Tedania conuligera – synonym of Tedania suctoria
Tedania digitata – synonym of Tedania anhelans
Tedania increscens – synonym of Tedania suctoria
Tedania suctoria – synonym of Tedania anhelans
Tedania suctoria – synonym of Tedania suctoria
Terpios tenuiculus – synonym of Terpios gelatinosa
Tethea collingsii – synonym of Stelletta grubii
Tethea cranium – synonym of Tetilla cranium
Tethea lyncurium – synonym of Tethya aurantium
Tethea schmidtii – synonym of Stelletta grubii
Tethea spinularia – synonym of Spinularia spinularia
Tethya aurantia – synonym of Tethya aurantium
Tethya aurantium – synonym of Tethya aurantium
Tethya aurantium – synonym of Tethya norvegica
Tethya carnosa – synonym of Suberites carnosus
Tethya cranium – synonym of Tetilla cranium
Tethya lyncurium – synonym of Tethya aurantium
Tethya muricata – synonym of Thenea muricata
Tethyophaena silifica – synonym of Aaptos aaptos
Thecophora semisuberites – synonym of Tentorium semisuberites
Thrinacophora microdragma – synonym of Axinella infundibuliformis
Timea hallezi crassa – synonym of Timea hallezi
Topsentia annandalei – synonym of Spongosorites annandalei
Topsentia difficilis – synonym of Spongosorites difficilis
Topsentia genitrix – synonym of Spongosorites genitrix
Toxadocia pumicea – synonym of Hemigellius pumiceus
Trachyopsilla glaberrima – synonym of Halichondria panicea
Tragosia alba – synonym of Axinella alba
Tragosia arctica – synonym of Axinella arctica
Tragosia barleei – synonym of Clathria barleei
Tragosia infundibuliformis – synonym of Axinella infundibuliformis
Tragosia polypoides – synonym of Axinella polypoides
Triate discophora – synonym of Erylus discophorus
Trichostemma grimaldi – synonym of Polymastia grimaldi
Tuberella aaptos – synonym of Aaptos aaptos
Tuberella papillata – synonym of Aaptos papillata
Tuberella tethyoides – synonym of Aaptos aaptos
Tylodesma annexa – synonym of Desmacella annexa
Tylodesma inornata – synonym of Desmacella inornata