Bergeroniellus asiaticus has been assigned to the Redlichiidae of the Redlichiida by some scientists and the Ellipsocephalidae of the Ptychopariida by others. Whichever the case, it is an exceptional example from the Botomian Stage ( 520-525 million year old) deposits of Russia. The ecology of the Cambrian was quite fragile, perhaps in part due to low diversity. Some believe the Botomian witnessed a mass extinction as severe as that of the Permian. Some 83% of extant hard-shelled genera are believed to have perished during this time period. This example is quite well inflated, and far older than the more commonly seen Asaphids.