2024-03-29T08:54:48Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/367542022-11-17T02:08:08Zhdl_2115_34989hdl_2115_34816hdl_2115_116Lower Devonian Crinoid Pernerocrinus from the Southern Kitakami Mountains, N.E. JapanMinoura, Nachioopen access450Three species of Crotalocrinitidae crinoids, Pernerocrinus hayasaki (Minato and Minoura), P. per-foratus sp. nov. and P. sp. are described. All these species came from the lower part of the Ohno Formation (Lower Devonian) of the southern Kitakami Mountains. The first species was previously describcd as a tabulate coral, Ohnopora hayasakai gen. et sp. nov., belonging to the family Syringolitidae. Robust construction of the Pernerocrinus is interpreted to be especially well adapted to reef environment and its occurrence is strictly confined, at present, to the Lower Devonian.北海道大学Hokkaido University1987-08engdepartmental bulletin paperVoRhttp://hdl.handle.net/2115/367540018-3474北海道大学理学部紀要Jounal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy222337355https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/36754/1/22_2_p337-355.pdfapplication/pdf4.05 MB1987-08