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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!!!!!!

Hello all, I recently acquired this unidentified illaenid trilobite from the ordovician of Sweden. It's had some sloppy repair work (which I'm hopeful I can improve) but before I do I'm hoping someone can help me put a genus to it. It has a long, robust genal spine which doesn't seem to match any illaenus I've seen from Sweden. Any help is appreciated.

Real quick, I found this Russian illaenus online, does anyone know what species it is? The seller doesn't say. Also if any of you experts think you could roughly estimate the restoration on the piece (unlikely, I know) that would be helpful too. There's a patch on the pygidium that looks restored to me but the rest looks pretty good to my eye. Thanks in advance.

I found this pygidium the other day in the Silurian Racine formation near Chicago, wondering if any trilobite specialists can help with species ID? I'm thinking Illaenus ioxus (is that current nomenclature?)but not sure. Thanks for any help.