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  1. Hey all, I am looking to add two new species to my collection. I would like a Dipleura and an Isotelus. Also interested in most any Asaphida species. Preferably complete / relatively complete (Rollers are fine) Please DM me photos if you have any you are okay to part with and we can make a trade.
  2. Bringing Fossils to Life

    Unknown fossils from the Coburn Formation

    Recently I went fossil hunting along a road cut revealing some of the Coburn Formation, latest Ordovician. I was stunned to find that so much of the ecosystem was made up of only Trilobites and Cephalopods. I found trilobites such as Isotelus and Cryptolithus (First picture). My find of the day was a large, very heavy plate of rock that preserves different parts of large Isotelus gigas from multiple individuals, and the circular cross-section of a small cephalopod (Second picture). However, I'm having trouble identifying these cephalopods. In the very few that preserve the outer sell, faint s
  3. Nautiloid

    Huge Isotelus gigas

    From the album: Nautiloid’s Trilobite Collection

    This bug is in rough shape but I still kept it due to its massive size. It would’ve been 10.5-11.5 inches long if the bottom half of the pygidium wasn’t MIA. As you can see, the left half was exposed to the elements and is heavily weathered, but the right half is still relatively salvageable. This is by far the largest trilobite I’ve ever collected! Collected 11/04/2022

    © Owen Yonkin 2022

  4. Nautiloid

    Super nice Isotelus gigas

    From the album: Nautiloid’s Trilobite Collection

    This bug is exactly 6 inches long. It’s not super inflated, and a small piece of the pygidium is missing. Other than that it’s pretty much perfect! From the Trenton Group of New York. Collected 11/04/2022

    © Owen Yonkin 2022

  5. KompsFossilsNMinerals


    Hi all, I found what I presume to be an Isotelus in the Trenton Group of NY yesterday. I posted the trilobite online and someone was saying that it is not an Isotelus based on how the trilobite looks Micropygous, and that they think it is a Proetid (even though the cephalon looks like an Isotelus’?) The trilobite I found looks to be in the Meraspis stage. Can anyone help clarify if this is an Isotelus, or what it could be if it isn’t? Here are some photos of the trilobite… Photo taken with my digital microscope Pygidium
  6. Fossildude19

    Juvenile Isotoleus

    From the album: Fossildude's Ordovician Finds

    Found in West Canada Creek at the KOA campground in Herkimer, NY. Ordovician. Juvenile Isotoleus sp. Note the Hypostome visible in the center where the top of the cephalon came away.

    © &copy 2010 Tim Jones

  7. Nautiloid

    New York Isotelus gigas

    From the album: Nautiloid’s Trilobite Collection

    This is a well-inflated specimen of Isotelus gigas from the Trenton Group of New York. Unfortunately the cephalon is missing, but this is still a pretty rare find. Collected 9/7/2022

    © Owen Yonkin 2022

  8. Tales From the Shale

    Iowa Trip 09/03/2022

    Traveled to Iowa for a second time this weekend. My goal was the various molt beds of Isotelus in Fayette county. Here are most of the finds. While there I stumbled upon a local hunter who was nice enough to give me all of his hunting spots. He seemed to be as surprised as I was to find someone else in the field. A few isolated hypostomes here, and some others in various hashplates. Mixtures of pygidiums and cephalon structures. I think an eye can be seen in each of these images. Some decent sized pygidiums. They were the most common part of the
  9. Tales From the Shale

    Isotelus Beds of Iowa

    I've been doing some research for a couples weeks about the Isotelus beds located over Fayette county. It's been rather difficult to locate a specific site, so I'm asking if anyone who's been down there has any specifics when trying to locate them. I know of the Turkey river, but I'm four hours away so I just want to make sure I have a clear idea. Thanks, Jonah
  10. Nautiloid

    Enrolled Isotelus maximus

    From the album: Nautiloid’s Trilobite Collection

    From the upper ordovician “butter shale” bed of the Arnheim Formation, Mount Orab, Ohio Given to me by a fellow fossil collector

