Aaptos adriatica – synonym of Aaptos aaptos
Acarnus polytylus – synonym of Acarnus tortilis
Acarnus stelliferus – synonym of Hymeraphia stellifera
Acca infesta – synonym of Aka infesta
Acca insidiosa – synonym of Aka infesta
Acca rodens – synonym of Aka infesta
Acervochalina gracilenta – synonym of Acervochalina limbata
Adocia cinerea – synonym of Haliclona cinerea
Adocia cinerea – synonym of Haliclona simulans
Adocia densa – synonym of Haliclona simulans
Adocia fistulosa – synonym of Haliclona fistulosa
Adocia indistincta – synonym of Haliclona indistincta
Adocia mcandrewii – synonym of Haliclona fistulosa
Adocia simulans – synonym of Haliclona simulans
Adocia urceolus – synonym of Haliclona urceolus
Aka labyrinthica – synonym of Aka infesta
Alcyonium aurantium – synonym of Tethya aurantium
Alcyonium bursa – synonym of Weberella bursa
Alcyonium epiphytum – synonym of Prosuberites epiphytum
Alcyonium ficus – synonym of Suberites ficus
Alcyonium lyncurium – synonym of Tethya aurantium
Alcyonium manus diaboli – synonym of Halichondria panicea
Alcyonium medullare – synonym of Halichondria panicea
Alcyonium paniceum – synonym of Halichondria panicea
Alcyonium papillosum – synonym of Halichondria panicea
Alcyonium tubulosum – synonym of Halichondria panicea
Alebion piceum – synonym of Iophon piceus
Amorphina albescens – synonym of Halichondria panicea
Amorphina angulata – synonym of Haliclona angulata
Amorphina appendiculata – synonym of Halichondria panicea
Amorphina caruncula – synonym of Hymeniacidon perlevis
Amorphina coalita – synonym of Halichondria bowerbanki
Amorphina coccinea – synonym of Halichondria panicea
Amorphina connexa – synonym of Haliclona angulata
Amorphina couchii – synonym of Haliclona fibulata
Amorphina fallaciosa – synonym of Halichondria panicea
Amorphina fragilis – synonym of Halichondria panicea
Amorphina genitrix – synonym of Spongosorites genitrix
Amorphina glabra – synonym of Halichondria panicea
Amorphina grisea – synonym of Halichondria panicea
Amorphina lactea – synonym of Halichondria panicea
Amorphina membrana – synonym of Halichondria panicea
Amorphina paciscens – synonym of Halichondria panicea
Amorphina panicea – synonym of Halichondria panicea
Amorphina reticulata – synonym of Halichondria panicea
Amorphina sevosa – synonym of Halichondria panicea
Amorphina thomasii – synonym of Halichondria panicea
Amphilectus armatus – synonym of Clathria armata
Amphilectus clarkei – synonym of Esperiopsis fucorum
Amphilectus compressus – synonym of Esperiopsis fucorum
Amphilectus dubius – synonym of Esperiopsis fucorum
Amphilectus edwardii – synonym of Esperiopsis fucorum
Amphilectus foliata – synonym of Clathria barleei
Amphilectus fucorum – synonym of Esperiopsis fucorum
Amphilectus gracilis – synonym of Esperiopsis fucorum
Amphilectus imitatus – synonym of Esperiopsis fucorum
Amphilectus incrustans – synonym of Myxilla incrustans
Amphilectus korenii – synonym of Biemna variantia
Amphilectus laciniosa – synonym of Clathria barleei
Amphilectus spinulenta – synonym of Iophon hyndmani
Amphoriscus chrysalis – synonym of Amphoriscus oviparus
Amphoriscus echinus – synonym of Leucilla echinus
Anchinoe fictitia – synonym of Phorbas fictitius
Anchinoe fictitius – synonym of Phorbas fictitius
Anchinoe perarmatus – synonym of Phorbas neptuni
Ancorina aaptos – synonym of Aaptos aaptos
Ancorina verruca – synonym of Ancorina cerebrum
Antho involvens var. inconstans – synonym of Antho inconstans
Aphroceras cliarensis – synonym of Aphroceras ensata
Aphroceras ensata cliarensis – synonym of Aphroceras ensata
Aphroceras ensata including forma impressa and forma syconoides – synonym of Aphroceras ensata
Aphroceras ramosa – synonym of Heteropia ramosa
Aplysilla arenosa – synonym of Chelonaplysilla noevus
Aplysilla sulfurea – synonym of Aplysilla rosea
Aplysilla sulphurea – synonym of Aplysilla rosea
Aplysina corneostellata – synonym of Darwinella corneostellata
Aplysina cruor – synonym of Aplysilla rosea
Aplysina noevus – synonym of Chelonaplysilla noevus
Aplysina zetlandica – synonym of Spongionella pulchella
Artemisina arcigera – synonym of Artemisina arciger
Artemisina foliata – synonym of Clathria barleei
Artemisina hispanica – synonym of Artemisina transiens
Artemisina mediterranea – synonym of Antho involvens
Artemisina suberitoides – synonym of Artemisina arciger
Ascaltis botryoides – synonym of Leucosolenia botryoides
Ascaltis contorta – synonym of Clathrina contorta
Ascaltis lacunosa – synonym of Guancha lacunosa
Ascandra angulata – synonym of Guancha lacunosa
Ascandra botryoides – synonym of Leucosolenia botryoides
Ascandra complicata – synonym of Leucosolenia complicata
Ascandra complicata – synonym of Leucosolenia variabilis
Ascandra contorta – synonym of Clathrina contorta
Ascandra corallorhiza – synonym of Leucosolenia variabilis
Ascandra tenuis – synonym of Leucosolenia variabilis
Ascandra variabilis – synonym of Leucosolenia variabilis
Ascetta clathrus – synonym of Clathrina clathrus
Ascetta spinosa – synonym of Clathrina contorta
Ascortis corallorhiza – synonym of Leucosolenia variabilis
Ascortis fabricii – synonym of Leucosolenia variabilis
Ascortis lacunosa – synonym of Guancha lacunosa
Asychus variantia – synonym of Biemna variantia
Aulorrhiza intestinalis – synonym of Ascaltis lamarcki
Axinella agnata – synonym of Raspailia agnata
Axinella barleei – synonym of Clathria barleei
Axinella dissimilis – synonym of Axinella polypoides
Axinella distorta – synonym of Axinella polypoides
Axinella erecta – synonym of Bubaris vermiculata
Axinosia incrustans – synonym of Esperiopsis fucorum