Rusophycus bonnarensis Crimes, Legg, Marcos et Arboleya, 1977

Description.- Preserved on sole as positive features filled with medium-grained sand- stone and consisting of fused pair of large and deeply excavated markings forming horse- shoe or moustache-shaped trace with steep margins tapering posteriorly at each side. Poorly preserved coarse scratches parallel to front margin present on one example (Figure 12.3). Specimens 9.5 and 12 cm wide, 8.5 cm long and about 2 cm deep.