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Found 119 results

  1. Nautiloid

    Hello all, I don't know much about cephalopods and really could use your help. I found this small rock with the tiny nautiloid specimen in the banks of the Rock River in Ogle county, Illinois. The area's bedrock is Middle Ordovician (Mohawkian, Ancell Group). I believe it belongs to the order of the Actinoceridae. The "camerae" end in double pointed arches instead of a straight edge, just as Wikpedia's illustration shows in the 2nd pic below. What seems to be unusual in my specimen - can't find any photos of this anywhere - are the rounded camerae, vs the tightly lined-up straight banding on other specimens. (I'm not sure about the correct terminology...sorry). If I'm not totally off base, is there a chance to narrow down the ID further? Thanks in advance. General form of Actinocerid:
  2. 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.
  3. In my last fossil hunting trip to a late ordovician site in the Oslo field I found these 2 fossils. One with a small spiral form, size 1 cm in diameter, seems to be a gastropod, and the bigger one what seems to be a nautiloid with an unusual form, size about 7-8 cm long. Anyone seen something like these before? First the small gastropod or maybe it is a nautiloid too? A small part fell of, so one can see if it has a sihuncle or not, I took these photos of it with a microscope, the first most clear in the cross section: And here is the bigger nautiloid, with the (for me) unusual form:
  4. I found a nice Discoceras yesterday. A part of it is unfortunately destoyed by a vehicle. The stone is too big so I left it in the field. It is more difficult to take it out of the stone then with ammonites I guess. I also found this second speciemen which I do not know which family it is. Anyone have an idea? Size of the Discoceras is about 15cm in diameter, while the send is 5 cm long.
  5. Coral or nautiloid?

    I posted a picture 2 weeks ago of a fossil which it was disagreement about what it is. In the same stone I found several fossils which have the same or similar forms. I therefore ask again for opinions. First the same picture:
  6. A shrimp like animal?

    I m not sure if the fossil site I visited 2 weeks ago is silurian or ordovician yet, but the fossile is interesting. What can it be, a shrimp or a cephalopod? Anybody have an opinion? The size is 3,5-4 cm long. Thanks Martin
  7. Middle Pennsylvanian Nautiloid?

    I recently got to do some hunting in northern Missouri, Marmaton group and found a few large phosphatic concretions. Within one was this specimen that I am trying to identify. I am wondering if it looks like a Solenochilus sp. to anyone beside me? There may not be enough of the specimen present to determine a species ID, but I figured I'd take a shot for the sake of labeling. Thanks,
  8. Nautiloid?

    Hi guys. Looking for help on this one. Found it this weekend in a west central Indiana creek. Largely glacial till although this was found not far from an outcrop of bedrock (Early carb.) and the matrix of this specimen appears similar to the bedrock matrix. I’m thinking nautiloid. If so, thoughts on genus? Was thinking vestinautilus, but there appears to be more suture lines on this specimen then on the picture in my field guide. A few of the pieces are “removable” thanks to me not realizing what I had when I first picked it up. In the end though, helps with seeing the various aspects a bit more clearly. Can’t see umbilicus. Blue line in one of the pics is pointing to what I think is the siphuncle. Measurement marks are In cm. Thanks for your help
  9. Nautiloid

    I would like to make a entry to the collections data base and have been working on the different tags. I’m having trouble with genus and species. My geology maps say Silurian, I have narrowed it down to the Ludlum period, and believe extinction may have occurred during the Mulde event (an anoxic event) First time attempting to do this, any help at all will be appreciated.
  10. This specimen from the Finis Shale of Jacksboro Texas is the first example of a Pennsylvanian nautiloid showing part of the aperture that I have found or even seen. Maybe they are common and I just don't get out enough I believe this is Stenopoceras sp. and the attached clam is probably Pseudomonotis beedi since that's the only species of that genus I can't find an image of and the others on the fauna list have ribs that curve away from center. You can help me twice if you can confirm the clam ID and show us your nautiloid apertures for comparison. Outside of shell Inside surface Edge of possible aperture Margin showing profile wedging to a fine edge Close-up of edge profile before prep completed
  11. Orthoceras I

    Hi! A recent walk in the woods resulted in the discovery of this nautiloid. I found it in Wilson County, TN which is Ordovician. I am super excited about this because we found it in the woods on the property where I grew up, which means I probably walked past it a million times, and it's 3D so it shows the the siphuncle, and the outside of the phragmocone. We did not have anything to measure it with but I would estimate it to be about 12cm (5in). So my questions are these: I think first verify what I think this is and what I see as I am new to this. I have looked around the internet for genus/species of Orthoceras found in TN, but can't find anything, does anyone know? The fossil is covered with moss, what is the best way to clean it without breaking anything (once we drag this monster rock out of the woods and to the house)? Thank you so much for opinion/advice/help!
  12. Is This a Nautiloid Cephalopod?

