Rusophycus Hall, 1852
Small to medium bilobate structures, lobes are parallel or sometimes merged near the posterior. Can be formed like elliptical bulges with taperings to one end; can have furrows. Form pits that vary in size and shape, and excavated either deeply or shallowly in the medium. Transverse scratch marks are visible in firmer media.
Cubichnia, praedichnia, or fodinichnia; Evidence of a resting animal; can represent concealment or stationary feeding with some position shifts. Can be interpreted as a predatory trace when found superimposed on an endobenthic trace like Helminthopsis
Shallow marine settings, but also reported in fluvial and shallow lacustrine soft-ground media. Reported in Cambrian – Ordovician deep-marine flysch deposits.
Trilobites (Precambrian - recent), starfish, bilateral arthropods and vertebrates, or other non-sessile benthic dweller (Permian - recent). Larger specimens could be made by vertebrates.
(Fillion and Pickerill, 1990)(Pickerill, 1995)(Keighley and Pickerill, 1996)(Pickerill and Blissett, 2000).