Taxon - Odkazy a literatura
Chlupáč I., Kordule V. (2002): Arthropods of Burgess Shale type from the Middle Cambrian of Bohemia (Czech Republic), Bulletin of the Czech Geological Survey, Vol. 77, No. 3, 167–182 [jako Helmetia fastigata Chlupáč & Kordule, 2002]