Illaenus tauricornis450 million years agoWolchow river near St. Petersburg, RussiaIllaenus tauricornis was a strange looking trilobite with curved spines extending backward from the ends of its cephalon (head) that look like something reminiscent of a handlebar mustache. It crawled across the warm ocean floor 450 million years ago in the Wolchow river near St. Petersburg, Russia. This lovely complete brown trilobite is 3 ½ inches long on a 6 x 4 inch light gray limestone matrix. Matrix measuring 6 1/2 x 5 x 3 in. Trilobite measures 3 1/2 in