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Found 3 results

  1. 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
  2. Genicularia vertebralis bodies are formed of ringed segments. Worms’ soft bodies generally don’t fossilise, though traces of worms do fossilise. These are pieces of the calcareous tubes secreted by the marine worms. And I've posted a few topics on Genicularia here on TFF over the year's. I'm now looking more into the variations of tubes you can find, so I thought you would like to see a few. Name: Genicularia vertibralis Age: Oxford Clay, Jurassic Location Found: Peterborough, United Kingdom
  3. Hollow gut helps define annelid like creatures from over 500 million years ago. https://www.livescience.com/oldest-guts-fossilized-primordial-creature.html
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