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Showing results for tags 'cephalopod'.
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Nautiloid? And what species would it be? (Solved also No soft tissue)
Samurai posted a topic in Fossil ID
Timer period: Pennsylvanian Location: Missouri Formation: Not exactly sure. Found in an abandoned rock pile containing limestone from the Iola Limestone Still it is a possibility it came from limestone from the Upper Winterset limestone. Hello! I found this nautiloid a long time ago and it was too heavy for me to carry the chunk of limestone that contained it, but before I left I got a few pictures of the specimen! Once I observed the photo a few weeks later I had the biggest regret of my life as it might contain an impression of soft tissue! I don't know If my mind is playing tricks on me but I think it might contain soft tissue. The thought is driving me crazy since I am always doubtful when I find fossils like these and due to my own lack of experience. Can anyone confirm if it does contain soft tissue? Is this a tentacle? or my imagination? Here are photos I edited in photoshop in order to see if I can make the features more visible (Above) Added more saturation and darkened (above) Added saturation and brightened the image I would like to note I have returned to the area but I have had no luck in finding it again and these are the clearest images I could obtain and I apologize for the blurriness Here are the images in their natural file size and some additional images: https://imgur.com/a/80wzODc If possible I would also love to know its species but I find that unlikely since it is bisected and poorly preserved shell wise..jpg.fe7c1c9905de2fc9239e5bdafd457f24.jpg)
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Around 2in or 5.08 cm or 0.051 meters
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I found this intriguing rock in Northwest Arkansas, in the Bloyd Formation I believe (carboniferous). It really looks like a steinkern to me, but I've only found limestone steinkerns before, hence my doubts. It's approx. 3" x 2"
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I was combing a beach on the southern shore of Lake Ontario for fossils when I found these. The surrounding rocks are Ordovician and contain mainly crinoids and branching corals. I found these two in the water a few feet off of the shore. They look like cephalopods to me, based on the segmentation and shape, and I have seen a nautiloid fossil that was found there a few days ago, but I don't know what kind of cephalopod specifically. I thought the first one might be a crinoid stem except that it tapers off slightly.
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From the album: Middle Devonian in Central New York
Michelinoceras telamon Middle Devonian Hamilton Group Moscow Formation Windom Shale Deep Springs Road Lebanon, New York Collected 7/18/20 -
From the album: Middle Devonian in Central New York
Spyroceras nuntium Middle Devonian Hamilton Group Moscow Formation Windom Shale Deep Springs Road Lebanon, New York Collected 7/18/20 -
From the album: Middle Devonian in Central New York
Agoniatites vanuxemi Middle Devonian Hamilton Group Moscow Formation Windom Shale Deep Springs Road Lebanon, New York Collected 7/18/20© Owen Yonkin 2020
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Howdy folks, Having trouble ID’ing this fossil. Im fairly certain it’s a cephalopod but I haven’t had much luck finding an ID. It’s of unknown origin but was found in Texas. It’s a creek fossil basically. I believe this is the side but I’m not certain. No finishing work has been done other than rinse and nylon brush. Opposite side with view of back Bottom?
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Few months back my girlfriend and I stumbled upon a nice deposit of Belemnites in a new area we were exploring, some examples better then others. We decided to make a little art piece to display in the house of the epic afternoon we had! Here is our Belemnite sun. Let us know what you think!
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So most of what I find is Metacoceras or Pseudorthoceras, two very common cephalopods locally. I've found a few Solenochilus, but they are different enough that I know what I found right away. This specimen was discovered as a body chamber. I thought Metacoceras, because, why not? Anything of this shape usually is. After some moderate prep, I revealed some more body chamber, but not any suture marks. The venter is oddly shaped as well, with a shallow U shape. It might be crushed, so I didn't pay it too much mind. I also discovered that the body chamber is much larger than any Metacoceras specimen I have found to date. In viewing the paper A NAUTILOID CEPHALOPOD FAUNA FROM THE PENNSYLVANIAN WINTERSET LIMESTONE OF JACKSON COUNTY, MISSOURI (full paper), I found plate 5 which features Domatoceras. They are known to exist here, but I've never found anything definitive. Here is the plate from the article: Here is a Metacoceras (CG-0071) on the left, and the specimen in question (CG-0068) on the right. Here is the venter of CG-0068 showing the two ridges marked with arrows. I feel these are similar to the ridges shown in Figure 2 of Plate 5 And that is that. Any cephalopod people have an opinion? I could prep it more, it's just at the labor intensive micro prepping state right now with solid cement like limestone overlaying it. One more photo of it for some additional context:
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How do you distinguish between tentaculites and orthoconic cephalopod fossils?
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I found a key to figure out a species of Solenochilus, and I would like to attempt to create a visual guide of the differences in the key. Usually it's a A/B situation. While it's clearly written, I'm still having some trouble figuring out what the difference is. So to start: Suture with ventral saddle. Suture with ventral lobe. I've found this, but it seems like this type of suture has both: Solenochilus has an exposed siphuncle, so the middle (venter) suture is usually interrupted by this. It's also usually straight. I have another 11-14 measurements aside from this first one. Help Update: This is the entire guide for those curious: https://docs.google.com/document/d/1hvqE3_MH0ke0XKCPgL2YeOaddCsIEOU5uOQyZxypCqU/edit?usp=sharing
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Hi! This fossil was found in Middle Tennessee. I have asked a few people what they think it is and their answers have been straight shelled cephalopod and internal structure of a belemnite (which is basically the same, isn’t it)? What do you think? If it is an internal structure of the belemnite, is it the phragmocone? Thank you for your help!
