Finichnus peristoma (Taylor, Wilson et Bromley, 1999)

Diagnosis. Leptichnus with sub-circular, elliptical or pear-shaped pits entirely or predominantly multiserially arranged. Pit long axes are aligned radially from the centre of the grouping.

Diagnosis: Finichnus with subcircular, elliptical, or pear-shaped pits entirely or predominantly multiserially arranged. Long axes of pits are aligned radially from the center of the grouping (Taylor et al., 1999).

Description: Poorly preserved specimens that consist of multiserially arranged lines of shallow, elliptical or pyriform pits, which reach a length of 0.25–0.35 mm and width of 0.1–0.3 mm at the inner surface of the mollusk shells. The total etched area does not exceed 5x10 mm.