• 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 cavicornuta (Dendy, 1924)
• Homoeodictya compressa (Esper, 1794) accepted as Isodictya compressa (Esper, 1794)
• Homoeodictya conulosa (Ridley & Dendy, 1886) accepted as Isodictya conulosa (Ridley & Dendy, 1886)
• Homoeodictya delicata (Thiele, 1905)
• 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 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 kerguelensis Ridley & Dendy, 1886 accepted as
• 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)
• 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)
• Isodictya alata (Stephens, 1915)
• Isodictya alderi Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya anomala Bowerbank, 1866 accepted as Isodictya palmata (Ellis & Solander, 1786)
• Isodictya antarctica (Kirkpatrick, 1908)
• Isodictya aspera Bowerbank, 1877
• Isodictya barleei Bowerbank, 1866 accepted as Clathria barleei (Bowerbank, 1866)
• Isodictya beanii Bowerbank, 1866 accepted as Antho involvens (Schmidt, 1864)
• Isodictya bentarti Rios, Cristobo & Urgorri, 2004
• Isodictya bowerbanki Norman in Bowerbank, 1882 accepted as Haliclona cinerea (Grant, 1826)
• Isodictya cactoides (Kirkpatrick, 1908)
• Isodictya cavicornuta Dendy, 1924
• Isodictya chichatouzae Uriz, 1984
• Isodictya cinerea (Grant, 1826) accepted as Haliclona cinerea (Grant, 1826)
• Isodictya ciocalyptoides (Burton, 1935)
• Isodictya clarkei Bowerbank, 1866 accepted as Amphilectus lobatus (Montagu, 1818)
• Isodictya clava Bowerbank, 1866 accepted as Haliclona urceolus (Rathe & Vahl, 1806)
• Isodictya collina Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya compressa (Esper, 1794)
• Isodictya conulosa (Ridley & Dendy, 1886)
• Isodictya coriacea Bowerbank, 1874 accepted as Antho coriacea (Bowerbank, 1874)
• Isodictya crassa Bowerbank, 1882 accepted as Halichondria panicea (Pallas, 1766)
• Isodictya deichmannae (de Laubenfels, 1949)
• Isodictya delicata (Thiele, 1905)
• Isodictya densa Bowerbank, 1866 accepted as Haliclona simulans (Johnston, 1842)
• Isodictya dichotoma Bowerbank, 1866 accepted as Haliclona cinerea (Grant, 1826)
• Isodictya dicksoni Fristedt, 1887 accepted as Axinella infundibuliformis (Linnaeus, 1759)
• Isodictya digitata Miklucho-Maclay, 1870 accepted as Neoesperiopsis digitata (Miklucho-Maclay, 1870)
• 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) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya dufresni Boury-Esnault & van Beveren, 1982
• Isodictya echinata Thomas & Matthew, 1986
• Isodictya ectofibrosa (Lévi, 1963)
• Isodictya edwardi Bowerbank, 1866
• Isodictya edwardii Bowerbank, 1866 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya elastica (Vosmaer, 1880)
• Isodictya elegans Bowerbank, 1866 accepted as Haliclona cinerea (Grant, 1826)
• Isodictya erinacea (Topsent, 1916)
• Isodictya fallax Bowerbank, 1866 accepted as Haliclona angulata (Bowerbank, 1866)
• Isodictya ferula Bowerbank, 1866 accepted as Haliclona ferula (Bowerbank, 1866)
• Isodictya fimbriata Bowerbank, 1866 accepted as Myxilla fimbriata (Bowerbank, 1866)
• Isodictya fistulosa Bowerbank, 1866 accepted as Haliclona 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 barleei (Bowerbank, 1866)
• Isodictya frondosa (Lévi, 1963)
• Isodictya frondosa (Pallas, 1766)
• Isodictya fucorum (Esper, 1794) accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis 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) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya grandis (Ridley & Dendy, 1886)
• Isodictya grantii (Bowerbank, 1866) accepted as Haliclona oculata (Pallas, 1766)
• Isodictya gregorii Bowerbank, 1866 accepted as Haliclona rosea (Bowerbank, 1866)
• Isodictya hispida Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis 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) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya implicita Bowerbank, 1882 accepted as Iophon hyndmani (Bowerbank, 1858)
• Isodictya indefinita Bowerbank, 1866 accepted as Haliclona angulata (Bowerbank, 1866)
• Isodictya indistincta Bowerbank, 1866 accepted as Haliclona indistincta (Bowerbank, 1866)
• Isodictya infundibuliformis (Linnaeus, 1759) accepted as Axinella infundibuliformis (Linnaeus, 1759)
• Isodictya ingalli Bowerbank, 1874 accepted as Haliclona simulans (Johnston, 1842)
• Isodictya invalida Bowerbank, 1874 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya involuta Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) accepted as Esperiopsis fucorum (Esper, 1794)
• Isodictya jugosa Bowerbank, 1866 accepted as Haliclona fibulata (Schmidt, 1862)
• Isodictya kerguelenensis (Ridley & Dendy, 1886)
• Isodictya laciniosa Bowerbank in Norman, 1869 accepted as Clathria barleei (Bowerbank, 1866)
• Isodictya lankesteri (Kirkpatrick, 1907)
• Isodictya lenta (Vosmaer, 1880)
• Isodictya lobata (Montagu, 1818) accepted as Amphilectus lobatus (Montagu, 1818)
• Isodictya lurida Bowerbank, 1866 accepted as Myxilla fimbriata (Bowerbank, 1866)
• Isodictya luteosa Bowerbank, 1874 accepted as Haliclona rosea (Bowerbank, 1866)
• Isodictya maeandrina (Kirkpatrick, 1907)
• Isodictya mammeata Bowerbank, 1866 accepted as Haliclona cinerea (Grant, 1826)