Tachysoma saltans – synonym of Actinotricha saltans
Tetrapetalon elegans – synonym of Heliosoma echinaster
Tetrapyle octacantha – synonym of Octopyle stenozona
Tetronychoteuthis dussumieri – synonym of Pholidoteuthis boschmai
Teuthowenia antarctica – synonym of Galiteuthis glacialis
Thecosphaera radians – synonym of Actinomma sol
Thelidioteuthis alessandrinii – synonym of Ancistrocheirus lesueurii
Theocalyptra davisiana – synonym of Cycladophora davisiana
Theoconus hertwigii – synonym of Pterocorys hertwigii
Theoconus junionis – synonym of Lamprocyrtis hannai
Theoconus minythorax – synonym of Pterocorys minythorax
Theoconus zancleus – synonym of Pterocorys zancleus
Tholonium spp. – synonym of Cubotholus spp.
Tintinnidium semiciliatum – synonym of Tintinnidium sp.
Tintinnidium sp. aff. semiciliatum – synonym of Tintinnidium sp.
Tintinnopsis amphora – synonym of Tintinnopsis amphora/nucula
Tintinnopsis aperta var. a – synonym of Tintinnopsis tocantinensis
Tintinnopsis avellana – synonym of Stenosemella avellana
Tintinnopsis baltica var. a – synonym of Tintinnopsis baltica
Tintinnopsis beroidea var. compressa – synonym of Tintinnopsis compressa
Tintinnopsis brasiliensis – synonym of Tintinnopsis lobiancoi/brasiliensis
Tintinnopsis buetschlii, var. buetschlii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis buetschlii, var. mortensenii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis bütschlii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis Butschlii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis bütschlii, var. mortensenii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis campanula/butschlii
Tintinnopsis cyathus – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis cyathus var. annulata – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis cylindrica – synonym of Tintinnopsis radix
Tintinnopsis davidoffi var. cylindrica – synonym of Tintinnopsis radix
Tintinnopsis davidoffi var. laevis – synonym of Tintinnopsis pusilla/laevis
Tintinnopsis Davidoffii var. cylindrica – synonym of Tintinnopsis radix
Tintinnopsis denticulata – synonym of Tintinnopsis baltica
Tintinnopsis fracta – synonym of Tintinnopsis radix
Tintinnopsis glans – synonym of Tintinnopsis parva
Tintinnopsis gracilis – synonym of Tintinnopsis parvula
Tintinnopsis karajacensis var. a – synonym of Tintinnopsis parvula
Tintinnopsis lata – synonym of Tintinnopsis lobiancoi/brasiliensis
Tintinnopsis levigata – synonym of Tintinnopsis pusilla/laevis
Tintinnopsis Lobiancoi – synonym of Tintinnopsis lobiancoi/brasiliensis
Tintinnopsis lobiancoi var. fusiformis – synonym of Tintinnopsis amphora/nucula
Tintinnopsis lobiancoi/brasiliensis
Tintinnopsis meunieri – synonym of Tintinnopsis fimbriata
Tintinnopsis Mortensenii – synonym of Tintinnopsis campanula/butschlii
Tintinnopsis nucula – synonym of Tintinnopsis amphora/nucula
Tintinnopsis platensis – synonym of Stylicauda platensis
Tintinnopsis pusilla – synonym of Tintinnopsis pusilla/laevis
Tintinnopsis turbinata – synonym of Tintinnopsis parva
Tintinnus amphora – synonym of Amphorides amphora
Tintinnus amphora var. brasiliensis – synonym of Amphorides quadrilineata
Tintinnus amphora var. c – synonym of Amphorides calida
Tintinnus amphora var. dadayi – synonym of Amphorides laackmanni
Tintinnus ampulla – synonym of Petalotricha ampulla
Tintinnus antarcticus – synonym of Cymatocylis antarctica
Tintinnus apertus – synonym of Eutintinnus apertus
Tintinnus attenuatus – synonym of Eutintinnus attenuatus
Tintinnus bulbosus – synonym of Dadayiella ganymedes
Tintinnus bulbosus var. a – synonym of Dadayiella ganymedes
Tintinnus campanula – synonym of Tintinnopsis campanula/butschlii
Tintinnus caudatus – synonym of Parundella caudata
Tintinnus claparèdii – synonym of Undella claparedei-group
Tintinnus colligatus – synonym of Eutintinnus attenuatus
Tintinnus conicus – synonym of Ormosella cornucopia
Tintinnus costatus – synonym of Salpingella costata
Tintinnus datura – synonym of Daturella datura
Tintinnus ehrenbergi – synonym of Favella ehrenbergii
Tintinnus elongatus – synonym of Eutintinnus fraknoi
Tintinnus emarginatus – synonym of Daturella emarginata
Tintinnus fraknoi var. a – synonym of Eutintinnus fraknoi
Tintinnus Fraknóii – synonym of Eutintinnus fraknoi
Tintinnus Ganymedes – synonym of Dadayiella ganymedes
Tintinnus hastatus – synonym of Xystonellopsis hastata
Tintinnus lusus undae – synonym of Eutintinnus lusus-undae
Tintinnus lusus-undae "main species" – synonym of Eutintinnus lusus-undae
Tintinnus lusus-undae var. c – synonym of Eutintinnus attenuatus
Tintinnus lusus-undae var. macilentus – synonym of Daturella emarginata
Tintinnus mediterraneus var. longa – synonym of Helicostomella subulata
Tintinnus medius – synonym of Eutintinnus medius
Tintinnus palliatus – synonym of Brandtiella palliata
Tintinnus patagonicus – synonym of Helicostomella subulata
Tintinnus quadrilineatus – synonym of Amphorides quadrilineata
Tintinnus quinquealatus – synonym of Amphorellopsis quinquealata
Tintinnus regulatus – synonym of Salpingella regulata
Tintinnus semiciliatus – synonym of Tintinnidium sp.
Tintinnus serratus – synonym of Favella serrata
Tintinnus spiralis – synonym of Rhabdonella spiralis
Tintinnus steenstrupii – synonym of Steenstrupiella steenstrupii
Tintinnus stelidium – synonym of Stelidiella stelidium
Tintinnus striatus – synonym of Rhabdonella spiralis
Tintinnus subulatus – synonym of Helicostomella subulata
Tintinnus tubiflora – synonym of Daturella datura
Tintinnus urceolatus: Brandt, 1906-1907 – synonym of Metacylis jorgenseni
Tintinnus urceolatus: Ostenfeld, 1899a, b – synonym of Ascampbelliella urceolata
Tokophrya campanula – synonym of Pelagacineta campanula
Tokophrya interrupta – synonym of Pelagacineta interrupta
Torquatella typica – synonym of Strobilidium typicum
Trachelocerca laevis – synonym of Enchelyodon laevis
Trachelocerca phoenicopterus – synonym of Tracheloraphis phoenicopterus
Trachelocerca sulcata – synonym of Enchelyodon laevis
Trichodina auerbachi – synonym of Licnophora auerbachi
Trichotaxis crassa – synonym of Trichototaxis crassa
Triospyris antarctica – synonym of Triceraspyris antarctica