    © Owen Yonkin 2022

  11. Nautiloid

    Underside view

    From the album: Nautiloid’s Trilobite Collection

    View of the underside of the Isotelus maximus

    © Owen Yonkin 2022

  12. Hello, I've been recently fascinated by large isotelus trilobites. Does anyone on here own one and would like to show and talk about it, I would if I owned one but I don't see that happening anytime soon haha. This is the largest I've seen for sale so far that would've been 8 inches, would be nice to be able to find one but I don't have that luxury.
  13. Hey Folks, went hunting last Saturday with my wife and Granddaughter looking for Trilobites. My wife just killed it with 2 large Isotelus Trilobites and a super rare DOUBLE Isotelus slab! Me??? They don't call me Empty Pockets for nothing! YouTube video here: Prepped pics are at the end of the video.
  14. Last weekend, I decided to venture out to my favorite site to find trilobites. It is a site better visited during dry weather, but I couldn't wait! I do not know which was muddier, the truck or me when I packed it up. Here is the location without the mud visable. This material is best approached by splitting larger slabs of matrix. The result is always a bunch of trilo-bits. This is a nicer hash plate found that day
  15. I had posted pics of my latest (May 23) find earlier - as it looked when I found it - but here are the updated pics now that it has been prepped (thanks Malcolm). It is just under 3 1/2 inches long, and is fully inflated. There is some damage to the pygidium that I saw when I found it, but the remainder of the trilobite is very well preserved. I especially like that both genal spines are fully intact, one eye is undamaged, and it also looks like this trilobite was struck between the eyes with something while it was still alive...
  16. After finding a few larger trilobites last year, I found my first trilobite of this season today. It is the smallest trilobite I have found yet, at 'only' about 3 inches in length, but it looks to be inflated and fairly complete. I am trying to determine if I should have this prepped, like my other ones. Thoughts? Also, am I correct in assuming this is an Isotelus, as with the other trilobites I found last year? Thanks,
  17. Fossildude19

    Isotelus hypostome.

    From the album: Fossildude's Purchased/Gift Fossils

    Before and after prep. Still needs a bit more... This was a gift from my good friend, JimB88. Thanks Jim!

    © © 2013 Tim Jones

  18. Yesterday my dad and I went to a local trout stream for a couple hours just to get out of the house. We did very well with the trout, I got 4 brookies and a brown and he got 7 brookies. On the way back to the car I noticed a small exposure along the side of the creek and took a few minutes to check it out. I immediately saw evidence of trilobites so I dug around some more and I found some nice stuff, including 3 new species for me. The rock is Middle Ordovician Trenton Group and It seems like the Sugar River Limestone. I will be putting photos on here throughout the day
  19. Tetradium


    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Isotelus gigas thorax and pygidium from Galena Formation (thanks Kane for the positive id).
  20. I am confused about how to id Isotelus species as they all looks alike. I know I rex is out of the range for Ordovician Platteville/Decorah/Galena Formation. #1 is the most complete (minus head) from Galena formation in southern Minnesota. Its also the only Galena one I am showing right now as other still need cleaning. #2 The largest pygidium from Platteville Formation. Not the most complete I have but is pretty wide. #3 I am disappointed with the quality of pics but just showing here. Pygidium of smaller Isotelus species from Platteville with the farth
  21. Greetings everybody! While I was on my fishing trip last weekend I took some time to look for fossils. I collected at a couple of creeks exposing the Middle Ordovician Trenton Group in North-Central NY. I found lots of trilo-bits and other goodies! Enjoy
  22. General question for the group: Would you rather find a large (large being over 8 inches, in my case), inflated trilobite with some damage OR a smaller, flat trilobite with very little damage at all? I know it would depend on the actual examples, but in general I was wondering what people preferred. I have a small one that I think is cool but the larger ones are just so much more impressive to me... I am just starting to collect trilobites, as I have only recently realized they can be found in my area. Thanks.
  23. Note: This is a follow-up post to my original post of about a week ago. I found this trilobite fossil near Eganville, Ontario, Canada. When I first picked it up, I thought it was broken but then I noticed that it was just slightly rolled and the pygidium was curved downwards. I have already posted a couple of pics of this Isotelus as found, but now that I have had it prepped (thank you Malcolm), it looks even better so I thought I would share.
  24. Found this trilobite this morning. At first, I thought it was only half of the trilobite but then I noticed that it was just folded over. Other than a bit of damage to one side, it is almost entirely intact and a pretty nice specimen. The attached pics show exactly what it looked like when I found it. If stretched out flat, it would measure 4.5 inches long. It is inflated, and is about 1/2 inch in height. The other trilobites I have found around this location have been Isotelus and I think this one is as well. Thoughts?
  25. ClearLake

    NE Iowa Paleozoic

    I read a lot of fossil hunting reports on here, but I don’t post many. I think it’s primarily because it is usually many, many months after I have gone when I finally get everything cleaned up, ID’d and take photos, etc. It just seems too after the fact to me at that point, haha. But this time, due to a wonderful “tour guide” we had, I wanted to get something posted in a relatively timely fashion. Because of that, I haven’t had time to do a lot of research I need to do on specific ID’s but luckily I’m somewhat familiar with most of what we found to make at least an educated guess.
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