• Cercidochela lankesteri Kirkpatrick, 1907 accepted as Isodictya lankesteri (Kirkpatrick, 1907)
• Homoeodictya alata Stephens, 1915 accepted as Isodictya alata (Stephens, 1915)
• Homoeodictya antarctica (Kirkpatrick, 1908) accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Homoeodictya compressa (Esper, 1797) accepted as Isodictya compressa (Esper, 1797)
• Homoeodictya conulosa (Ridley & Dendy, 1886) accepted as Isodictya conulosa (Ridley & Dendy, 1886)
• Homoeodictya elastica (Vosmaer, 1880) accepted as Isodictya elastica (Vosmaer, 1880)
• Homoeodictya erinacea Topsent, 1916 accepted as Isodictya erinacea (Topsent, 1916)
• Homoeodictya flabelliformis (Hansen, 1885) accepted as Dendoricella flabelliformis (Hansen, 1885)
• Homoeodictya foliata (Bowerbank, 1874) accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Homoeodictya frondosa Lévi, 1963 accepted as Isodictya frondosa (Lévi, 1963)
• Homoeodictya grandis Ridley & Dendy, 1886 accepted as Isodictya grandis (Ridley & Dendy, 1886)
• Homoeodictya kerguelenensis Ridley & Dendy, 1886 accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Homoeodictya kerguelenensis var. simillima Hentschel, 1914 accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Homoeodictya kirkpatricki Topsent, 1916 accepted as Isodictya erinacea (Topsent, 1916)
• Homoeodictya microchela Topsent, 1915 accepted as Isodictya microchela (Topsent, 1915)
• Homoeodictya multiformis Stephens, 1915 accepted as Isodictya multiformis (Stephens, 1915)
• Homoeodictya obliquidens Hentschel, 1914 accepted as Isodictya obliquidens (Hentschel, 1914)
• Homoeodictya palmata (Ellis & Solander, 1786) accepted as Isodictya palmata (Ellis & Solander, 1786)
• Homoeodictya pulviliformis Koltun, 1955 accepted as Isodictya pulviliformis (Koltun, 1955)
• Homoeodictya setifera (Topsent, 1901) accepted as Isodictya setifera (Topsent, 1901)
• Homoeodictya staurophora Hentschel, 1911 accepted as Isodictya staurophora (Hentschel, 1911)
• Homoeodictya trigona Topsent, 1917 accepted as Isodictya trigona (Topsent, 1917)
• Homoeodictya verrucosa Topsent, 1913 accepted as Isodictya verrucosa (Topsent, 1913)
• Ichnodonax kapne de Laubenfels, 1954 accepted as Coelocarteria singaporensis (Carter, 1883)
• Ichnodonax singaporensis (Carter, 1883) accepted as Coelocarteria singaporensis (Carter, 1883)
• Isodictya alata (Stephens, 1915)
• Isodictya alderi Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya anomala Bowerbank, 1866 accepted as Isodictya palmata (Ellis & Solander, 1786)
• Isodictya antarctica (Kirkpatrick, 1908) accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Isodictya aspera Bowerbank, 1877
• Isodictya barleei Bowerbank, 1866 accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Isodictya beanii Bowerbank, 1866 accepted as Antho (Antho) involvens (Schmidt, 1864)
• Isodictya bentarti Rios, Cristobo & Urgorri, 2004
• Isodictya bowerbanki Norman in Bowerbank, 1882 accepted as Haliclona (Reniera) cinerea (Grant, 1826)
• Isodictya cactoides (Kirkpatrick, 1908) accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Isodictya cavicornuta Dendy, 1924
• Isodictya chichatouzae Uriz, 1984
• Isodictya cinerea (Grant, 1826) accepted as Haliclona (Reniera) cinerea (Grant, 1826)
• Isodictya ciocalyptoides (Burton, 1935) accepted as Celtodoryx ciocalyptoides (Burton, 1935)
• Isodictya clarkei Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya clava Bowerbank, 1866 accepted as Haliclona (Haliclona) urceolus (Rathke & Vahl, 1806)
• Isodictya collina Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya compressa (Esper, 1797)
• Isodictya conulosa (Ridley & Dendy, 1886)
• Isodictya coriacea Bowerbank, 1874 accepted as Antho (Acarnia) coriacea (Bowerbank, 1874)
• Isodictya crassa Bowerbank, 1882 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Isodictya cutisanserina Goodwin, Jones, Neely & Brickle, 2016
• Isodictya cymaeformis (Esper, 1806) accepted as Haliclona (Gellius) cymaeformis (Esper, 1806)
