Zeuctocrinus with first pinnule on brachial 8 and synostoses between brachials 1+2, 3+4 and 7+8. [details]
[As P. polyarthra] SW Indian Ocean Ridge, between South Africa and Amsterdam Island. Depth: 400 m. [details]
North Atlantic W of Ireland, S of Rockall Bank. Depth range: 2380-2432 m. [details]