The new trilobite genus Valdariops from the Harju Series (Upper Ordovician) of Estonia

The species Phacops (Chasmops) eichwaldi Schmidt, 1881 from the previous Lyckholm Stage, corresponding to the Nabala, Vormsi, and Pirgu stages, has been defined by Schmidt (1881, Mem. Acad. Imp. Sci. St.-Petersb., Ser. 7, 30, 1) in a very wide sense and a virtually a composite species. This species-group is here assigned to a new genus Valdariops, with the species V. eichwaldi (emended), V. aliquantulus sp. nov., V. angustus sp. nov., and V. kernuensis sp. nov. Two additional forms are figured as Valdariops sp. nov. A and Valdariops sp. nov. B. All these species have a stratigraphically limited range as guide fossils for different parts of the sequence of the Harju Series in the North Estonian Confacies Belt.