Ichnogenus Lapispecus is a winding, cylindrical boring. It differs from Trypanites in having a short, lateral vane extending along it locally,especially on the inside of curves (Voigt 1970, 1971; Bromley 1972).

Emended diagnosis: Long, cylindrical tunnels in lithic calcareous substrates, penetrating the substrate either twinelike in narrow windings or in wider ribbons, depending on available space. Occasionally a vane is developed between the concave side of the tunnels, whereas, more commonly, a narrow and distinct vane runs along most parts of the tunnel, connecting it to the substrate surface.

Unbranched, winding.

Category of architectural design: 2.61. Winding borings.