Collector9658 Posted July 24 Share Posted July 24 (edited) I collected this echinoderm part from Silurian Bainbridge Formation outcrops. There are two spike-like projections exposed, and two more that are buried in sediment. The rock unfortunately split in 2 pieces, and I noticed two other spike-like projections on the opposite side while glueing it. I thought it looked somewhat similar to an Ancyrocrinus holdfast, but the age is wrong and I haven't found them reported from here. I apologize for the poor quality photos, I will update with better quality ones when I relocate the specimen. Any clue if this is a holdfast indeed, and if so what crinoid it could belong to? Edited July 25 by Collector9658 Link to post Share on other sites
Fossildude19 Posted July 24 Share Posted July 24 I would say this is a holdfast, if I found it. 2 Link to post Share on other sites
Collector9658 Posted July 25 Author Share Posted July 25 12 minutes ago, Fossildude19 said: I would say this is a holdfast, if I found it. I thought so too, but I'm having issues with finding a type of Silurian crinoid with a similar grapnel holdfast like this. Link to post Share on other sites
Mochaccino Posted July 25 Share Posted July 25 Definitely crinoidal, could be holdfast or just a stem section. Those "spikes" could be from cirri. Hard to tell just from these photos. Can't help you with ID beyond that, as holdfasts/stems are usually hard to ID unless they are very unique/characteristic. 1 Link to post Share on other sites
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