This is a very unusual trilobite plate. It is a large Illaenus tauricornis double from the Ordovician of Russia. Most Illaenus have rounded genal angles, and do not have genal spines. This type has long, hook-like genal spines on each side. This specimen showcases these spines on both bugs in wonderful fashion - both pairs of long genal spines were prepared free-standing! The outstretched trilobites are extremely 3-dimensional and very well articulated. The natural caramel coloration of the bugs is quite striking, and the detail is excellent. The widely-spaced eyes are easily seen, and the huge, bulbous glabellas are very impressive. The trilobites display beautifully on the large, sculpted plate of limestone. This is one of the most impressive Russian trilobite multiples that we have had.