Fig. 7
(A–C) Thick-lined tube associated with Scalichnus (yellow arrowhead). Note the core (red arrowhead) and the mantle (yellow arrowhead) that comprise the burrow lining. The green arrowhead indicates the trace continuation above. (D) Thick-lined siphon tube that resembles Skolithos. (E,F) Scalichnus with different tubes probably associated with changes in siphon position in the substrate. (G) Thick-lined siphon tube with core (yellow arrowhead) and mantle (red arrowhead). The green arrow indicates the different siphon’s positions. (H) Stacked Scalichnus indicating upward repositioning of the bivalve in the substrate.
