Bouillon, Boero, Cicogna, Gili and Hughes, 1992
See Hy. 1 Introduction and further for more about hydromedusae.
Six subclasses which cover the South Atlantic species.
Subclass Anthomedusae Haeckel, 1879
Subclass Leptomedusae Haeckel, 1886
Subclass Laingiomedusae Bouillon, 1978
Subclass Limnomedusae Kramp, 1938
Subclass Narcomedusae Haeckel, 1879
Subclass Trachymedusae Haeckel, 1866