The Echinoid Directory
Tiaromma michelini (Desor, 1856), University of Lyon Palaeontology Collections EM40407 (figured by Cotteau, G. 1864 Paleontologie francaise Terrain Cretace, VII Echinides regulier, pl. 1114, figs 1-5). Cenomanian, Upper Cretaceous, Villers-sur-Mer, Calvados, France. Lateral view, detail.
Diameter of test 22.3 mm.