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I had a very good day collecting last Friday just going through some of the material now. I think I may have found the head and first two somites of a pterygotid. This was found in Bertie Dolestone of the Williamsville formation. This is late Silurian in age. I had to back the matrix with epoxy as it was literally paper thin in spots and ther was a hole besides the head that is filled with epoxy I was thinking it is a pterygytus because the head and body are much smaller (thinner) than the other eurypterids lacustris that I found. Any expert out there want to take a guess. Only time will tell if it continues back under the matrix. The reverse of the slab it is on is just covered with bits of Eurypterids.
I spent the day Friday hunting for Eurypterids. I was pleasantly surprised when I found what I believe to be the tail and last segment of a phyllocarid. Definately looks like the picture in my book "Fossil Ecosystems of North America" This was found in Bertie Dolestone of the Williamsville formation. This is late Silurian in age. Based on the commonest phylocarid in this formation being ceratiocaris acuminata, I suspect that is what I have here. The tail spike appears to be adjsacent to the last segment which is outlined with a black fine sharpie. The tail section itself is 67 millimeters in length. Basically unprepped just a quick dust to get some of the crud off. Here is a close up of the tail Here is a diagram I found