This is a beautifully outstretched Trimerus trilobite. It is a Trimerus delphinocephalus from Middleport, New York. These trilobites are very hard to find in nice shape. This specimen is excellent, even though there is some compression on the right side. It is also nicely centered on the squared matrix block. It is very unusual to find one of these this articulated. It is an excellent Trimerus trilobite.