The Echinoid Directory

Pygmaeocidaris prionigera Agassiz, 1879. Recent, off Celebes. Drawings of adoral, ambulacrum, adapical ambulacrum, adoral interambulacrum and apical disc. From Mortensen, T. 1935. A monograph of the Echinoidea II. Bothriocidaroida, Melonechinoida, Lepidocentroida and Stirodonta. C. A. Reitzel, Copenhagen.

Diameter of test 13 mm.