Darktooth Posted September 15, 2017 Share Posted September 15, 2017 2 hours ago, Ryann10006 said: @Darktooth A large dipleura dekayi is just as nice, that must've been a sight to behold at 6.5. Also trimerus and especially of course the Arctinurus boltoni are just as lovely, That's awesome, to bad I'm trapped in NYC and pretty far from any trilobite sites that I know of, besides the accidental mini deposit in my area which is pretty much cleaned, I unfortunately have to depend on the ebay shale to come across any for now haha. There are sites to find trilos just a few hours drive from NYC. If you want some info pm me I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Kurufossils Posted September 15, 2017 Author Share Posted September 15, 2017 @Darktooth Thank you very much I appreciate the offer! I'd love to plan a trip sometime I'll definitely pm you momentarily. Link to comment Share on other sites More sharing options...
FossilSniper Posted April 8, 2018 Share Posted April 8, 2018 On 9/14/2017 at 1:59 PM, erose said: I have only rollers and all small. I do have a hypostome that would have been from a 14-16 inch specimen. Probably Isotelus maximus from the Whitewater Formation in Dayton, Ohio. Most of the Cincinnatian giants are in museums. I've been told that the biggest ones are often found upside down and have to be prepped by first building a base on top, flip over and prep "up" to the shell. The largest Isotelus species is I. rex and it is found up on the Hudson Bay I think. Malcolm, how do you find the Ontario specimens? Up or down? Hey Erose, I'm an Isotelus sp. hunter from the Caesar Creek Lake spillway, and I came across a GIANT hypostome (~5.5 cm at widest width) and I have had trouble figuring out the size of the trilobite which it came from. How did you do it? This hypostome needs a master... and I need your magic! Thanks! (Hahaa, this is my first post :-D) Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted April 8, 2018 Share Posted April 8, 2018 Good thing I don’t “covet thy Forum neighbor’s fossils”. I have one little 1/2 inch Kermit the Frog Isotelus, he’s perfect, and I found him myself. If another never happens, I’m content. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Malcolmt Posted April 8, 2018 Share Posted April 8, 2018 The little kermits are amongst my favorites to find Link to comment Share on other sites More sharing options...
piranha Posted April 9, 2018 Share Posted April 9, 2018 29 minutes ago, Little_Hammer_Man said: ...I came across a GIANT hypostome (~5.5 cm at widest width) and I have had trouble figuring out the size of the trilobite which it came from... A 5.5 cm hypostome would belong to an approximately 30 cm (12 inch) Isotelus. Click on the attachment sized approximately with a 5.5 cm hypostome. Rudkin, D.M., & Tripp, R.P. 1989. The type species of the Ordovician trilobite genus Isotelus: I. gigas Dekay, 1824. Royal Ontario Museum, Life Sciences Contributions, 152:1-18 2 Link to comment Share on other sites More sharing options...
FossilSniper Posted April 9, 2018 Share Posted April 9, 2018 (edited) 29 minutes ago, piranha said: ...A 5.5 cm hypostome would belong to an approximately 30 cm (12 inch) Isotelus. Click on the attachment sized approximately with a 5.5 cm hypostome... Thanks! This was extremely helpful. My extrapolations present a ~28 cm Isotelus, judging by the diagram (which falls very close to your estimate, yay!). I am nearly certain that my hypostome is that of Isotelus maximus (rather than that of I. gigas, as in the figure), so is there any diagram of I. maximus which I can use in a similar way? And, if these images are coming from a database, can I have a link? They are so useful! Edited April 9, 2018 by Little_Hammer_Man Link to comment Share on other sites More sharing options...
piranha Posted April 9, 2018 Share Posted April 9, 2018 4 minutes ago, Little_Hammer_Man said: Thanks! This was extremely helpful. My extrapolations present a ~28 cm Isotelus, judging by the diagram (which falls very close to your estimate, yay!). I am nearly certain that my hypostome is that of Isotelus maximus (rather than that of I. gigas, as in the figure), so is there any diagram of I. maximus which I can use in a similar way? And, if these images are coming from a database, can I have a link? They are so useful! The ratio should be similar for Isotelus maximus. Here is that paper: LINK 1 Link to comment Share on other sites More sharing options...
DevonianDigger Posted April 9, 2018 Share Posted April 9, 2018 (edited) This is the only identifiable I. maximus I have, and it's nor particularly maximus in size. The other is "enrolled", and by enrolled I mean pancaked and pretty messed up. I have better Homotelus than Isotelus. Incidentally, if anyone out there is interested in parting with a complete prone Isotelus, I would be interested in knowing more! Edited April 9, 2018 by DevonianDigger (helps if I include the image) Jay A. Wollin Lead Fossil Educator - Penn Dixie Fossil Park and Nature Reserve Hamburg, New York, USA Link to comment Share on other sites More sharing options...
piranha Posted April 9, 2018 Share Posted April 9, 2018 Here is another illustration based on a composite of Isotelus maximus. Similar ratios as mentioned above. image from: Raymond, P.E. 1920 The appendages, anatomy, and relationships of trilobites. Connecticut Academy of Arts and Sciences, 169 pp. LINK 1 Link to comment Share on other sites More sharing options...
