Sulcichnus Martinell et Domènech, 2009

Diagnosis.—Shallow groove parallel to the columella and bending 90° close to the calyx, to form a deeper, ring-shaped groove (cited from Martinell and Domènech 2009).

Description.—Shallow grooves (1 mm maximum in depth) that run more or less in parallel to the axis of the columella from close to the base of the corallite. They turn a sharp 90 to the left when reaching a point a few millimetres from the edge of the calyx, where they deepen (to some 2 mm) and run almost the whole of the perimeter of the corallite, thus taking on the appearance of a branding iron.

Macroboring; substrate calcareous; tracemaker invertebrate.

Category of architectural design: 2.78. Elongate or branched attachment bioerosion traces.

Unbranched, branched, groove.

Long grooves, sometimes branched, running along the surface substrate sinuously or in a contorted fashion. Grooves never run in parallel, and loose or tight loops may occur.