Ancorichnus Heinberg, 1974
Fürsich et al., 2018
Description:This ichnotaxon occurs in full relief at the top of grainstone beds 10 and 12. It is a non-branched, cylindrical, horizontal burrow with a diameter of 0.2-0.3 cm and 0.3-0.4 cm, respectively. The fill is identical to the surrounding matrix. The course of the burrows is irregularly sinusoidal with a variable wave length (commonly around 4-5 cm) and low amplitude. The burrows exhibit thin, dense meniscate backfills and were lined by a material softer than the burrow fill, which has now weathered away. In bed 12 the ichnotaxon occurs in great abundance in the troughs of current ripples and follows the direction of the troughs.
Frey et al., 1984b
Emended diagnosis.- Distinctly lied, smooth-walled, cylindrical to subcylindrical meniscate burrows of variable orientation. Menisci extend to, or into, the wall lining.