Check-lists
* List of countries might not be complete
Links and literature
[1] J. C. Brower (1994): Camerate crinoids from the Middle Ordovician (Galena Group, Dunleith Formation) of northern Iowa and southern Minnesota, Journal of Paleontology 68(3):570-599 [as Euptychocrinus skopaios Brower, 1994]
J. C. Brower (1994): Camerate crinoids from the Middle Ordovician (Galena Group, Dunleith Formation) of northern Iowa and southern Minnesota, Journal of Paleontology 68(3):570-599 [as Euptychocrinus skopaios Brower, 1994]