Machichnus Mikuláš, Kadlecová, Fejfar et Dvořák, 2006

Revised diagnosis: Single or grouped parallel or subparallel furrows perpendicular to the edge of hard substrates. They typically lack bioglyphs and filling and have uniform dimensions and shape. The furrow surface is smooth or longitudinally striated.

Predation; substrate osteic; tracemaker vertebrate

Diagnosis: Shallow serial parallel or subparallel grooves in hard substrates. The groove surface is smooth or longitudinally striated.Each series consists usually of dozens of grooves which are typically uniform in shape and dimensions. The grooves are oriented perpendicular to substrate edge.