Iophon dubius – synonym of Iophon piceus
Iophon pattersoni – synonym of Iophon nigricans
Iophon spinulentum – synonym of Iophon hyndmani
Iophonopsis nigricans – synonym of Iophon nigricans
Iotrochota spinosa – synonym of Iotroata spinosa
Ircinia (Sarcotragus) muscarum – synonym of Sarcotragus muscarum
Ircinia (Sarcotragus) spinosula – synonym of Sarcotragus spinosulus
Ircinia fasciculata dendroides – synonym of Ircinia dendroides
Ircinia muscarum – synonym of Sarcotragus muscarum
Ircinia spinosula – synonym of Sarcotragus spinosulus
Isodictya alderi – synonym of Esperiopsis fucorum
Isodictya barleei – synonym of Clathria barleei
Isodictya beanii – synonym of Antho involvens
Isodictya bowerbanki – synonym of Haliclona cinerea
Isodictya cinerea – synonym of Haliclona cinerea
Isodictya clarkei – synonym of Esperiopsis fucorum
Isodictya clava – synonym of Haliclona urceolus
Isodictya collina – synonym of Esperiopsis fucorum
Isodictya coriacea – synonym of Antho coriacea
Isodictya crassa – synonym of Halichondria panicea
Isodictya densa – synonym of Haliclona simulans
Isodictya dichotoma – synonym of Haliclona cinerea
Isodictya dissimilis – synonym of Axinella polypoides
Isodictya dubia – synonym of Esperiopsis fucorum
Isodictya edwardii – synonym of Esperiopsis fucorum
Isodictya eIegans – synonym of Haliclona cinerea
Isodictya fallax – synonym of Haliclona angulata
Isodictya fistulosa – synonym of Haliclona fistulosa
Isodictya flabelliformis – synonym of Dendoricella flabelliformis
Isodictya fucorum – synonym of Esperiopsis fucorum
Isodictya gracilis – synonym of Esperiopsis fucorum
Isodictya hispida – synonym of Esperiopsis fucorum
Isodictya hyndmani – synonym of Iophon hyndmani
Isodictya imitata – synonym of Esperiopsis fucorum
Isodictya implicita – synonym of Iophon hyndmani
Isodictya incerta – synonym of Halichondria panicea
Isodictya indefinita – synonym of Haliclona angulata
Isodictya indistincta – synonym of Haliclona indistincta
Isodictya infundibuliformis – synonym of Axinella infundibuliformis
Isodictya ingalli – synonym of Haliclona simulans
Isodictya invalida – synonym of Esperiopsis fucorum
Isodictya involuta – synonym of Esperiopsis fucorum
Isodictya jugosa – synonym of Haliclona fibulata
Isodictya laciniosa – synonym of Clathria barleei
Isodictya mammeata – synonym of Haliclona cinerea
Isodictya mcandrewii – synonym of Haliclona fistulosa
Isodictya normani – synonym of Esperiopsis fucorum
Isodictya pallida – synonym of Haliclona cinerea
Isodictya pallida – synonym of Haliclona simulans
Isodictya paupera – synonym of Esperiopsis fucorum
Isodictya peachii – synonym of Haliclona cinerea
Isodictya permollis – synonym of Haliclona cinerea
Isodictya perplexa – synonym of Halichondria panicea
Isodictya pertenuis – synonym of Esperiopsis fucorum
Isodictya pygmaea – synonym of Haliclona oculata
Isodictya ramusculus – synonym of Haliclona cinerea
Isodictya robusta – synonym of Oceanapia robusta
Isodictya scitula – synonym of Esperiopsis fucorum
Isodictya simulans – synonym of Haliclona simulans
Isodictya simulo – synonym of Haliclona cinerea
Isodictya tumulosa – synonym of Myxilla incrustans
Isodictya uniformis – synonym of Esperiopsis fucorum
Isodictya varians – synonym of Haliclona cinerea
Isodictya varians – synonym of Haliclona oculata
Isops pallida – synonym of Isops phlegraei
Isops pyriformis – synonym of Isops phlegraei
Isops sphaeroides – synonym of Isops phlegraei