The Echinoid Directory
Waurnia nelsoni (McCoy, 1882): Late Oligocene of Waurn Ponds, Victoria, Australia. Posterior view (from K.J.McNamara & G.M. Philip 1984. A revision of the spatangoid echinoid Pericosmus from the Tertiary of Australia. Records of the Western Australia Museum 11, 319-356; fig. 23).
Width of specimen 70 mm.