• Isodictya deformis Bowerbank, 1882 accepted as Myxilla (Myxilla) rosacea (Lieberkühn, 1859)
• Isodictya deichmannae (de Laubenfels, 1949)
• Isodictya delicata (Thiele, 1905)
• Isodictya delicata var. megachela Burton, 1934 accepted as Isodictya megachela Burton, 1934
• Isodictya densa Bowerbank, 1866 accepted as Haliclona (Haliclona) simulans (Johnston, 1842)
• Isodictya densa sensu Carter, 1887 accepted as Haliclona henrycarteri Van Soest & Hooper, 2020
• Isodictya dichotoma Bowerbank, 1866 accepted as Haliclona (Reniera) cinerea (Grant, 1826)
• Isodictya dicksonii Fristedt, 1887 accepted as Plicatellopsis bowerbanki (Vosmaer, 1885)
• Isodictya dissimilis Bowerbank, 1866 accepted as Axinella dissimilis (Bowerbank, 1866)
• Isodictya donnani Bowerbank, 1873 accepted as Axinella donnani (Bowerbank, 1873)
• Isodictya doryphora (Brøndsted, 1927)
• Isodictya dubia Bowerbank, 1874 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya dufresni Boury-Esnault & van Beveren, 1982
• Isodictya echinata Thomas & Matthew, 1986
• Isodictya ectofibrosa (Lévi, 1963)
• Isodictya edwardii Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya elastica (Vosmaer, 1880)
• Isodictya elegans Bowerbank, 1866 accepted as Haliclona (Reniera) cinerea (Grant, 1826)
• Isodictya erinacea (Topsent, 1916)
• Isodictya fallax Bowerbank, 1866 accepted as Haliclona (Gellius) angulata (Bowerbank, 1866)
• Isodictya ferula Bowerbank, 1882 accepted as Haliclona (Rhizoniera) rosea (Bowerbank, 1866)
• Isodictya filamenta Bowerbank, 1874 accepted as Haliclona (Reniera) cinerea (Grant, 1826)
• Isodictya filiformis Ríos, Riesgo, Taboada & Cristobo, 2020
• Isodictya fimbriata Bowerbank, 1866 accepted as Myxilla (Myxilla) fimbriata (Bowerbank, 1866)
• Isodictya fistulosa Bowerbank, 1866 accepted as Haliclona (Halichoclona) fistulosa (Bowerbank, 1866)
• Isodictya flabelliformis (Hansen, 1885) accepted as Dendoricella flabelliformis (Hansen, 1885)
• Isodictya foliata (Carter, 1885)
• Isodictya foliata Bowerbank in Norman, 1869 accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Isodictya frondosa (Lévi, 1963)
• Isodictya frondosa (Pallas, 1766) accepted as Clathria frondosa (Pallas, 1766)
• Isodictya fucorum (Esper, 1794) accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya funalis Bowerbank in Jeffreys & Norman, 1875 accepted as Myxilla funalis (Bowerbank in Jeffreys & Norman, 1875)
• Isodictya gracilis Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya grandis (Ridley & Dendy, 1886)
• Isodictya grantii (Bowerbank, 1866) accepted as Haliclona (Haliclona) oculata (Linnaeus, 1759)
• Isodictya gregorii Bowerbank, 1866 accepted as Haliclona (Rhizoniera) rosea (Bowerbank, 1866)
• Isodictya hispida Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya histodermella de Laubenfels, 1942
• Isodictya hyndmani (Bowerbank, 1858) accepted as Iophon hyndmani (Bowerbank, 1858)
• Isodictya imitata Bowerbank, 1874 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya implicita Bowerbank, 1882 accepted as Iophon hyndmani (Bowerbank, 1858)
• Isodictya inaequalis Bowerbank, 1882 accepted as Myxilla (Myxilla) rosacea (Lieberkühn, 1859)
• Isodictya incerta Bowerbank, 1874 accepted as Isodictya palmata (Ellis & Solander, 1786)
• Isodictya indefinita Bowerbank, 1866 accepted as Haliclona (Gellius) angulata (Bowerbank, 1866)
• Isodictya indistincta Bowerbank, 1866 accepted as Haliclona (Rhizoniera) indistincta (Bowerbank, 1866)
• Isodictya infundibuliformis (Linnaeus, 1759) accepted as Axinella infundibuliformis (Linnaeus, 1759)
• Isodictya ingalli Bowerbank, 1874 accepted as Haliclona (Haliclona) simulans (Johnston, 1842)
• Isodictya invalida Bowerbank, 1874 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya involuta Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794)
• Isodictya jugosa Bowerbank, 1866 accepted as Haliclona (Gellius) fibulata (Schmidt, 1862)
• Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Isodictya kerguelensis accepted as Isodictya kerguelenensis (Ridley & Dendy, 1886)