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Showing results for tags 'edrioasteroid'.
Found 19 results
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I found this the other day. I am wondering if it is, and the best way to clean it up.
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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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- amplexopora
- amplexopora septosa
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Back in 2020 I went with a university paleontology class to a quarry in Alabama where the Mississippian Bangor Formation is exposed. Much of the formation is massive pure limestone, which is used for cement production. However at the top of the quarry there are thin limestone layers separated by shale. As this is unsuitable for cement, it is stripped off and discarded adjacent to the quarry, and we are allowed to search this. Crinoids and blastoids are common finds, and other fossils including chondrichthyans ("shark" teeth and spines) are found occasionally. On the 2020 trip I found a partial large edrioasteroid, the first the professor had seen and they had been leading trips to the quarry for many years. (BTW edrioasteroids are known from other Bangor exposures, just not this quarry). Last weekend I was trimming up some fossils with a tile saw to make space in the cabinet. The edrioasteroid was still on a fairly big slab partly wrapped in aluminum foil. The back had a centimeter or so layer of dried mud and broken down shale covering it. Before I started to cut up the slab I decided to clean off the back, in part to make cutting less messy, and also just to make sure there wasn't anything interesting on that side. In the past I have cut right through good fossils because I didn't know that they were there. As I took a toothbrush to the mud and broken down shale, a bit of black appeared. This was interesting, as about the only thing in these rocks that is black are the fish teeth. A bit more scrubbing, and a beautiful Chomatodus tooth appeared, the best I have seen personally. There is a small bit (maybe ~2 mm) missing on one end, but otherwise it's all there and perfectly exposed. The taxonomy of these fish is quite confused, and even experts are declining to put species names on specimens until the genus is properly revised, so I am labeling this specimen as Chomatodus sp. Just for fun, I will be entering this one for Fossil of the Month. The edrioasteroid (Hypsiclavus huntsvillensis): The tooth (Chomatodus sp):
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- alabama
- bangor formation
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From the album: Nautiloid’s Echinoderm Collection
Edriophus levis from the Bobcaygeon Formation of Brechin, Ontario. This was a gift from a fellow fossil collector.© Owen Yonkin 2022
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Found this yesterday in Mason County, Kentucky in the general vicinity of Maysville where Ordovician limestone (Bellevue Formation?) is exposed in the roadcuts. Not an expert but hunted enough to immediately appreciate the rarity of the find. After some preliminary research and a tentative identification (Carneyella ulrichi) I seek an expert review and confirmation/correction. These animals seem to be sufficiently rare that a firm ID shouldn't be left up to an avowed un-expert ... who knows little about the differentiating characteristics of edrioasteroids (or even echinoderms) to do more than "guess by association." @Tidgy's Dadhas posted an Ordovician edrioasteroid for ID and I am hoping the experts on the Forum will offer a view on this animal too (and because I think you all will find it cool!) Thank you in advance for your help. BTW - I am doing virtual cartwheels of joy IRL I was, literally, dancing by the side of the highway! Yes, that was me if you witnessed it!
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- echinoderm
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Here are two Edrioasteroids from the Verulam Fm. (Ordovician) near Brechin, Ontario, Canada. The first one might be Isorophusella? (specimen is 1 cm in diameter). The second one may not have enough present for ID: @crinus
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Hi again! This past summer I purchased a small rock with 4 edrioasteroids on it, and I was hoping to get your help in identifying them. The seller said that the rock is from the Upper Ordovician Verulam Formation in Gamebridge, Ontario, and he/she said that the following 3 species of edrioasteroid are on the rock: Cryptogoleus chapmani Isorophusella incondita Belochthus orthokolus Can anyone tell me the specific identity of each edrioasteroid? Thanks so much for your help! Monica Photo of the whole rock: The two edrioasteroids on the right side of the rock - one is quite big (we'll call it Specimen #1) and the other is quite small (we'll call is Specimen #2): The edrioasteroid in the middle of the rock (we'll call it Specimen #3): The edrioasteroid on the left side of the rock (we'll call is Specimen #4):
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From the album: Echinoderm Collection
Belochthus orthokolus (Bell, 1976). Found in the Verulam formation, Gamebridge, Ontario, Canada. Middle Ordovician. Obtained online as a purchase. The edrio is about 1.8 cm long.- 1 comment
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My brother found this object in a park in Hamilton New Jersey. The rock from this area is mostly from the Jurassic and Cretaceous, but there is a small bit of rock from the Cambrian. This is the second category of disc-shaped fossil that I discussed in the first thread. There are several separate objects within the small rock, which looks somewhat similar. They are different from all of the other objects, which turned out to be imprints from crinoid stems, because they have 5 or less sections within the disk. One of my guesses is that they are some kind edrioasteroid (I'm probably wrong). The first photo shows what I think are the different samples. I will upload more photos soon. I hope that you can identify any of the tiny objects. Thank you in advance.