    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!
  13. Hello all! Here are some of my my favourite scenery and fossil pictures from the last few weeks! Decided to hit up some new spots way up in the north end of Toronto along the Humber river - which yielded some very nice shells and crinoid segment (instead of the usual nautiloids). I'm in the midst of getting the weird nautiloid section so stay tuned: Lets kick things off with a couple very pretty shells and crinoids from the north end trip: the 7 shells from the left are Ambonychia, with the two black right shells being Pholadomorpha pholadiformis (I believe). Some crinoid segments on the far right These Ambonychia shells were definitely my favourites of the bunch^ When it comes to crinoids, this is about as good as it gets here in Toronto!!!! Almost nobody finds calyxes here, so this is about as good as it gets!
  14. Hello all! So I've been looking through my collection and noticed a bunch of fossils that I haven't yet identified yet. Some of them are quite peculiar, as I've never seen some of them until now. This'll be a long post with 12 different fossils in need of a name so brace yourselves hahah: All fossils found in Toronto creeks - Ordovician Era - Georgian Bay Formation 1. I thought this was the typical Treptoceras crebriseptum that I always find at my local creek, but when I cracked it out from the matrix I noticed it was perfectly smooth. Maybe its the living chamber of the nautiloid? 2. I honestly have NO clue what this is. Never seen anything like it. I thought it was nothing, but it seems to have such a defined symmetrical shape... ...
  15. Orthoconic nautiloid

    From the album Fossils of the Upper Ordovician Lorraine Group in New York

    Orthocone cephalopod Upper Ordovician Lorraine Gr. Whetstone Gulf Fm. Jefferson County, New York Collected 11/11/19
  16. Hello again! Sorry for the constant posts, but I've been finding a lot of amazing stuff recently! Anyways, as the title says, this was probably one of my best hauls ever for a single day! I managed to find over a dozen different nautiloid chunks and was able to extract toooooons of super well defined and complete brachiopods from a matrix piece!! This will be another 3 part post as i have lots of pictures: Here was the full haul for the day, with ruler for reference (notches in cm). Here are some alternate angles of the nautiloids. I going to assume/believe they are mostly, if not all Treptoceras Crebriseptum, but if anyone notices any different species I'd be glad to know! some nice crinoid stem segments, a Pholadomorpha Pholadiformis and Ambonychia plate, and another decent nautiloid.
  17. Nautiloid Eutrophoceras

    From the album Central Texas Fossils

    Nautiloid Eutrohpoceras - Austin Chalk Formation
  18. Nautiloid Cymatoceras

    From the album Central Texas Fossils

    Nautiloid Cymatoceras - Georgetown Formation
  19. Hello to all! Its been a very long time since I've been on here, but my recent trips around the creeks in Toronto, Canada (in the Etobicoke area) have yielded some of my largest and most defined finds of all time, here are some of the nicest Orthoconic Nautiloids I had found yet: Probably the nicest one in my collection at this moment, found almost completely by fluke when I hit a rock with my pick and this bad boy showed up Imprint made by the previous one These last couple would be way nicer, if only I could find a way to get it out of the rock matrix without completely destroying the specimen :/ ... Anyways, it good to be back and hunting this summer after a somewhat stressful finals season. I also have wayyyyyy more stuff that I found such as some unusually large and defined bivalves and tentaculites (maybe?), but I might save those for another time as they definitely weren't as cool as these ones. All were found along river rock deposits In the west side of Toronto (Etobicoke, Humber and Mimico creek) - Georgian Bay formation, excavated using rock pick and chisel.
  20. Pennsylvanian Nautiloid

    This one is found in Yangquan of Shanxi, China, together with Domatoceras and Huangheceras, Pleuronautilus etc. This one has an envolute , slowly exapanding coil, with an edge on the bottom side (missing on the top side possibly due to wear and tear) . It seems to have an wavy profile, possiblely due to large nodes. any clue what it could be?
  21. Nautiloid ID

    Hello all, I found this nautiloid fragment in the Kope Formation out of the Cincinnatian series in Northern Kentucky. Suspecting this to either be an Endocerid due to the size or perhaps even a coiled nauitoid due to the curvature in the camerae towards the end with the siphuncle sticking out and the general shape of the specimen, unfortunately not preserving detail towards the other end. I was thinking it could be Characteroceras due to them being found in the Kope, but it seems to be too big. Seems like this guy died, sank to the bottom and preserved the side that planted in the Ordovician mud, interesting that you can still see the outline of the siphuncle on that end. Curious as to what you all think, I just don't know what to put it in as for my database. Thanks you all!
  22. bivalves and orthocone

    Also from @Kane, i'd like a little help to determine those devonian ones 1) From Deep Springs a) 2.4 cm hight, 3.2 cm width Grammysioidea arcuata ? b ) Modiomorpha ? Grammysia ? 4 cm hight, 2.5 cm width 2) Widder formation, Eifellian : a) 2.5 cm hight, 1.7 cm width b ) 4.7 cm hight, 2.9 cm width for the taller and 1.5 cm of thickness for the other one.
  23. 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
  24. Good morning folks. I have a Dolorthocera pseudorthocerid, nautiloid cephalopod. It's Carboniferous period from Serpuhovian Stage, Brontsy quarry, Kaluga region of Russia. Can anyone confirm the ID or provide a link where I can perform some additional research? Thanks in advance.
  25. Here are some Nautiloids that I collected from the Eocene, Nanjemoy Formation of Maryland. I believe that they are Hercoglossa Tuomeyi. I’ve found lots of fragments but these are the larger, more complete specimens. Most of the outermost shell material is gone with the exception of the large specimen back, right which still has most of it. The large specimen center, back measures 12”x10”x6” and weighs 35 pounds. I about broke my back lugging it more than a mile off the beach. I’m not really sure that the small specimen on the stand in the center, back is the same species as it does seem to have different features from the others. Marco Sr.
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