In synonymy:
Astratea Thorell, 1890 = Medmassa Simon, 1887 (Deeleman-Reinhold, 2001: 345, contra Deeleman-Reinhold, 1995c: 44)
Megaera Simon, 1877 = Medmassa Simon, 1887 (Karsch, 1880c: 374, preoccupied, replacement name)
Homonym replaced:
Megaera Simon, 1877 -- see Medmassa Simon, 1887 - in Karsch, 1880c
Transferred to other genera:
Medmassa andina Simon, 1898 -- see Corinna
Medmassa armata Simon, 1896 -- see Koppe
Medmassa australiensis (L. Koch, 1873) -- see Miturga
Medmassa bicolor Hogg, 1900 -- see Nyssus
Medmassa fusca Hogg, 1900 -- see Nucastia
Medmassa laurenti Lessert, 1946 -- see Mandaneta
Medmassa lesserti Strand, 1916 -- see Procopius
Medmassa nitida Lawrence, 1937 -- see Pronophaea
Medmassa pallipes (L. Koch, 1873) -- see Creugas
Medmassa proxima Lessert, 1923 -- see Pronophaea
Medmassa pusilla Simon, 1896 -- see Creugas
Medmassa semiflava Simon, 1896 -- see Battalus
Medmassa venezuelica Caporiacco, 1955 -- see Corinna
Medmassa vidua Lessert, 1923 -- see Pronophaea
In synonymy:
Medmassa hiekae Berland, 1922 = Medmassa semiaurantiaca Simon, 1909 (Haddad & Bosselaers, 2010: 3)
Nomina dubia:
Medmassa brunneolanceata Caporiacco, 1955: 369 (j, Venezuela) -- Bonaldo, 2000: 34
Medmassa glabra Caporiacco, 1947a: 27 (j, Guyana) -- Bonaldo, 2000: 34
Medmassa nyctalops Simon, 1909f: 377 (f, Equatorial Guinea/Bioko) -- Haddad & Bosselaers, 2010: 11
Medmassa septentrionalis Caporiacco, 1954: 116 (j, French Guiana) -- Bonaldo, 2000: 34