Check-listy
* Výčet zemí nemusí být kompletní
Odkazy a literatura
[1] Mikuláš R. (2000): Trace fossils from the Cambrian of the Barrandian area, Czech Geological Survey Special Papers, 12, 1-29 [jako Didymaulichnus lyelii (Roualt, 1850)]
Mikuláš R. (2000): Trace fossils from the Cambrian of the Barrandian area, Czech Geological Survey Special Papers, 12, 1-29 [jako Didymaulichnus lyelii (Roualt, 1850)]