A. Holotype (NIWA 64828) preserved in ethanol. B. Ortho- triaene. C. Dichotriaene. D. Protriaene. E. Cribriporal pores. F. Sterraster. G. Immature sterraster. H. Mature sterraster rosettes. I. Small strongylspherasters and larger oxyasters (NIWA 64828). (Fig. 36, Sim-Smith & Kelly, 2015)
