The Echinoid Directory
Paleoechinoneus hannai Grant & Hertlein, 1938; holotype. Upper Cretaceous, San Antonio de Mar, Lower California, Mexico. Oral view; from Grant, U. S. & Hertlein, L. G. 1938. The West American Cenozoic Echinoidea. Publications of the University of California at Los Angeles in Mathematical and Physical Sciences 2, 1-225 (pl. 23, fig. 4).
Width of test 23 mm.