Florometra with basal pinnulars enlarged and carinate. P1 and P2 similar in length and number of segments, their relative proportions apparently more constant than in most congeners. Third brachial syzygy usually at 16+17. Cirri 60-100, of 40-65 cirrals, to 65 mm long when first syzygy width is 2.5 mm. Arms up to 200 mm long.
Clark AH, Clark AM (1967) A monograph of the existing crinoids 1(5). Bulletin of the United States National Museum (82):1-860.