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Showing results for tags 'spines'.
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From the album: My Echinoid Collection
Ova sp. Mykolaiv Sands, Fore-Carpathian Depression Middle Miocene (16-11 Ma) Gleboviti Locality, Roztocze Hills, Ivano-Frankivsk Oblast, Ukraine Acquired from online, August 2023 I had previously identified these as Schizaster sp., but I realized a short while later that the larger specimen only has two large gonopores, and while the one in matrix has an incomplete apical disc, it looks as if it may have those same two large gonopores. Therefore I'll consider them Ova sp. for now, the larger one seems to have the complete lateroanal fasciole from what little I can see. These come from the same beds that have plentiful spine-coated Echinocardium leopolitanum. One specimen has some spine preservation on the oral surface, while the other one in matrix has some spines along the anterior edge, as well as seemingly on much of the oral surface as well, based on a small crevice located in the sandstone that exposes some of them.-
- echinoid
- echinoidea
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Hello everyone! I have been picking through microfossils from the Whiskey Bridge locality on the Brazos River in Texas. I used the hydrogen peroxide technique to separate the fossils from the glauconite matrix, and I have spent hours at the microscope, picking through the material to find the really tiny stuff. Here are a few batches that I've separated... My reason for posting this in the identification section, however, is that I have been running across a large number of echinoderm fragments and spines... The largest of the fragments are approximately 8 millimeters across, while the longest of the spines are 6-8 millimeters. Does anyone have any information on echinoids from this locality? I'm sure others have run across these before. Any information is much appreciated! Daniel
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- crockett formation
- echinoderms
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this is a strange one, coming from devonian deposits from morocco. I have seen this long time ago, but forgot the name. And could not find it in the LEBRUN-Book Size is approx. 3 cm Found it in a box today and think, it will be necessary to do a little work on it next winter. For my opinion everything is original
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On Saturday I went fossil hunting with @Tales From the Shale in Utica, LaSalle County, Illinois! We drove for some time looking for roadcuts when we discovered an abandoned clay pit not too far away from the town itself. I learned later its rocks date to the Pennsylvanian period of the Carboniferous era. There were also a bunch of nodules there too, but mostly it was stark shale and Excello shale. We opened the shale rocks up and we found a massive amount of small fossil imprints. But we also found some likely Chondrichthyan spines which I was wondering if anyone could ID the genera? This first specimen I found after breaking open a large piece of Stark Shale. I asked @Tales From the Shale for an ID and he said it very likely a Listracanthus spine. Here is the specimen under a dissecting scope!!! The striations typically seen on chondrichthyans like Listracanthus or Cladodus are more visible here, but I'm a bit unsure if these could be matched to either of these genera?
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- carboniferous
- chondrichthyan
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From the album: Texas Echinoids, ERose
Update: Since I originally posted this image I now have fairly positive identifications for three of these and a good guess on the fourth. From top to bottom: The knurled large spine is Paracidaris? texanus (Whitney & Kellum) one of two known cidarids in the formation; The second is Pseudodiadema aguileria (Maldonado) and is recognized by its triangular cross section; The third is the unknown. It looks like spines on some Goniopygus but there are no large Goniopygus in this strata. It is more likely a scrobicular spine (https://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/glossary.jsp?begins=S&showImageID=164) from one of the cidarids, either Paracidaris or Balanocidaris; fourth is the spine of the Echinothurids of which we seem to only find plates and these rare tiny spines. They are known to have the reverse taper and a hoof-like distal end. Note that Bill Thompson (2016) has put the name Echinothuria mccallae on these but there are no known articulated specimens and his erection of this name is IMHO sketchy at best. All were collected by me at the same location from the echinoid marker bed (AKA microzone) at the base of Unit 2, Lower Member, Glen Rose Formation, Trinity Group (Albian) Comal County, Texas -
I recently discovered this in the Devonian Onondaga Formation of Ontario and am thinking it’s either a Placoderm or a Onychodontid based off the armour like texture which does not match any coral in the formation, their is also the presence of odd spine like structures. Any idea if it is one of these species?
