Fig. 3
Expanded plate diagrams for three disparid crinoids from an aboral view; radial circlet configuration given below each disparid, the order is A, B, C, D, and E, as explained in the text: a Iocrinus subcrassus with only the C ray with a compound radial plate; b two compound radial plates (C and E rays) in Columbicrinus crassus; c Peniculocrinus milleri with five compound radial plates. Radial plates and superradial plates filled with black shading; inferradial plates with horizontal ruling; posterior plates with stippled pattern, anal X plate indicated with an X; and arrows indicate position where brachials are fixed, if above the distal margin of the radial plate circlet. Not to scale