Ascidiacea Taxon list
Homoedistoma arenosa (Brewin, 1950) accepted as Ritterella arenosa (Brewin, 1950)
Homoedistoma arenosum (Brewin, 1950) accepted as Ritterella arenosa (Brewin, 1950)
Homoedistoma michaelseni Redikorzev, 1927 accepted as Placentela crystallina Redikorzev, 1913
Homoedistoma novaezealandiae (Brewin, 1950) accepted as Pseudodistoma novaezelandiae (Brewin, 1950)
Homoedistoma omasum Monniot F., 1987 accepted as Condominium areolatum (Kott, 1963)
Placentela areolata Kott, 1963 accepted as Condominium areolatum (Kott, 1963)
Placentela crystallina Redikorzev, 1913
Placentela ellistoni Kott, 1972 accepted as Condominium areolatum (Kott, 1963)
Placentela translucida Kott, 1969
Sigillinaria aequalisiphonis (Ritter & Forsyth, 1917) accepted as Ritterella aequalisiphonis (Ritter & Forsyth, 1917)
Sigillinaria arenosa Brewin, 1950 accepted as Ritterella arenosa (Brewin, 1950)
Sigillinaria aurea Brewin, 1957 accepted as Pseudodistoma aureum (Brewin, 1957)
Sigillinaria clavata Oka, 1933 accepted as Placentela crystallina Redikorzev, 1913
Sigillinaria novaezealandiae Brewin, 1950 accepted as Pseudodistoma novaezelandiae (Brewin, 1950)
Sigillinaria novaezelandiae Brewin, 1950 accepted as Pseudodistoma novaezelandiae (Brewin, 1950)
Sigillinaria opaca Brewin, 1950 accepted as Pseudodistoma opacum (Brewin, 1950)
Sigillinaria pulchra (Ritter, 1901) accepted as Ritterella pulchra (Ritter, 1901)