The Echinoid Directory
Echanthus georgiensis Twitchell, 1915; holotype. Clayton Formation, Palaeocene, Ellaville, Georgia, USA. From C. W. Cooke. 1959. Cenozoic echinoids of eastern United States. United States Geological Survey, Professional Paper, 321, 106 pp., 43 pls (plate 26, fig. 15). Lateral view (anterior to right).
Length of test 40.5 mm.