Rare arthropod traces from the Ordovician and Silurian of Estonia (Baltica)

Arthropod trace fossils are rare and of very limited diversity in Ordovician and Silurian strata of Estonia. Only two ichnogenera have been documented: Rusophyucus is known from a single occurrence in the Late Ordovician (Katian) and Cruziana from several specimens in the Late Silurian (Ludlow to Pridoli). In contrast, body fossils of large arthropods are relatively common in these rocks, suggesting that the poor trace fossil record is related to their lower preservation potential in the dominantly carbonate mud and sand lithologies on wide epeiric carbonate platform.