Ichnofossils

Rusophycus Hall, 1852

Taxon description

Hammersburg et al., 2018

Diagnosis.—Small to large bilobate mounds or depressions with parallel or merged lobes near the posterior; parallel to oblique to transverse striations; however, some specimens may be smooth (Crimes, 1970b, Osgood, 1970; Alpert, 1976a; Fillion & Pickerill, 1990; Keighley & Pickerill, 1996).

 

Keighley & Pickerill, 1996a

Diagnosis: Short (length to width ratio less than 2:1) interfacial bilobate burrow or surface mark resembling a coffee-bean, preserved in convex hyporelief (or, potentially, concave epirelief), Ovate lobes parallel to slightly divergent and may be smooth or exhibit transverse to oblique scratch marks (after Osgood, 1970; Alpert, 1976; Fillion and Pickerill, 1990).

Selection of related publications
Vinn, O., Toom, U. 2016. Rare arthropod traces from the Ordovician and Silurian of Estonia (Baltica). Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen 280, 2, 135-141. DOI:10.1127/njgpa/2016/0570
Knaust, D. 2004. Cambro-Ordovician trace fossils from the SW-Norwegian Caledonides. Geological Journal 39, 1, 1-24. DOI:10.1002/gj.941
Rydell, J., Hammarlund, J., Seilacher, A. 2001. Trace fossil associations in the Swedish Mickwitzia sandstone (Lower Cambrian): Did trilobites really hunt for worms?. GFF 123, 4, 247-250. DOI:10.1080/11035890101234247
Jensen, S. 1997. Trace fossils from the Lower Cambrian Mickwitzia sandstone, south-central Sweden. Fossils and Strata 42, 1-110.
Orłowski, S. 1992. Trilobite trace fossils and their stratigraphical significance in the Cambrian sequence of the Holy Cross Mountains, Poland. Geological Journal 27, 1, 15-34. DOI:10.1002/gj.3350270104
Palij, V. M., Posti, E., Fedonkin, M. A. 1979. Soft-bodied Metazoa and trace fossils of Vendian and Lower Cambrian. Upper Precambrian and Cambrian Paleontology of East-European Platform, pp. 49-82.