1. Upper Ordovician glacial deposits in southern Jordan;Abed;Episodes,1993
2. Remarkable Cruziana beds in the lower ordovician of the cordillera oriental, NW Argentina;Aceñolaza;Ameghiniana,2005
3. El Paleozoico inferior de Argentina según sus trazas fósiles;Aceñolaza;Ameghiniana,1978
4. Trace fossil assemblage from the Nagaur Group, western India;Ahmad;J. Palaeontol. Soc. India,2014
5. Bergaueria Prantl (Cambrian and Ordovician), a probable actinian trace fossil;Alpert;J. Paleontol.,1973