Coming from the nearly half billion year old Middle Ordovician Asery Level deposits of the Wolchow River region near Saint Petersburg, Russia, this is an example of the exceedingly rare Odontopleurid Apianurus kuckersianus. The genus was formerly assigned as Acidaspis, another quite bizarre creature, but the current name was given to similar material in 1968. This one has the marvellous Devonian trilobites Koneprusia, Dicranurus, and Ceratonurus as relatives, but far outclasses them all. The trilobite itself is 3.0 inches long (including the pleural spines) and 2.5 inches wide at the genal spines. Notice the many tubercules present on the the cephalon, thorax, and pygidium. The species name is derived from the Kuckers region of Estonia, where fragmentary remains have been found.