Check-lists
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Links and literature
[1] Mergl M. (2001): Lingulate brachiopods of the Silurian and Devonian of the Barrandian (Bohemia, Czech Republic), Acta Mus. Nat. Pragae. Ser. B, Hist. Nat ., 57 (1 - 2): 1 - 49 [as Opsiconidion arcticon Ludvigsen, 1974]
Mergl M. (2001): Lingulate brachiopods of the Silurian and Devonian of the Barrandian (Bohemia, Czech Republic), Acta Mus. Nat. Pragae. Ser. B, Hist. Nat ., 57 (1 - 2): 1 - 49 [as Opsiconidion arcticon Ludvigsen, 1974]