Genus Umbonium H. F. Link, 1807

(5-4-1-3-2-11-13-17-0-0-0-0-0)
Ref. Abbott, 1974 p 40
Abbott & Dance, 1982 p 43
Lindner, 1977 p 37
Syn. Globulus C. F. Schumacher, 1817;
Rotella J. B. P. A. de Lamarck, 1822
Ref. Vaught, 1989 p 10