Spongelimorpha iberica Saporta, 1887

Emended Diagnosis.—Cylindrical to elliptical, simple to complex, and mainly horizontal burrow systems, showing Y- and/or T-shaped branching, characterized by an ornamented and unlined wall (i.e., with bioglyphs). Bioglyphs consist of sharp Y-shaped ridges, longitudinally disposed with respect to the main axis of the burrow, and sets of shorter, parallel, rectilinear ridges oriented perpendicularly to the axis of the burrow. Short, blind tunnels with a very characteristic tapering termination are very common (after Calzada, 1981; Gibert and Ekdale, 2010; Gibert, 2011).