Lingulata - Acrotretida - Biernatidae
Parent taxon: Acrotretida according to J. Hansen and L. E. Holmer 2011
See also Williams et al. 2000
Sister taxa: Acrotretidina, Acrotretoidea, Eleutherocrania, Ferralstreta, Maruia, Orbiculopora, Pseudometoptoma
Subtaxa: Biernatia Opsiconidion
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of the Czech Republic (2 collections), United States (1: Alaska)
• Silurian of Australia (4), Austria (2), the Czech Republic (1), the United Kingdom (4)
• Uhaku of Sweden (5)
• Chazyan of United States (1: Alabama)
• Volkhov of Estonia (4)
• Ordovician of Australia (5), Estonia (10), Iran (3), Norway (5), the Russian Federation (5), Sweden (20), the United Kingdom (1), United States (1: New York)
Total: 74 collections including 85 occurrences