Malcolmt Posted April 2, 2012 Share Posted April 2, 2012 (edited) 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 Edited April 2, 2012 by Malcolmt Link to comment Share on other sites More sharing options...
Auspex Posted April 2, 2012 Share Posted April 2, 2012 That's a BIG one! Congratilations! Compare with Peter's: LINK "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Malcolmt Posted April 2, 2012 Author Share Posted April 2, 2012 Yes the tail on Peter's is tiny by comparison... Link to comment Share on other sites More sharing options...
Missourian Posted April 3, 2012 Share Posted April 3, 2012 Very cool. Here's a Pennsylvanian phyllocarid telson for comparison: Context is critical. Link to comment Share on other sites More sharing options...
Malcolmt Posted April 3, 2012 Author Share Posted April 3, 2012 Again very small by comparison Link to comment Share on other sites More sharing options...
Missourian Posted April 3, 2012 Share Posted April 3, 2012 Again very small by comparison I should take another look at my concretions. What I thought were fish spines very well could be pieces of large phyllocarids. Context is critical. Link to comment Share on other sites More sharing options...
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