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Showing results for tags 'edriophus'.
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References: Timothy Paton, Carlton Elliot Brett (2019) Revised stratigraphy of the middle Simcoe Group (Ordovician, upper Sandbian-Katian) in its type area: an integrated approach. Canadian Journal of Earth Science. DOI: 10.1139/cjes-2018-0023 Kammer TW, Sumrall CD, Zamora S, Ausich WI, Deline B (2013) Oral Region Homologies in Paleozoic Crinoids and Other Plesiomorphic Pentaradial Echinoderms. PLoS ONE 8(11): e77989. doi:10.1371/journal.pone.0077989
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- bobcaygeon formation
- brechin
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From the album: Invertebrates
Edriophus levis BATHER, 1914 Ordovician Bobcaygeon Formation Brechin Ontario Canada-
- bobcaygeon
- brechin
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Well I was out hunting the Ordovician on Saturday and as it turns out I had a pretty awesome day. I found a plate with 5 flexicalymene trilos on it all essentially complete , a cyclocystoid complete with central plates, a partial piece of a cleiocrinus, a pleurocystites, a complete prone ceraurus with at least 5 small crinoid calyx on the plate, a bit mangled enrolled isotelus, a calyptalaux . You can see that fossils when they are found in the field are often nothing special to look at. Note that in the field I always circle what I am interested in with black sharpie marker (never leave home without one ) Many times I look at what I brought home weeks later and it really helps to know what caused me t carry it back to the car with me...... I also write the location and the date on the back because it is often weeks or months before I get to looking at them after getting home. However what got me excited was the rock 2nd from the top of this group but one that had just the faintest sign that it had something that looked like an echinoderm in it. Not much to look at and barely noticeable in the filed.All the pictures that follow are of approximately the same orientation as the original unprepped picture. Here it is under better light and closer up. After a while prepping I realized that I had something special Getting even more special Starting to look quite cool All done and the first ever Edriophus levis (Bather) for me and it is essentially complete. It is about 1 1/2 inches across. There were a few found a few years back but this is the first I have seen in quite a while. Not exactly common......`These are quite rare and are found in both the Bob Caygeon and the verulam formations of Ontario. Note that the arms curve clockwise which is one of the distinguishing features , Lebitodiscus curves counterclockwise. It would also appear that the arms go further down the sides than Foerstedicus. The anus is composed of 9 to 15 triangular plates which you can see broken up on this specimen. Really had no clue what it was when I found it in the field. I thought it was going to most likely be a crinoid calyx... Was a very nice surprise. As you can see from the last picture the specimen is sitting free on its original matrix. The reverse has also been prepped and is hollow with some plates visible. Unfortunately I did not take a picture of the underside yet. Maybe will try to do when I get a chance. But have a lot of really neat material under prep right now ... have spent 10 hours a day prepping material in the last few days ... If I can keep up the pace for a few weeks I can start to get my head above water.......
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- edrioasteroid
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