Paraceraurus exsul

Paraceraurus exsul is a species of trilobite that lived in St. Petersburg Region and Tver Region (in erratic blocks) of Russia, Estonia, Finland (Åland, in erratic blocks), Sweden, North Germany (in erratic blocks), Lithuania and Belarus during the Upper Llanvirnian Stage (463.5-460.9 Ma) ^[1] of the Middle Ordovician. These trilobites can reach a length of about 16 centimetres (6.3 in). They show a square front edge, large genal spines on the cheeks and characteristic long pygidial spines. Genal spines are curved usually inward and upward.

Paraceraurus exsul Temporal range: Middle Ordovician
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Phacopida
Family:	†Cheiruridae
Genus:	†Paraceraurus
Species:	†P. exsul
Binomial name
†Paraceraurus exsul (Beyrich, 1846)
Synonyms
Cheirurus exsul Beyrich, 1846, Cheirurus exsul Schmidt, 1881, Cheirurus exsul Beyr. Schmidt, 1907 Paraceraurus exsul (Beyrich, 1846)