Lingulichnus Hakes, 1976

Emended diagnosis: Vertically to obliquely oriented sediment-filled tubes with elliptical to sub-circular cross-sections; ends of the ellipse pointed to slightly rounded; tubes roughly symmetrical in two axes (parallel and perpendicular to the long axis of the ellipse); straight to slightly sinuous or J- to U-shaped; concentric laminae or spreite present in some specimens; minute, vertically-oriented, sediment-filled central tube present in the centre of some specimens (emended after Hakes,1976).