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This block was on a pallet of what was called corkstone that i bought to use in a pond nearly 20 year's ago, I used the rest to border my koi pond but this one was too cool to pu into the water. i had it indoors for many year's but it got moved outdoors and developed a lot of moss, ,while it still looked cool i recently hit it with a pressure washer revealing more than had shown prior and since have become more curious about the center dis and cluster of spines. this morning I used a little sandblasting to erode the backside and this is what i have. I have no way to know were it came from,and suggestions? is it already too cool to mess with furthermore or do you think there's more to be seen?
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I have been told by a scientist that this belongs to a cockle but I'm having a very hard time seeing it as one. I have found several bivalves on line that have spines but can't find an exact match for the pattern on this thing. The thick section is a little over 5mm and the thin section is about 2mm. It does not slope down to 2mm it has steps in it, which I can't find on any bivalves on line. Also, the spines on all bivalves I've seen appear to fan out as they move from the rear (hinge area) to the thinner forward area but these spines are coming together at what appears to be the thinner area and fanning out at the thick section. Has anyone ever seen anything like this???
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Echinoid parts - Texas Pennsylvanian
Texas Fossil Hound posted a gallery image in Member Collections
From the album: Cartier's favoroite fossils
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I have this piece, which sadly I do not know much about, being that it was acquired at an estate sale and had no info. I have not been able to find something similar looking online, except for maybe a small section of teeth from a helicoprionid shark? The piece is about 6 x 7" and the teeth(?) are about 1/2" in length.
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- helicoprionid shark
- mosasaur
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Three productids with most of their spines intact, showing that they looked like hedgehogs. I haven't identified them further largely because I can't see the shells properly. (Edit: likely to be Echinoconchus or similar echinoconchid - see below) These are from a Brigantian (Mississippian) mudstone in NE England, Co.Durham. 1) About 6cm across 2) Interior brachial valve showing spines projecting around the edge from behind. About 3cm across. 3) about 4cm across:
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- brachiopod
- brigantian
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Here's probably the most interesting piece I came across this past summer .... It's provenance, in the Yukon Territory's northern Ogilvie Mtns., just a bit south of the Arctic Circle, is what might be described as an iconic Ordovician faunal assemblage, rich in large Gastropods, Orthocerid Nautiloids, large horn and tabulate corals and relatively few Brachiopods. Trilobites, however, seem to have been a bit player in this group ... Over many years, I've found only a half dozen partial trilobites at that exact spot. The other pygidia I've found are fairly conventional, similar to Pseudogygites in appearance. However, the Cephalons I've found there are strange, and appear to belong to another species altogether (I'll post images of these later...). This thing, with it's array of spines, does not seem to match anything else I've seen ... It's about 20mm wide X 10mm in height, while what's left of the spines add another 10mm. Anybody seen one of these?
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Hi all! Under the presumption these are echinoderm I've been searching for anatomical features, particularly disarticulated crinoid and archaeocidaris of which both are plentiful in the matrix. In my searching I've been unable to find anything that even remotely resembles these pieces. Any input is much appreciated. Plattsburg fm. - Hickory Creek sh. I attached a group photo of some of them I found, followed by 4 select specimens showing each side front and back. For scale, field of view is ~1cm. Group shot Front Back Front Back Front Back Front Back Thank you all!
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- anatomy
- echinoderm
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This came from a friend in Morocco and it seems very strange. I added a scale to hopefully help. Thanks.
- 12 replies
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- branchipod
- is it real
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Ive found this & other small fossils at ocean beach in San Francisco. Most look like sand dollars but this one has a foot w/clear metatarsals/phalanges & what looks like 3 vertabral columns or 3 portions of 1. Does anyone know what this is?
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From the album: Echinoidea from Calcários Apinhoados da Costa D'Arnes formation
Tiaromma sp with spines on oral view, Calcários Apinhoados da Costa D'Arnes formation, Upper Cenomanian, Portugal. 14 mm. -
From the album: Echinodermata
Pseudocidaris sp, Camadas de Alcobaça formation, Kimmeridgian, Portugal. Several spines 1.5-3 cm. -
From the album: Echinodermata
Stylocidaris affinis and Schizechinus serialis spines, Loco Formation, Lower Pliocene, Spain. 17 to 25 mm.-
- Schizechinus serialis
- spines
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