This genus is known in the fossil record from the Devonian period to the Permian period (age range: 360.7 to 290.1 million years ago).[3] Fossils of species within this genus have been found in Australia, China, Europe and United States.[4]
^John Samuel Miller, 1821 A natural history of the Crinoidea, or lily-shaped animals : with observations on the genera, Asteria, Euryale, Comatula & Marsupites Published for the author by C. Frost [etc.], 1821.