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Hi everyone, This fossil has always bothered me because of the way it felt in terms of weight and the cleanliness of the cut (there looks to have been some stabilizer added from the side, which I guess helps the case for authenticity). I only have one other fossil - what appears to be what was a very commonly sold Nemiana simplex - from a nearby region with a similar geology, and I could very well be wrong because it is indeed quite similar, albeit lighter with a more uniform grain. Since they're both Ediacaran in age and commercially not rare per se, I've always wondered if this Kimberella was legit given a fluctuating price tag that has been quite high in the past but seems to have levelled out in the mid range. As someone who once taught a diversity of life course, I am an absolute sucker for fossil items that include key moments in history, as well as evolutionary transitions. I've included pictures of the Kimberella in question, as well as a couple of items I place it next to because I'm a giant nerd and I like to imagine that this is the footprint left by some sort of mono- or poly-placophoran ("chitons") 600 million years ago. I wish I had some "smell shelly fauna" or traces left by an Aplacophoran to illustrate the molluscan "root" but alas this is it for now. The orange fossil shell is of a monoplacophoran named Proplina grandis (Gasconade formation, Missouri, Lower Ordovician) - unconcerned about its provenance - and a modern chiton from the Philippines. I know for a fact this quite popular seller misidentified a fossil fish sold to me as a madagascan coelacanth very, very early in my building of a fossil collection; this is also a reason I'd like to know if the provenance is legitimate; I've been hesitant to deal with them since and passed on many fossils as a result I'd probably only look to add a sea pen-like fossil from the region - unlikely due to the hefty price tag and commercial rarity - but I'd like to learn more about what to look out for nonetheless. As always, thanks for any insights the community might be able to provide! Cheers Marcus p.s. And happy fathers day!
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I just had the opportunity to purchase a kimberella fossil for a good price but backed out at the last second because the seller was based in Russia and I wasn't sure about the legality surrounding White Sea specimens being imported to Canada where I live. I'm always wary of fossils being sold out of China and Russia. Has anyone purchased White Sea specimens directly from Russia? And what is the legality of them? It's hard to find a direct answer online.
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From the album: Invertebrates
Kimberella quadrata Wade, 1972 Ediacaran Onega Island Arkhangelsk White sea region Russia Dorsal view according Micha L. Rieser (copyright holder, Wikipedia) a: striae b: crenellated zone c: proximal ridge d: distal ridge e: anterior knoll f: lobe g: medial depressionor or midline ridge-
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Wikipedia: "The slug-like organism fed by scratching the microbial surface on which it dwelt in a manner similar to the gastropods, although its affinity with this group is contentious." Reference reconstruction: Copyright holder Micha L. Rieser (Wikipedia) Dorsal view of Kimberella. a ) striae b ) crenellated zone c ) proximal ridge d ) distal ridge e ) anterior knoll f ) lobe g ) medial depressionor or midline ridge Lit. Links: https://www.researchgate.net/publication/225327295_New_reconstruction_of_Kimberella_problematic_Vendian_Metazoan https://www.researchgate.net/publication/260191577_Guidebook_of_the_field_paleontological_excursion_Zimnie_Gory_-_locality_of_the_Vendian_Ediacaran_soft-bodied_animals Lit.: A.Yu. Ivantsov (2009) A New Reconstruction of Kimberella, a Problematic Vendian Metazoan ISSN 0031-0301, Paleontological Journal, 2009, Vol. 43, No. 6, pp. 601–611. © Pleiades Publishing, Ltd., 2009. Original Russian Text published in Paleontologicheskii Zhurnal, 2009, No. 6, pp. 3–12.
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Oldest Known Macroscopic Skeletal Organism Found (Central Urals, Russia)
Oxytropidoceras posted a topic in Fossil News
Oldest Known Macroscopic Skeletal Organism Was Masquerading as Fossilized Feces. Some researchers initially dismissed the remains of Palaeopascichnus lineari as teeny turds from a bygone era SmithsonianCom, https://www.smithsonianmag.com/smartnews-history-archaeology/oldest-known-macroscopic-skeletal-organism-was-masquerading-fossilized-feces-180970509/ Petrified Chains of 'Poop' Turn Out to Be One of Earth's Oldest Skeletons By Stephanie Pappas, Live Science, October 9, 2018 https://www.livescience.com/63783-mystery-fossil-is-oldest-exoskeleton.html Kolesnikov, A.V., Rogov, V.I., Bykova, N.V., Danelian, T., Clausen, S., Maslov, A.V. and Grazhdankin, D.V., 2018. The oldest skeletal macroscopic organism Palaeopascichnus linearis. Precambrian Research, 316, pp.24-37. https://www.sciencedirect.com/science/article/pii/S0301926817307052 http://www.ipgg.sbras.ru/ru/science/publications/publ-the-oldest-skeletal-macroscopic-organism-palaeopascichnus-047874 Yours, Paul H. -
References: Andrey Ivantsov et al.: Guidebook of the field paleontological excursion: Zimnie Gory - locality of the Vendian (Ediacaran) soft-bodied animals. link
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