Check-lists
* List of countries might not be complete
Links and literature
[1] Vaněk J., Valíček J. (2002): New index of the genera, subgenera and species of Barrandian trilobites. Part C-D (Silurian and Devonian) ver. 2013/09, Paleontologia Bohemiae vol. VIII, Praha [as Harpidella infrequens Přibyl et Vaněk et Hörbinger, 1985]
Vaněk J., Valíček J. (2002): New index of the genera, subgenera and species of Barrandian trilobites. Part C-D (Silurian and Devonian) ver. 2013/09, Paleontologia Bohemiae vol. VIII, Praha [as Harpidella infrequens Přibyl et Vaněk et Hörbinger, 1985]