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David Clark posted a new activity comment 3 years, 11 months ago
3 years, 11 months ago3 years, 11 months agoWhat an interesting specimen! Jimbacrinus is a Permian crinoid only found in Australia. I think this may be a columnal or stem that was infected and bulged. This specimen has no obvious small tegmen plates (top of the calyx) or anal tube. It’s also curious if it only has 4 holes on the sides. If they were arms, it’s usually in multiples of 5. The…[Read more]
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David Clark posted a new activity comment 3 years, 11 months ago
3 years, 11 months ago3 years, 11 months agoI don’t think this is an Acanthocrinus. That’s a Devonian genus found in the Hunsruck slate and New York exposures. This looks like a free swimming crinoid, Saccocoma, which is often found in the Solnhofen limestone. The pictures look like the positive and negative pieces. Very nice specimen!
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David Clark joined the group University of Michigan Museum of Paleontology 4 years, 8 months ago
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David Clark posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoI’m sorry. I thought you were questioning the genus/species. We have quite a few Dolotacrinus species in Alpena and Arkona and I missed your “family” comment.
I think you’re correct about Dolatocrinidae. I’ll have to look at Davey’s paper to confirm.
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David Clark posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoThis is a Clarkeocrinus troosti, named for John Clarke, the first director of the New York State Museum. It’s a common crinoid from the Devonian of New York. Winifred Goldring’s memoir is a free download and great resource for New York crinoids. The NYSM website has the free pdf.
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Yeah! I agree with your species identification but was working to fill in the family assignment as you have it blank in the classification scheme.
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I’m sorry. I thought you were questioning the genus/species. We have quite a few Dolotacrinus species in Alpena and Arkona and I missed your “family” comment.
I think you’re correct about Dolatocrinidae. I’ll have to look at Davey’s paper to confirm.
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No worries! It’s on the taxonomists for naming things so similarly, it gets really confusing!
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David Clark posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoThis is actually the same specimen. As found in the field and after prep.
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Sam Ocon and David Clark are now friends 4 years, 8 months ago
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David Clark posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoLooks like I did have a typo! The formation has changed from Osgood to Massie, so I’ll change that too. I’m not aware of any revisions and I think it fits into the calymene family. I know calymene in general is in need of a massive revision.
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Yes, from what I understand Calymene is a huge garbage can of trilobites. It sounds like a big undertaking! I’ll stick with the blastoids, for now =D
Thank you for getting this updated! If you get a chance to take another photo at some point, adding in a scale would immediate push this to ‘research grade’ so it can be searchable on iDigBio’s data…[Read more]
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David Clark joined the group Paleoart Appreciation 4 years, 9 months ago
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David Clark posted a new activity comment 4 years, 9 months ago
4 years, 9 months ago4 years, 9 months agoHello Jenn – These are two specimens. I think I have 4-5 total. I should probably create new entries with better pictures. I entered these a few years ago and the picture quality isn’t the best.
I’ve heard of Harold Beaver’s study, but I don’t think I have a copy. I have seen O’Malley & Ausich crinoid biomarkers. This is the only locality I know…[Read more]
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David Clark joined the group Bookworms 5 years, 3 months ago
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David Clark commented on Jennifer Bauer‘s Fossil #026232 5 years, 4 months ago
5 years, 4 months ago5 years, 4 months agoPartridge point is the locality. The formation is Thunder Bay Limestone. I love that site.
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Crystal Edmonds and David Clark are now friends 5 years, 4 months ago
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Jennifer Bauer and David Clark are now friends 5 years, 4 months ago
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David Clark posted a new activity comment 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months agoExactly. I have quite a few specimens from that locality. Mark Paladas sells them at MAPS every year.
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David Clark uploaded a new image to Fossil #014620 7 years, 6 months ago
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David Clark posted a new specimen. 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months agoDavid Clark has contributed specimen mFeM 50719 to myFOSSIL!
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Hi, @david-clark – these are two separate specimens, is that correct? If you are interested, we can separate them into two occurrences – this will allow them to be migrated to iDigBio for others to find during their searches. You could also update the geochron to include Mississippian, I think the age is Visean but you’ll have to double check.…[Read more]
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Hello Jenn – These are two specimens. I think I have 4-5 total. I should probably create new entries with better pictures. I entered these a few years ago and the picture quality isn’t the best.
I’ve heard of Harold Beaver’s study, but I don’t think I have a copy. I have seen O’Malley & Ausich crinoid biomarkers. This is the only locality I know…[Read more]
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That’s excellent you have so many! I think most of his specimens are still hidden away at Baylor rather than in their proper homes. I send you a direct message with a link to my Dropbox with some of his papers!
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David Clark commented on their own Fossil #014620 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months agoBlastoid with preserved color patterns and brachioles.
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@david-clark David, are the dark and light horizontal bands the color pattern? – Jack
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Exactly. I have quite a few specimens from that locality. Mark Paladas sells them at MAPS every year.
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David Clark updated their own Fossil #014620 7 years, 6 months ago
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David Clark uploaded a new image to Fossil #014620 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months ago - Load More