Check-lists
* List of countries might not be complete
Links and literature
[1] Havlíček V. (1994): Kvania n. g. and Petrocrania Raymond (Brachiopoda, Ordovician) in the Prague Basin, Journal of the Czech Geological Society 39/4 [as Petrocrania obsoleta (Barrande, 1848)]
Havlíček V. (1994): Kvania n. g. and Petrocrania Raymond (Brachiopoda, Ordovician) in the Prague Basin, Journal of the Czech Geological Society 39/4 [as Petrocrania obsoleta (Barrande, 1848)]