Sulcichnus helicoidalis Martinell & Domènech, 2009

Diagnosis.—Helicoidal groove running around the corallite. Description.—The trace consists of a groove that begins close to the base of the corallite and ends at the edge of the calyx, following an helicoidal, clockwise, sometimes irregu− lar, pattern around the skeleton. Between one and two com− plete turns are made and it may present one or two short branches. Usually, the deepest part of the groove corre− sponds with the nearest to the coral calyx, and it is never deeper than 2 mm.