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Showing results for tags 'gabriceraurus'.
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I have just returned from a trip to Ohio where besides family events, I picked up some loose end trilobites collected over the last few years that I was reluctant to prep fully. @isotelus, tell your son that he did a magnificent job!!!!!!! My pride and joy first. Thaleops ovata from the Platteville Formation/ Ordovician of SW Wisconsin Not far behind is this trilobite that I hesitantly call Gabriceraurus mifflinensis. Unfortunately, I could not locate the missing genial spine. I am a bit confused on this one. Initially I had IDed it as Illaenus americana but after its prep, it appears to be T. ovata. What continues to confuse me is the lack of long genial spines like the first trilobite pictured. One is broken. So it is hard to say with it. But the other is just a non fractured nubbin. Finally an unknown trilobite from an unknown location. Unfortunately, it never got labeled which is not good considering my age related forgetfulness. @piranha IDed this as Calymene breviceps from the Waldron Shale!!!!!!
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As promised here is another of the specimens that I prepared that will be included in the new "Dawn of Life" gallery at the ROM. Not sure it belongs in the Preparation topic as I only have the single picture. Moderator feel free to move. Those that know me realize that I hate taking pictures. There are occasions when you get to work on a specimen that you absolutely do not want to return at the end of preparation. That was certainly the case with this one. Of all the specimens I have ever prepared for someone else, this plate is probably the one that I most wanted to keep for my own collection. This is natures art at its finest. This is in my opinion a stunning associated pair of trilobites a large Gabriceraurus hirsuitus (synomynous with G. dentatus) associated with a much smaller Ceraurus globulobatus. Hopefully a long awaited paper will be coming clarifying the naming of all these cheirids. This specimen is the plesiotype for the species and is catalogued as ROM specimen 46105. This specimen was selected to be featured in the new permanent "Dawn of Life" gallery at The ROM opening late 2021 (Covid permitting). Thank you Dr. JB Caron for permission to share. This specimen was originally described in a paper by William Hessin back in 1988 and was collected Bill at Brechin Quarry in the 1980's Truth in advertising. I was asked to do a repreparation and minor repairs to the specimen prior to public display in the gallery. Some preparation had been performed back in the 80's. I spent approximately 20 hours on this specimen. This work was done probono and was my pleasure and privilege to have been involved. It was done exclusively under an Olympus SZ30 stereo microscope using a COMCO MB1000 air abrasion unit using only sub 40 micron baking soda. All work was performed with .015 and .010 nozzles at under 10 PSI. (Hence why it took 20 hours). A small amount of scribe work was performed using a Pferd MST31 with fine styl;us and a Paleotools microjack-2. Some Minor repairs were completed using Bob Smith Industries Instacure super thin cyanoacrylate and Milliput super fine white 2 part putty. Unfortunately I only took a single picture . So here it is for your viewing pleasure. Definitely one of my favorites. Yes they are different species but as I was prepping this one I kept thinking of it as "Madonna and Child" So here here is what I refer to as "Madonna and Child" Please feel free to ask questions or you can PM me directly
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