Kikokuryu Posted May 3, 2023 Share Posted May 3, 2023 I purchased this as a supposed Silurian Megalograptus from Yunnan a while back. The seller gave me additional information that it came from the Devonian Cuifengshan Formation in Qujing, Yunnan, China. However, the genus Megalograptus is Ordovician in age. I'm not really familiar with eurypterids, so maybe it's not even a sea scorpion. It certainly looks like some kind of invertebrate though. But maybe it's just indeterminate debris. Image 1 - Measurement is in millimeters. Image 2 Image 3 Image 4 Link to comment Share on other sites More sharing options...
Mahnmut Posted May 3, 2023 Share Posted May 3, 2023 Hi Kikokuryu, I find it difficult to tell what I see here- the reddish brown colour matches some eurypterid fossils, the morphology could in my eyes be explained as well as hackle fringes. Maybe @Dean Ruocco has an idea? Best Regards, J 1 Try to learn something about everything and everything about something Thomas Henry Huxley Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted May 3, 2023 Share Posted May 3, 2023 Unfortunately, I'm afraid this might be a slickenside, a purely geological feature. 1 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
Kikokuryu Posted May 3, 2023 Author Share Posted May 3, 2023 59 minutes ago, pachy-pleuro-whatnot-odon said: Unfortunately, I'm afraid this might be a slickenside, a purely geological feature. Ah well, you win some, you lose some. Inverts have not been easy. At the very least, I'm more confident that these from Kunming, Yunnan are actual Cambrian animals. Probably a radiodont like Houcaris or cf. Anomalocaris? 4 Link to comment Share on other sites More sharing options...
Dean Ruocco Posted May 3, 2023 Share Posted May 3, 2023 18 hours ago, Kikokuryu said: I purchased this as a supposed Silurian Megalograptus from Yunnan a while back. The seller gave me additional information that it came from the Devonian Cuifengshan Formation in Qujing, Yunnan, China. However, the genus Megalograptus is Ordovician in age. I'm not really familiar with eurypterids, so maybe it's not even a sea scorpion. It certainly looks like some kind of invertebrate though. But maybe it's just indeterminate debris. Image 1 - Measurement is in millimeters. Image 2 Image 3 Image 4 I bought one of these too, the seller has them miss labeled as mine is definitely a Eurypterid but belongs to some sort of Pterygotid not any megalograptids. Speaking of which I’ll post my collection of them tonight. Link to comment Share on other sites More sharing options...
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