Abietinaria traski (Torrey, 1902) (additional source)
Antennella paucinoda Fraser, 1935 accepted as Antennella quadriaurita Ritchie, 1909 (additional source)
Cladocarpus bocki Jäderholm, 1919 (additional source)
Cladocarpus crenatus var. allmani Ritchie, 1909 accepted as Cladocarpus crenatus (Fewkes, 1881) (basis of record)
Clytia edwardsi (Nutting, 1901) accepted as Clytia hemisphaerica (Linnaeus, 1767) (basis of record)
Clytia multiannulata Hirohito, 1995 (original description)
Cuspidella gigantea Stechow, 1923 (redescription)
Cuspidella urceolata Hirohito, 1995 (original description)
Dynamena brevis (Fraser, 1935) (additional source)
Dynamena exigua (Allman, 1877) accepted as Dynamena disticha (Bosc, 1802) (additional source)
Dynamena japonica Stechow, 1920 (additional source)
Egmundella humilis Fraser, 1936 (additional source)
Gymnangium indivisum (Fraser, 1936) (additional source)
Gymnangium ishikawai (Stechow, 1908) (additional source)
Gymnangium roretzii (Marktanner-Turneretscher, 1890) (additional source)
Gymnangium vegae (Jäderholm, 1903) (additional source)
Halecium crinis Stechow, 1913 (additional source)
Halecium cymosum Fraser, 1935 (additional source)
Halecium flabellatum Fraser, 1935 (additional source)
Halecium perexiguum Hirohito, 1995 (original description)
Halecium pyriforme Hirohito, 1995 (original description)
Haliaria vegae (Jäderholm, 1903) accepted as Gymnangium vegae (Jäderholm, 1903) (basis of record)
Halicetta expansa (Jäderholm, 1903) accepted as Gymnangium expansum (Jäderholm, 1903) (basis of record)
Halicetta gracilicaulis (Jäderholm, 1903) accepted as Taxella gracilicaulis (Jäderholm, 1903) (basis of record)
Hydrodendron violaceum Hirohito, 1995 (original description)
Lafoea paxi Stechow, 1932 (status source)
Lafoeina vilaevelebiti Hadzi, 1917 (basis of record)
Lytocarpia myriophyllum orientalis (Billard, 1908) accepted as Lytocarpia orientalis (Billard, 1908) (basis of record)
Lytocarpia nigra (Nutting, 1906) (basis of record)
Nemertesia japonica (Stechow, 1907) (redescription)
Plumularia filicaulis var. japonica Jäderholm, 1919 accepted as Plumularia filicaulis Kirchenpauer, 1876 (additional source)
Sagamihydra Hirohito, 1995 accepted as Halecium Oken, 1815 (original description)
Sagamihydra reduplicata (Fraser, 1935) accepted as Halecium reduplicatum (Fraser, 1935) (basis of record)
Scandia brevitheca (Leloup, 1938) accepted as Anthohebella brevitheca (Leloup, 1938) (basis of record)
Scandia najimaensis Hirohito, 1995 accepted as Anthohebella najimaensis (Hirohito, 1995) (original description)
Scandia neglecta (Stechow, 1913) (new combination reference)
Sertularia heteroclada (Jäderholm, 1902) (new combination reference)
Sertularia pyriformis Fraser, 1936 accepted as Salacia pyriformis (Fraser, 1936) (redescription)
Sertularia stechowi Hirohito, 1995 accepted as Bicaularia tongensis (Stechow, 1919) (original description)
Tetrapoma fasciculatum Hirohito, 1995 accepted as Tripoma arboreum Hirohito, 1995 (original description)
Tripoma Hirohito, 1995 (original description)
Tripoma arboreum Hirohito, 1995 (original description)

 Status

 for Hydrodendron pacificum (Stechow, 1913)

Could be conspecific with Hydrodendron leloupi Hirohito, 1983 [details]