| Abstrakt: |
A new ichnotaxon, Oravaichnium oualimehadjensis isp. nov., is here erected from greenish claystones interbedded by sandstone beds of the upper Jurassic (middle Oxfordian) Argiles de Saïda Formation from the Beni Berdaa section (Takhemaret area, Saïda Mounts, NW Algeria). It is a simple, hypichnial, smooth continuous burrows, which exhibit a box shape in cross section. O. oualimehadjensis is interpreted as predepositional trace fossil, produced by the locomotion activity of wedge-foot bivalves in a storm dominated shallow-marine environment. Oravaichnium oualimehadjensis constitutes the second ichnospecies of the rare ichnogenus Oravaichnium Plička & Uhrová, 1990 after O. hrabei, the type ichnospecies, described from Eocene flysch deposits of the Carpathians. |
