Treptichnus apsorum Rindsberg et Kopaska-Merkel, 2005

Diagnosis.Treptichnus consisting of shallow, U-shaped segments serially connected in a zigzag, irregular, or other pattern near their ends, and, where well preserved, having longitudinal striae on at least the lower surface of the burrow, or on each of several laminae flooring the burrow, or in some cases on the sediment beyond the apertures.