Aselomaris michaeli Berrill, 1948 accepted as Pachycordyle michaeli (Berrill, 1948) (source of synonymy)
Campalecium cirratum (Haeckel, 1879) accepted as Mitrocomium cirratum Haeckel, 1879 accepted as Lovenella cirrata (Haeckel, 1879) (source of synonymy)
Campanopsis adriaticus (Hadzi, 1915) accepted as Eutima gracilis (Forbes & Goodsir, 1853) (source of synonymy)
Clytia pentata (Mayer, 1900) accepted as Pseudoclytia pentata Mayer, 1900 accepted as Clytia folleata (McCrady, 1859) (source of synonymy)
Cordylophora Allman, 1844 (additional source)
Corydendrium Van Beneden, 1844 (additional source)
Cuspidella mertensi (Brandt, 1834) accepted as Staurophora mertensii Brandt, 1835 accepted as Staurostoma mertensii (Brandt, 1835) (source of synonymy)
Cytaeis propagulata (Bavestrello, 1987) accepted as Perarella propagulata Bavestrello, 1987 (basis of record)
Cytaeis schneideri (Motz-Kossowska, 1905) accepted as Perarella schneideri (Motz-Kossowska, 1905) (basis of record)
Dipurena gemmifera (Forbes, 1848) accepted as Stauridiosarsia gemmifera (Forbes, 1848) (basis of record)
Ectopleura crocea (Agassiz, 1862) (additional source)
Eucodoniidae Schuchert, 1996 (basis of record)
Eudendrium simplex Pieper, 1884 (basis of record)
Kirchenpaueria echinulata (Lamarck, 1816) accepted as Kirchenpaueria pinnata (Linnaeus, 1758) (source of synonymy)
Lafoea grandis Hincks, 1874 (source of synonymy)
Lafoea pocillum Hincks, 1868 accepted as Lafoea dumosa (Fleming, 1820) (source of synonymy)
Merona nematophorum (Antsulevich, 1986) accepted as Similomerona nematophora (Antsulevich, 1986) (source of synonymy)
Monotheca posidoniae Picard, 1952 (basis of record)
Ostroumovia inkermanica (Paltschikowa-Ostroumova, 1925) accepted as Moerisia inkermanica Paltschikowa-Ostroumowa, 1925 (source of synonymy)
Pachycordyle pusilla (Motz-Kossowska, 1905) (basis of record)
Phialidium Leuckart, 1856 accepted as Clytia Lamouroux, 1812 (additional source)
Plumularia obliqua (Johnston, 1847) accepted as Monotheca obliqua (Johnston, 1847) (source of synonymy)
Solmissus incisa (Fewkes, 1886) (additional source)
Staurostoma mertensi (Brandt, 1835) accepted as Staurostoma mertensii (Brandt, 1835) (source of synonymy)
Stomotoca georginae (Hadzi, 1913) (source of synonymy)
Stomotoca georginae (Hadzi, 1913) (additional source)
Thuiaria lichenastrum (Linnaeus, 1758) accepted as Thuiaria articulata (Pallas, 1766) (source of synonymy)
Tregoubovia Picard, 1958 (additional source)
Tregoubovia penicillatum (Jarms, 1987) accepted as Thecocodium penicillatum Jarms, 1987 (basis of record)