found reference to "ringed" nematodes. I hope someone can confirm or tell me if these are something else. I have placed circles (blue and red) around the groups, and arrows on salient features of impressions and the worms themselves. Also labeled a couple more intact individuals with an "N", but most are broken. If this is a reasonable observation, then this is one of the coolest things I have ever found!!!!! Fingers crossed I am on the right track!!!....Worst case, it is a plant piece with adjacent plant nematodes, which are very common nowadays and worst worst case, I am totally off track . There are 13 photos, with some seemingly one image but if you look close, they are separate if that helps. as always, thanks all!!! Have fun with these and let me know!! Bone
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