This is a unique russian trilobite that I enjoy a lot. Pliomera Fischeri is probably my favorite russian trilo, other than the lovely lichid Hoplolichas Furcifer. The hypostom is also exposed on the other side. Trilo is lower Ordovician in age, from the Viobokalo Quarry, St. Petersburg Russia area. Tril is a little over 2 inches in length.