VericerasVericeras is an extinct genus of nautiloid cephalopod that lived in what would be Europe during the Silurian from 421—418.7 mya, existing for approximately.TaxonomyThe type species, V. ambigena, was originally described by Joachim Barrande as "Orthoceras ambigena. Vericeras was assigned to Orthocerida by Sepkoski.MorphologyThe shell is an elongated orthocone with fine, longitudinal ribbing, very similar to the shells of its sister genus, Arionoceras.Fossil distributionFossil distribution is exclusive to Silurian marine strata in Sardinia.