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I took my daughters for a short fossil hunt at Trammel Fossil Park. It was about 33 degrees out so they got cold and went back to the car fairly quickly. I would say it was about a 45-minute hunt. They have the formation levels marked at the Fossil Park so I would say I was at the Miamitown level when I found what I think is an Isorophus cincinnatiensis edrioasteroid. Attached are some photos including one next to a 1-inch cube. I also have a small cheap in microscope attachment for my my phone and took a couple pictures of the peripheral rim.
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Made the trip over the weekend. Will post more when I get home. I will start out with this find. Large edrioasteroid species sophusella incondita found at JD Quarry in Ontario Canada Sunday morning. 9/24/17. Ordovician.
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Hello. I'm attaching two photos: #1) an image of a "Rare Primitive Echinoderm (Edrioasteroid) from the Upper Ordovician of Ontario, Canada," from the following fossil website: https://www.fossils-uk.com/product/new-rare-primitive-echinoderm-edrioasteroid-from-the-upper-ordovician-of-ontario-canada-sku0918-isorophuella-incondita/ #2) a fossil that I found that looks similar and is about the same size as the Edrioasteroid from #1. Is it possible that my specimen (#2) is this Edrioasteroid? Thanks for any assistance! Camille
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From the album: Northern's inverts
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From the album: Northern's inverts
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From the album: Northern's inverts
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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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Last November, my wife and I went collecting in northern Kentucky. We had visted a Richmondian site and were on our way back, when we happened to see a random road cut and decided to pull over and have a look. It was composed of blocky limestone rich with Vinlandostrophia ponderosa, and turned out to be part of the Bellvue Mbr. of the Grant Lake Fm. Within about 10-15 minutes, my wife found her first cyclocystoid, and I found my first edrioasteroid. As far as rarity, I'd say she definitely outdid me! These fossils got our hopes up for more, but the rest of the day plus a second trip with friends failed to find any additional echinoderms. My wife's cyclocystoid measures about 12 mm in diameter. We don't know the species yet, but we are planning to meet with a paleontologist in Cincinnati soon to ID it. My edrioasteroid is Isorophus cincinnatiensis, measures about 17 mm in diameter, and is upside down and partially broken. Jack Kallmeyer of the Dry Dredgers suggested it was likely attached to a clam during life, which then dissolved away after burial, leaving the underside exposed.
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Sometimes you get a very pleasant surprise when you get your finds home and start prepping. I was very fortunate to find two relatively complete Amecystis laevis this Saturday October 31, 2015 up at the JD Quarry near Lake Simcoe, Ontario , Canada. They most likely came out of the very top part of the BobCaygeon formation as they were both found in a recently created pile and not in situ. If not it was from the very bottom of the Verulam This picture because of the lighting used came out a bit blue. I am not the best photographer around. The specimen is on an 85mm * 66mm matrix and is 79 mm long from tip of arm to tip of tail (about 3.1 inches) . The theca on the amecystis is 17mm wide by 22 mm long. The Amecystis is a dorsal orientation. The edrio is approximately 6 mm in diameter. I believe this to be a Amecytis laevis (Raymond) by the way Thanks for the correction Kevin (Northern Sharks) there are definitely no pore rhombohedrons on this specimen. It is a shame that the Amecystis and the edrio both have some slight damage to them from the quarry blasting. But they are still very good specimens. The amecystis is fairly well inflated and nicely colored. Here is a better picture showing the true coloring. But to my surprise it has a very nice attached travelling companion in a edrioasteroid which I believe to be an Isorophusella incondita. What makes this super interesting and probably quite rare is the fact that the edrio is attached to the amecystis and may well have been there when the amecystis was alive. I wonder if anyone else has ever come across this particular association. Edrios are often found attached to brachiopods in this locality. This was prepped using 40 micron dolomite under a zoom scope at 22 PSI using a Comco .018 high precision nozzle on a Comco air abrasion unit.
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A couple years ago, my father picked up an Edrioaster sp. in the Galena Formation of Southeast Minnesota. What makes this specimen interesting is that it was preserved fully inflated and showing the holdfast and the outline of the structure it was attached to. We got the specimen back at MAPS this past year after having it prepped and I finally took some photos of it. I just hope I got the genus ID correct. Edrioaster sp. Galena Formation, Prosser Member Ordovician, Trentonian Southeast Minnesota Anotated Feel free to post photos of your Edrioasteroids!
