Bivium diluviandi Bojarski, Cierocka et Szwedo, 2025

Diagnosis. Macroboring, 2.1–5.0 mm wide. The main tunnel is 5.0–5.5 cm long, slightly wider than the parallel branching tunnel. Main and branching tunnels posteriorly conjoining to form forking ending points. Opening tunnels 4.5–7.0 mm long. Interconnected tunnels form chambers with cylindrical areas (pouches) located in the wall of the chamber. Additional tunnels in various forms branching from wider, conjuring tunnels or chambers.