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Showing results for tags 'Isotelus'.
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Hi all, about 2 weeks ago during my spring break my father and I made the 6 hour trip up to Buffalo NY to collect at Penn Dixie. Our main focus is to bring back blocks for our weathering pile in the back yard, so we worked from around 11am to 5pm moving chunks and transporting them to the car. Here is a photo of me driving a wedge into the huge row of rock we were working on, it was pinned and took probably 30 min and a lot of thinking to break it free. Ill attach photos of some finds from the day below. Disarticulated Eldredgeops and a complete Greenops (I have done some exploratory prep and uncovered a genal spine) Another Eldredgeops This beautiful prone Eldredgeops had an unfortunate encounter with Murphy’s Law, and when I tried to split down the chunk to a more manageable size the whole bug shattered. In hindsight I should’ve just deadlifted the rock as a whole into my wagon, but hindsight is 50/50. The next day was a bit short, we had pretty much ran out of room for chunks and I was sunburnt and fatigued (Despite regularly applying sunscreen and drinking lots of Gatorade). If you zoom in on the image below you can see the sunburn on my arm. View of the spot we were digging before we leave (Kompsfossilsnminerals for scale) As we were packing up, I started tapping on some of the rock from the layer above where we were working. On my second or third chunk, this beautiful Eldredgeops rana popped out! Only missing a little of the cephalon’s shell as well as an eye, which I think I can recover from the negative. 1/2
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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 striae can be observed. The septa, when visible, are close together. On some of the smaller specimens, which may be a different species or the same, the uncrushed cross-section reveals what appears to be a small, eccentric siphuncle (Sixth picture). Most specimens, because of their size, are crushed flat. Only much smaller individuals sometimes retain their original shape. Arrows indicate septa unless stated otherwise. The large cephalopods appear similar to both "Michelinoceras" and Geisonoceras tenuistriatum, but this species is restricted to the Whitby formation in Ontario. Could anyone help?
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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
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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
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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 Face Isotelus life cycle I found on trilobites.info
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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
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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 molt I recovered. Another large hashplate I want to display on my desk. Found this in a large block I split from someone else's derelict hole. Pieces were abundant, however no full Isotelus yet. Finally a large piece of calcite my girl found.
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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
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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
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From the album: Nautiloid’s Trilobite Collection
View of the underside of the Isotelus maximus© Owen Yonkin 2022
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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.
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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...
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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,
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Trout fishing trip with some unexpected trilobite finds!
Nautiloid posted a topic in Fossil Hunting Trips
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 when I get time to photograph my finds Enjoy!!- 18 replies
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From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation
Isotelus gigas thorax and pygidium from Galena Formation (thanks Kane for the positive id). -
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 farthest left the only one from upper Decorah formation but lost most of its mineral covering. #4 Cephalon from Platteville formation (not complete). #5 from platteville is maybe the most complete I have of the small Isotelus species. Maybe even its pygidium is hidden in the carbonate.
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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
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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.
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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?
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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.
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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. I have seen numerous folks on here show some of their finds from the Ordovician and Devonian of Iowa and nearby states and it always looked intriguing to me as I have collected the Ordovician in the (relatively) nearby Cincinnati area and the Devonian in the Great Lakes area and Oklahoma. I wanted to see how the Iowa stuff compares. So my wife and I opted to take the long way home from Indiana to Texas and swing through Iowa (and on to South Dakota, but that was more for sight-seeing). I had done some research on sites to check out and contacted Mike @minnbuckeye to see if he could help me high grade my list. Being the absolute gentleman that he is, he did one better and offered to act as our tour guide for a day of collecting through the Ordovician! What a guy!! I can’t thank him enough for taking the time to do this. We had a great day and hit a bunch of nice spots, most of which I had not found on my own and certainly didn’t know some of the very important details of the sites. Many folks have said it in other trip reports and I can only add to the chorus of how valuable it is to go with someone that knows the area and how nice it is of TFF members such as @minnbuckeye to offer their time and energy to do it. Based on Mike’s recommendation, we spent our first day doing some collecting in the Devonian rocks of the Coralville, Iowa area. The first spot we could not access due to some current road construction but we made our way to the next one and spent several hours along the Iowa River/Coralville Lake collecting from the Coralville Formation of the Cedar Valley Group. You quickly learn how Coralville got its name as the rocks are a coral/bryozoan limestone. There are brachiopods and other fauna, but corals make up the bulk of the fossils at this site. And there were some very nice ones as you can see in the pictures below. Beautiful Hexagonaria, huge horn corals and others. We also went to the Devonian Fossil Gorge and a nearby state park, both of which have nice exposures of Devonian rocks with fossils, but no collecting. Here is a shot of the area, fossils litter the ground. This represents our total haul from this site The horn coral in here were abundant and quite large. Corals What I believe are Hexagoanaria corals. I think with a little cleaning, these will look really nice and I like the juxtaposition with the horn coral. Brachiopods and bryozoans A nice piece that was a little too big to take.
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One lives in hope. From one of my favourite hash plates, sent to me by my wonderful friend Ralph @Nimravis Southgate Hill road cut, St. Leon, Indiana, USA. Cincinnatian (Late Ordovician) Waynesville or Liberty Formation. Is this part of an Isotelus thoracic segment? Thank you so much for looking and any help is very gratefully appreciated. 11 mm across. And is this a bit of Isotelus? 2.2 cm long.
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OK, so guess who's using this Covid-related down time to post the topics he never got around to? In late 2013 I visited the Mt Orab "trilobite farm". This was my 3rd or 4th time (and final) and, as were most, I was always fairly lucky finding something. I usually just "dug" in the area where the flexis could be found, once stumbling on the partial Isotelus shown above. This day I decided to lend a hand on the area where Isotelus' were more prevalent. As at Penn Dixie, long crow bars were pounded into the layered shale so that massive pieces could be extracted. Those pieces were then methodically chiseled into smaller and smaller pieces in the hopes of uncovering an Isotelus. One partial was uncovered and folks oohed/aahed and commented about it. But at the end of the day it was laying in the scrap heap. I asked about it and was told by the "owner" of the property that since only a part of it was showing it wasn't worth his time to prep it further. As at many such spots, the impressive ones go to the owner. He told me I could have it. When I got home I wrapped it up good and pondered for a long time on how to prep it. 1 1/2 years later it still wasn't prepped (but still wrapped) and we moved into a big DIY house that I had to put a ton of time into. And the Isotelus was forgotten. And it stayed that way until this past fall/winter when I came across it among the boxes in my basement. "Oh yeah!" This was my first time prepping something so fragile but I decided on a plan. I'm a dremel and dental pick guy but I knew those were not the way. I used the dremel attachment with the sharp point as a chisel and slowly started to chip the dry shale. It worked remarkably well. The "lower" portion is the newly uncovered area. Once I got it completed I decided it needed a covering. It was too brittle and fragile to last. that's where I made my mistake !!!
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Just wanted to share one of my favorite Trilobite Hash Plates. It contains pygidiums, pygidial spines and cephalons from Gabicerarus mifflinesis, a free cheek from Isotelus species and a cephalon of Bumastoides milleri. It's from the Mifflin member of the Platteville formation, Grant County, Wisconsin. Ordovician period. Hope you enjoy.
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From the album: Finds From the Ordovician -488 to 443 MYA-
From the Georgian Bay Formation
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