Phycodes palmatus (Hall, 1852)

Description. Hypichnial or endichnial, horizontal initial stem subdivided into 3–5 smooth, cylindrical branches diverging from the same point. The common stem is 20–30 mm wide; the diverging branches are 10–15 mm wide and 10–25 cm long.

Horizontal hypichnial burrow system at the interface of a fine-grained sandstone and claystone with a slightly curved stem, 12mm in diameter, from which four gently curved and closely spaced burrows branch out.The distal parts of the branches are not preserved. Their oval cross-sections probably result from compaction. Burrow diameter is 8–10mm in the horizontal and 3–5mm in the vertical axis.

Horizontal branching system, consisting of a few branches developed from a single proximal tunnel and arranged in a digitate pattern. Branches taper laterally. Diameter of individual branches is highly variable. Tunnel fill similar to host rock. Trace diameter 5.3-8.1 mm. Lenght of structure 66.4mm. Preserved as positive hyporelief.