Article: Trilobites from the Ordovician of Portugal

The following trilobite species from the Llanvirn to Llandeilo of north and central Portugal a recorded or described and their stratigraphical ranges are discussed: Colpocoryphe aff. rouaulti (Henr C, cf. thoralis conjugens Hammann, C. grandis (Snajdr), Salterocoryphe salteri salteri (Rouault), Prionocheu mendax (Vanek), P. cf. pulcher (Barrande) and Valongia wattisoni (Curtis). Actinopeltis tejoensis sp. nov. a: Prionocheilus costal (Thadeu) from the upper Ordovician of central Portugal are described. Salterocoryp lusitanica (Thadeu) is put into synonymy with Salterocoryphe salteri salteri; Prionocheilus cf. pulcher recorded for the first time from Portugal; authorship of Prionocheilus costai is here attributed to Thadeu a a lectotype is chosen. The faunas show similarities with those in central Iberia and northwest France.