Actigia Stechow, 1921 accepted as Coryne Gaertner, 1774 (original description)
Aglaophenia zelandica Stechow, 1921 accepted as Gymnangium longirostre (Kirchenpauer, 1872) (original description)
Astya Stechow, 1921 (original description)
Branchiaria Stechow, 1921 accepted as Branchiocerianthus Mark, 1898 (original description)
Branchiaria mirabilis Stechow, 1921 accepted as Branchiocerianthus mirabilis (Stechow, 1921) (original description)
Branchiocerianthus italicus Stechow, 1921 (original description)
Calya Stechow, 1921 accepted as Ocyropsis Mayer, 1912 (original description)
Campomma Stechow, 1921 accepted as Eucheilota McCrady, 1859 (original description)
Candelabridae Stechow, 1921 (original description)
Candelabrinae Stechow, 1921 accepted as Candelabridae Stechow, 1921 (original description)
Carta Stechow, 1921 † (original description)
Carta pyramidata (Waagen & Wentzel, 1887) † (new combination reference)
Carterina Waagen & Wentzel, 1887 † accepted as Carta Stechow, 1921 † (basis of record)
Carterina pyramidata Waagen & Wentzel, 1887 † accepted as Carta pyramidata (Waagen & Wentzel, 1887) † (basis of record)
Chlorella Stechow, 1921 accepted as Haeckelia Carus, 1863 (original description)
Chlorellidae Stechow, 1921 (original description)
Clathrozoella Stechow, 1921 (original description)
Clathrozoidae Stechow, 1921 (original description)
Clathrozoinae Stechow, 1921 accepted as Clathrozoidae Stechow, 1921 (original description)
Coryne epizoica Stechow, 1921 (original description)
Crateritheca Stechow, 1921 (redescription)
Distichoporinae Stechow, 1921 accepted as Stylasteridae Gray, 1847 (original description)
Errininae Stechow, 1921 accepted as Stylasteridae Gray, 1847 (original description)
Eucalix Stechow, 1921 accepted as Campanularia Lamarck, 1816 (original description)
Euchlora filigera Chun, 1880 accepted as Chlorella filigera (Chun, 1880) accepted as Haeckelia filigera (Chun, 1880) (new combination reference)
Eudendrium elsae-oswaldae Stechow, 1921 accepted as Eudendrium elsaeoswaldae Stechow, 1921 accepted as Eudendrium ramosum (Linnaeus, 1758) (original description)
Galetta Stechow, 1921 accepted as Sulculeolaria Blainville, 1830 (original description)
Galetta australis (Quoy & Gaimard, 1833) accepted as Sulculeolaria biloba (Sars, 1846) (new combination reference)
Galettinae Stechow, 1921 accepted as Sulculeolariinae Totton, 1954 (original description)
Gastra Stechow, 1921 accepted as Lampea Stechow, 1921 (original description)
Gastridae Stechow, 1921 accepted as Lampeidae Stechow, 1921 (original description)
Gastridea (original description)
Gastroidea (original description)
Halocordylidae Stechow, 1921 accepted as Pennariidae McCrady, 1859 (original description)
Helaria Stechow, 1921 (original description)
Helaria bellis accepted as Cereus pedunculatus (Pennant, 1777) (additional source)
Heterotheca Stechow, 1921 accepted as Plumularia Lamarck, 1816 (original description)
Heterotheca sulcata (Lamarck, 1816) accepted as Plumularia sulcata Lamarck, 1816 (basis of record)
Hydractomma Stechow, 1921 accepted as Podocoryna M. Sars, 1846 (original description)
Hydrissa Stechow, 1921 (original description)
Hydronema Stechow, 1921 accepted as Hydractinia Van Beneden, 1844 (original description)
Hydronema dendritica (Hickson & Gravely, 1907) accepted as Hydractinia dendritica Hickson & Gravely, 1907 (new combination reference)
Kirchenpaueriinae Stechow, 1921 accepted as Kirchenpaueriidae Stechow, 1921 (original description)
Lampea Stechow, 1921 (original description)
Lampeidae Stechow, 1921 (original description)
Lampeinae Stechow, 1921 (original description)
Nemella minima (Thompson, 1879) accepted as Amphisbetia minima (Thompson, 1879) (basis of record)
Perigonella Stechow, 1921 (original description)
Phylactothecidae Stechow, 1921 (original description)
Podocorella Stechow, 1921 accepted as Hydractinia Van Beneden, 1844 (original description)
Sertularella miurensis Stechow, 1921 (original description)
Sertularella sagamina Stechow, 1921 (original description)
Stylactaria Stechow, 1921 accepted as Stylactis Allman, 1864 (original description)
Stylactella (Hydractinia) accepted as Perarella Stechow, 1922 (basis of record)
Stylactella (Hydractinia) elseoswaldae Stechow, 1921 accepted as Perarella schneideri (Motz-Kossowska, 1905) (original description)
Sulculeolariinae Totton, 1954 (additional source)
Tulpa Stechow, 1921 (original description)
Zyzzyzus Stechow, 1921 (original description)

Japanese Exclusive Economic Zone for Branchiocerianthus mirabilis (Stechow, 1921) 
Mediterranean Sea for Eudendrium elsae-oswaldae Stechow, 1921 
Mediterranean Sea for Stylactella (Hydractinia) elseoswaldae Stechow, 1921 
Sagami Bay for Sertularella sagamina Stechow, 1921 

 Nomenclature

 for Carterina Waagen & Wentzel, 1887 †

The name Carterina is preoccupied by Carterina Brady, 1884 [details]

 Nomenclature

 for Gastroidea

Named as a class in Cnidaria but with the ctenophore Gastra as type [details]