original description
Clark, A. H. (1907). A new species of crinoid (Ptilocrinus pinnatus) from the Pacific Coast, with a note on Bathycrinus. <em>Proceedings of the U.S. National Museum.</em> 32:551–554. [details]
basis of record
Roux M, Lambert P (2011) Two new species of stalked crinoids from the northeastern Pacific in the genera <i>Gephyrocrinus</i> and <i>Ptilocrinus</i> (Echinodermata, Crinoidea, Hyocrinidae). Effects of ontogeny and variability on hyocrinid taxonomy. <i>Zootaxa</i> 2825:1–54. [details]
additional source
Eléaume, Marc (look up in IMIS) [details]
additional source
Hess H. (2011). Hyocrinida. <em>In: Hess H, Messing CG, Ausich WI (Eds.), Treatise on Invertebrate Paleontology, Part T, Echinodermata 2 Revised, Crinoidea, vol. 3. University of Kansas Press, Lawrence, Kansas.</em> 172–179. [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Classification Placed in family Plicatocrinidae by Clarke & Johnston (2003). [details]