Tauberia gracilis – synonym of Levinsenia gracilis
Tauberia gracilis Strelzov, 1873 – synonym of Levinsenia gracilis
Terebella artifex – synonym of Lanice conchilega
Terebella artifex Sars, 1863 – synonym of Lanice conchilega
Terebella conchilega – synonym of Lanice conchilega
Terebella conchilega Moebius, 1874 – synonym of Lanice conchilega
Terebella danielsseni – synonym of Eupolymnia nesidensis
Terebella danielsseni Malmgren, 1866 – synonym of Eupolymnia nesidensis
Terebella debilis – synonym of Eupolymnia nebulosa
Terebella debilis Malmgren, 1866 – synonym of Eupolymnia nebulosa
Terebella figulus – synonym of Neoamphitrite figulus
Terebella figulus Dalyell, 1853 – synonym of Neoamphitrite figulus
Terebella gracilis – synonym of Amphitritides gracilis
Terebella gracilis Grube, 1860 – synonym of Amphitritides gracilis
Terebella infundibulum – synonym of Myxicola infundibulum
Terebella infundibulum Renier, 1804 – synonym of Myxicola infundibulum
Terebella maculata – synonym of Axionice maculata
Terebella maculata Dalyell, 1853 – synonym of Axionice maculata
Terebella montagui – synonym of Amphitrite cirrata
Terebella montagui Quatrefages, 1865 – synonym of Amphitrite cirrata
Terebella nebulosa – synonym of Eupolymnia nebulosa
Terebella nebulosa Montagu, 1818 – synonym of Eupolymnia nebulosa
Terebella tentaculata – synonym of Cirriformia tentaculata
Terebella tentaculata Montagu, 1808 – synonym of Cirriformia tentaculata
Terebella venustula – synonym of Nicolea venustula
Terebella venustula Montagu, 1818 – synonym of Nicolea venustula
Terebella zostericola – synonym of Nicolea zostericola
Terebella zostericola Oersted, 1844 in Grube, 1860 – synonym of Nicolea zostericola
Terebellides gracilis – synonym of Terebellides stroemi
Terebellides gracilis Malm, 1874 – synonym of Terebellides stroemi
Terebellides Stroemii Sars, 1853 – synonym of Terebellides stroemi
Thalassochaetus palpifoliaceus
Thalassochaetus palpifoliaceus Ax, 1954 – synonym of Thalassochaetus palpifoliaceus
Thallasema scutatum – synonym of Sternaspis scutata
Thallasema scutatum Ranzani, 1817 – synonym of Sternaspis scutata
Tharyx killariensis Blake, 1991 – synonym of Tharyx killariensis
Tharyx marioni – synonym of Aphelochaeta marioni
Tharyx marioni – synonym of Tharyx killariensis
Tharyx marioni Farke, 1979 (non Saint-Joseph) – synonym of Tharyx killariensis
Tharyx marioni Fauvel, 1927 – synonym of Aphelochaeta marioni
Tharyx multibranchis – synonym of Aphelochaeta multibranchis
Tharyx multibranchis Fauvel, 1927 – synonym of Aphelochaeta multibranchis
Tharyx vivipara – synonym of Aphelochaeta vivipara
Tharyx vivipara Christie, 1984 – synonym of Aphelochaeta vivipara
Thelepodopsis flava – synonym of Thelepus cincinnatus
Thelepodopsis flava Sars, 1872 – synonym of Thelepus cincinnatus
Thelepus bergmanni – synonym of Thelepus cincinnatus
Thelepus bergmanni Leuckart, 1849 – synonym of Thelepus cincinnatus
Thelepus cincinnatus Hessle, 1917 – synonym of Thelepus cincinnatus
Thelepus circinnatus – synonym of Thelepus cincinnatus
Thelepus circinnatus Malmgren, 1866 – synonym of Thelepus cincinnatus
Thoracophelia flabelligera – synonym of Euzonus flabelligerus
Thoracophelia flabelligera Ziegelmeier, 1955 – synonym of Euzonus flabelligerus
Tomopteris helgolandica Greeff, 1879 – synonym of Tomopteris helgolandica
Tomopteris septentrionalis Quatrefages, 1865 – synonym of Tomopteris septentrionalis
Trachelophyllum lütkeni – synonym of Notophyllum foliosum
Trachelophyllum lütkeni Levinsen,1883 – synonym of Notophyllum foliosum
Travisia forbesii Johnston, 1840 – synonym of Travisia forbesii
Trichobranchus glacialis Malmgren, 1866 – synonym of Trichobranchus glacialis
Trichobranchus roseus Hessle, 1917 – synonym of Trichobranchus roseus
Tricoelia variopedatus – synonym of Chaetopterus variopedatus
Tricoelia variopedatus Renier, 1804 – synonym of Chaetopterus variopedatus
Trilobodrilus axi Westheide, 1967 – synonym of Trilobodrilus axi
Trilobodrilus heideri Remane, 1925 – synonym of Trilobodrilus heideri
Trochochaeta multisetosa Pettibone, 1963 – synonym of Trochochaeta multisetosa
Trochochaeta sarsi – synonym of Trochochaeta multisetosa
Trochochaeta sarsi Levinsen, 1883 – synonym of Trochochaeta multisetosa
Troglochaetus beranecki Delachaux, 1921 – synonym of Troglochaetus beranecki
Trophonia flabellata – synonym of Pherusa flabellata
Trophonia flabellata Sars, 1872 – synonym of Pherusa flabellata
Trophonia glauca – synonym of Diplocirrus glaucus
Trophonia glauca Malmgren, 1867 – synonym of Diplocirrus glaucus
Trophonia plumosa – synonym of Pherusa plumosa
Trophonia plumosa Moebius, 1874 – synonym of Pherusa plumosa
Tubularia stellaris – synonym of Fabricia stellaris
Tubularia stellaris Müller, 1774 – synonym of Fabricia stellaris
Typosyllis armillaris Hartmann-Schröder, 1971 – synonym of Typosyllis armillaris
Typosyllis cornuta Hartmann-Schröder, 1971 – synonym of Typosyllis cornuta
Typosyllis hyalina Hartmann-Schröder, 1971 – synonym of Typosyllis hyalina
Typosyllis variegata Hartmann-Schröder, 1971 – synonym of Typosyllis variegata