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Hi everyone. The other day I found this interesting impression in a rock. When I first saw it, I noticed that it looked similar to the sutures inside a cephalopod shell, but I thought it may have been wishful thinking and was probably something else. I took it home and asked on Reddit, and another user also said that they believed it was probably a nautiloid shell. So, I'm coming here for final verification. Is this a nautiloid shell? The fossil was found in northwest Michigan, along Lake Michigan. Thanks in advance!
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Hunting the Mazon Creek last weekend, my wife found this piece in the creek while hunting for Mazon Creek Fossils. What do you think ?? Any help appreciated !! Thanks for checking it out !! Phil
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Last year while on a fishing trip in Ithaca, NY I found this as well as some brachiopods in a small outcrop of shale along a stream. I’m pretty sure it’s Devonian in age but I haven’t been able to identify the species.
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I found this steinkern in the Maastrichtian, Peedee Form. of SE North Carolina. It is 5 inches long, 2 1/2 inches wide. Any ideas ? Thanks
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So I found both of these specimens a while back and just assumed it was some sort of cephalopod, but I’m not sure what kind. They were both found in the same area in west Michigan. Any information on these would be really helpful, thank you!
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Ordovician inverts are not my specialty, and thus I have a few that I would appreciate some help narrowing down the species on. The first three are from the Upper Ordovician Platteville Group (Mifflin Member I think). 1) A large cephalopod section. 2) What I think is a bivalve steinkern. Not sure if a species can be ascertained. 3) A tiny trilo pygidium. 4) This last one is from the Upper Ordovician Maquoketa Group. My guess is Eochonetes? Any thoughts @Tidgy's Dad? Thanks for any help.
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Endoceras proteiforme, found in the Humber river area. Late Ordovician, Georgian Bay formation, Toronto, Ontario. Length is approximately 35 cm long with a nickel shown. This specimen is a portion of the whole fossil that is still to be excavated (it's just so difficult to dig out) and the remaining body of this thing is still there at the site where I got this.© (©)
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I was taking pics of my Lake Jacksboro finds and came across what I thought was a regular cephalopod, orthoceras or somesuch, but on closer inspection, it does not have the chambers like all the others. It really looks more like a belemnite, but I am pretty sure those did not exist in the Pennsylvanian era? Correct me if wrong please! I then thought it was an ehinoid spine, but there is a distinct siphuncle opening on the end, (sorry for the pic, was the best I could do). So does anyone know the proper ID for this? Thanks in advance! Measurement is in inches. another small orthocone I found...with obvious chambers
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This is one of several features (will be 3 posts) in a limestone/dolostone matrix, from loose rock in a river, presumably carried south by the glaciers from the limestone bedrock further north. Pivabiska River 20 km north of Hearst, Northern Ontario, Canada. These features were INSIDE soft chalky dolostone that I removed with several vinegar baths and much rubbing; these features were not exposed to weathering. So my Q is, What caused the parallel grooves? What made the lattice-like inside? I've been told these are chert concretions, but could they be chert-ized fossils? Another post to come...
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This is one of several features I uncovered in a limestone/dolostone loose rock in a river. Only the "gingko leaf" end of the worm-like feature was exposed: the "worm" was enclosed in soft chalky dolostone that I removed with vinegar baths and much rubbing - so the "worm" had not been subject to weathering. From the Pivabiska River, 20 km north of Hearst, Northern Ontario, Canada, presumably carried south by glaciers from limestone bedrock farther north. I've been told it is a chert concretion, but could it be a chert-ified fossil? Q: If it's not a fossil and just concretion, how did the parallel grooves form? (The other features have parallel grooves too).
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This is the 3rd post of features from a limetone/dolostone rock, found loose in a river, presumably carried south from the limestone bedrock further north. If this is just chert concretion, not a fossil, then Q How did the parallel grooves form? The grooves in this feature had been emclosed in soft chalky dolostone material until I removed it with vinegar baths and much rubbing, so were not caused by weathering and are not glacial striae. And last, this is one of several bonelike features in this rock, that I understand are just chert, but the structure of the end looks bone-like to me. It was seeing these bone-like features sticking out of a normal limestone rock that caused me to soak the rock in several vinegar baths and keeping rubbing and brushing, which exposed all the small features with parallel grooves in this 3-post post.
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Leicester Pyrite Member. This layer between the Windom and the Geneseo black shale represents a sea of death. I find very few types of fossils in this hard to process layer of solid pyrite. Well preserved cephalopods and Placoderm armor (Placodermi is a class of armored prehistoric fish) are the most common fossils found. This very thin horizon can be easily found in the outcrop if you just look for rust dripping down and staining the grey shales below this pyrite layer. Every year or two, a piece of Leicester Pyrite will fall from its position high up in the outcrop and slide down to the creeks edge. It takes a lot of work to process the pyrite for fossils. Every blow with your hammer delivers the strong smell of sulfur and a ton of sparks. The reward for all this patience and hard work are fossils preserved in brilliant fools gold. This unit is also the only rocks in my area that routinely contain the armor of Placoderm fish. Click this link for a detailed description of this unusual formation - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.835.6976&rep=rep1&type=pdf&fbclid=IwAR0qdFymJq-Hd1_SqU3j3yDw5Trl0ih_KohTv-26Du3b1m9g9s2IYKlW0Xc
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