FossilSniper Posted April 9, 2018 Share Posted April 9, 2018 (edited) 17 minutes ago, piranha said: ..Here is another illustration based on a composite of Isotelus maximus. Similar ratios as mentioned above... Excellent! Thank you for helping so much! These are images of the hypostoma. I am lucky that half of the specimen is somewhat intact (Right half), as otherwise the other half would be impossible to calculate! The image you provided places my potential I. maximus at ~32.2 centimeters in prone length! wow! what a monster! Edited April 9, 2018 by Little_Hammer_Man Link to comment Share on other sites More sharing options...
erose Posted April 9, 2018 Share Posted April 9, 2018 Thank you Piranha. Would have taken me a while to find my original graphic references. Attached is a photo of the large hypostome I collected years ago in Dayton, Ohio. I found it in a tiny exposure of the Whitewater Formation, Richmond Group. Pretty sure it is I. maximus as well. The scale bars are metric and there is a little foreshortening, but it was well over 5-6cm wide as well. 1 Link to comment Share on other sites More sharing options...
Jesta384 Posted April 22, 2018 Share Posted April 22, 2018 Gorgeous @erose! Where in Dayton? I'm out here for a few days on a last minute business trip and am scrambling to do my research! Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 22, 2018 Share Posted April 22, 2018 @Ryann10006, Just saw this post. A little late getting to it. Wonderful examples pictured!!! I too dream of a large complete Isotelus. I am here to offer you large partials if you would like. Just message me and I can pic up a few when out hunting this summer. Mike Link to comment Share on other sites More sharing options...
MeargleSchmeargl Posted April 22, 2018 Share Posted April 22, 2018 No Isos yet. Don't even know a publicly open locality for them within 300 miles! Any PM help would definitely be appreciated! Every single fossil you see is a miracle set in stone, and should be treated as such. Link to comment Share on other sites More sharing options...
erose Posted April 22, 2018 Share Posted April 22, 2018 11 hours ago, Jesta384 said: Gorgeous @erose! Where in Dayton? I'm out here for a few days on a last minute business trip and am scrambling to do my research! Along a rail line that ran thru east Dayton. Tiny exposures scattered along the tracks west of Smithville Road for about a mile. But we are talking 30 years ago. Link to comment Share on other sites More sharing options...
Kurufossils Posted April 24, 2018 Author Share Posted April 24, 2018 @minnbuckeye Thanks! I have gotten alot of partials lately but I am always interested in larger ones. Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 24, 2018 Share Posted April 24, 2018 Just message me your address and I will likely be able to get you some large partials. @Ryann10006 Link to comment Share on other sites More sharing options...
Kurufossils Posted June 22, 2018 Author Share Posted June 22, 2018 Two awesome large partials found by @minnbuckeye seeing these pieces in person leaves alot to the imagination! Certainly a very exciting sight, the first one is about 2 inches and the larger one is a little over 3 inches wide. Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 22, 2018 Share Posted June 22, 2018 Check out this older thread for a drool worthy video trip for Isotelus trilobites. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Kurufossils Posted July 10, 2020 Author Share Posted July 10, 2020 Shouldve updated this thread a long time ago, but finally came across the biggest partial I could nab, Im pretty sure this is two different isotelus but both pieces definitely wouldve came from some big ones. Happy to at least have a piece at the bare minimum! 2 Link to comment Share on other sites More sharing options...
Kurufossils Posted August 15, 2020 Author Share Posted August 15, 2020 Never thought I would be updating this post so soon, but recently got a hold of by far my biggest isotelus partial measuring around over 6 inches + wide from Canada. I think it also came with a partial good sized hypsotome. This is the partial of a dream trilo for sure probably close to max size. 4 Link to comment Share on other sites More sharing options...
DLowe69 Posted October 21, 2020 Share Posted October 21, 2020 Not sure if you are still interested in seeing pics of large Isotelus or not, but I found this one earlier this year. This pic is as I found it, and it is about 9 inches long, 5 inches wide, and almost 3 inches high. I have had it prepped (by Malcolm), and I will do a post once I have it back and can take some pics with a ruler in it. Found near Eganville, Ontario, Canada. (For scale reference, I am 6'2", so my hand is fairly large...) 3 Link to comment Share on other sites More sharing options...
Kurufossils Posted October 21, 2020 Author Share Posted October 21, 2020 @DLowe69 I always am haha, what an amazing large specimen! I'd give an arm and a leg for one like that Link to comment Share on other sites More sharing options...
DLowe69 Posted October 21, 2020 Share Posted October 21, 2020 If I didn't already have both arms and both legs, I might have taken you up on that offer Yes, it is very large but it has some damage. Given its size - and its inflation - I don't really mind the damage at all though, as it makes it look more 'real' to me. I will make a post of the prepped pics in the coming days / weeks, but here is a teaser mid-way through the process... 1 Link to comment Share on other sites More sharing options...
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