1832  Planulites Münster: 5 [non Lamarck,1801, non Parkinson, 1821].
     1834  Clymenia Münster: 67 [nov.nom. pro Planulites Münster,1832].
     1835  Clymenites Münster: 334 [nom.nud.]
     1838  Endosiphonites Ansted: 416.
     1884  Oxyclymenia Hyatt: 313 [obj. synonym].
     1902  Clymenia.- Frech: 29.
     1908  Orthoclymenia Wedekind: 619 [obj. synonym].
     1914  Laevigites Wedekind: 47 [nom.nud.].
     1947  Laevigites.- Nalivkina: 179.
     1949  Oxyclymenia.- Schindewolf: 69.
     1955  Clymenia.- Schindewolf: 418.
     1957  Clymenia.- Treatise: L44.
     1960  Clymenia.- Ruzhentsev: 243.
     1962  Clymenia.- Osnovy: 408.
     2002  Clymenia.-Korn & Klug: 248.
     2005  Clymenia.-Nikolaeva & Bogoslovskii: 141.

      Type species: Planulites laevigatus Münster, 1832, p. 5.

A:   Conch form discoidal, venter and flanks broadly rounded; umbilicus wide to extremely wide.
B:   Growth lines very faint, nearly rectiradiate.
C-D: No ribs, no constrictions.
D:   No constrictions or terminal constriction.
G:  Ventral saddle of medium height. Lateral lobe asymmetric with steep dorsal flank.