This genus is known in the fossil records from the Devonian period to the Carboniferous period (age range: 370.6 to 342.8 million years ago). Fossils of species within this genus have been found in Belgium, Canada, United States, Australia and China.
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References
^L. G. de Koninck and H. Le Hon, 1854 Recherches sur les crinoïdes du terrain carbonifère de la Belgique, Bruxelles, M. Hayez, imprimeur, 1854.