Family
Biernatidae Holmer, 1989
Selection of related publications
Popov L., Nõlvak J., Holmer, L. 1994. Late Ordovician lingulate brachiopods from Estonia. Palaeontology 37, 3, 627-650.
Holmer, L. E. 1989. Middle Ordovician phosphatic inarticulate brachiopods from Västergötland and Dalarna, Sweden. Fossils and Strata 26, 1-172.
Biernat, G. 1984. Silurian inarticulate brachiopods from Poland. Acta Palaeontologica Polonica 29, 1-2, 91-103.
Popov, L. 1981. The first record of microscopoic inarticulate brachiopods of the family Acrotretidae of the Silurian of Estonia. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 30, 1, 34-41. DOI:10.3176/geol.1981.1.06
Gorjansky, V. J. 1969. Bezzamkovye brahiopody kembrijskih i ordovikskih otloženij severo-zapada Russkoj platformy. pp. 1-176. Nedra.
List of species
1. Biernatia holmi Holmer, 1989 | Darriwilian
2. Biernatia rossicum (Gorjansky, 1969) | Kunda Stage
4. Opsiconidion podlasiensis Biernat, 1984 | Wenlock
5. Opsiconidion praecursor Popov, Nõlvak et Holmer, 1994 | Pirgu Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Linguliformea |
| Class | Lingulata |
| Order | Acrotretida |
| Superfamily | Acrotretoidea |
| Family | Acrotretidae |
| Biernatidae | |
| Genus | Biernatia |
| Opsiconidion | |
| Family | Ceratretidae |
| Eoconulidae | |
| Ephippelasmatidae | |
| Scaphelasmatidae | |
| Torynelasmatidae |