 Steorra bala (Brazier, 1878) |  Steorra jimfergusoni Stanisic & Potter, 2010 |  Steorra mourilyani (Brazier, 1875) |
 Steorra mulgravensis (Brazier, 1872) |  Steorra rawnsleyi (Cox, 1873) |  Steorra sp. 275292 |
 Steorra tomsoni (Brazier, 1876) |  Steorra worsfoldi Stanisic, 2010 |  Stilpnodiscus entochilus Möllendorff, 1899 |
 Stilpnodiscus moellendorffi M. Wu, 2001 |  Stilpnodiscus stotzneri Blume, 1925 |  Stilpnodiscus yeni M. Wu, 2001 |
 Strepsitaurus cardabius Solem, 1985† |  Strepsitaurus ningaloo Solem, 1997 |  Strepsitaurus rugus (Cotton, 1953) |
 Strepsitaurus williami Solem, 1997 |  Sulcobasis consisa cumingii (Pfeiffer, 1842) |  Sulcobasis minnigerodei Strubell, 1895 |
 Sulcobasis sp. 240467 |  Tatemelon herberti (Iredale, 1937) |  Temporema sardalabiata (Cox, 1871) |
 Temporena juliafoxae Stanisic, 2010 |  Temporena whartoni (Cox, 1871) |  Thelidomus asper (Ferussac, 1821) |
 Thelidomus cognata (Ferussac, 1821) |  Thersites bartschi paulensis Marshall, 1927 |  Thersites cf. bipartidus (Ferussac, 1822) |
 Thersites croftoni (Cox, 1873) |  Thersites gratiosa (Cox, 1871) |  Thersites keppelensis (Iredale, 1937) |
 Thersites mazee (Brazier, 1878) |  Thersites mitifica (Iredale, 1933) |  Thersites mortenseni (Iredale, 1929) |
 Thersites palmensis (Brazier, 1876) |  Thersites rainbirdi (Cox, 1870) |  Thersites richmondianus (Reeve, 1852) |
 Thersites saxicola Iredale, 1937 |  Thersites sp. 64408 |  Thersites yeppoonensis (Beddome, 1897) |
 Tolgachloritis campbelli (Iredale, 1938) |  Tolgachloritis jacksoni (Hedley, 1912) |  Torresitrachia alenae Willan, Kohler, Kessner & Braby, 2009 |
 Torresitrachia cuttacutta Willan, Kohler, Kessner & Braby, 2009 |  Torresitrachia darwini Willan, Kohler, Kessner & Braby, 2009 |  Torresitrachia stipata Iredale, 1938 |
 Torresitrachia torresiana (Humbron & Jacquinot, 1841) |  Torresitrachia wallacei Willan, Kohler, Kessner & Braby, 2009 |  Trachia aff. fallaciosa (Ferussac, 1821) |
 Trachia crassicostata (Benson, 1836) |  Trachia fallaciosa (Férussac, 1832) |  Trachia norodomiana (Morelet, 1883) |
 Trachiopsis mucosa (Cox, 1868) |  Trachiopsis strangulata (Hombron & Jaquinot, 1841) |  Trachygenia praecursis (Hedley, 1912) |
 Trachystyla cryptica (Broderip, 1841) |  Trachystyla cryptica cretata (Broderip, 1841) |  Trachystyla latitans (Sowerby, 1841) |
 Traumatophora triscalpta (E. von Martens, 1875) |  Trichelix biscalpta (Heude, 1885) |  Trichelix hiraseana (Pilsbry, 1905) |
 Trichelix tokunoensis (Pilsbry & Y. Hirase, 1905) |  Trichelix xiaoxiang R.-X. Lin & L.-W. Lin, 2022 |  Tricheulota sanziana (Hombron & Jacquinot, 1841) |
 Tricheulota zodiacus (Ferussac, 1821) |  Tricheulota zodiacus tuba Albers, 1854 |  Trichocathaica amphidroma (Moellendorff, 1899) |
 Trichocathaica goepeliana Yen, 1938 |  Trichocathaica vestita (Pilsbry, 1934) |  Trichochloritis aff. rhinocerotica (Heude, 1890) |
 Trichochloritis breviseta (L. Pfeiffer, 1862) |  Trichochloritis norodomiana (Morlet, 1883) |  Trichochloritis pseudomiara (Bavay & Dautzenberg, 1909) |
 Trishoplita eumenes (Westerlund, 1883) |  Trishoplita eumenes tosana (Gufe, 1900) |  Trishoplita goodwinii (E. A. Smith, 1876) |
 Trishoplita hilgendorfi hilgendorfi (Kobelt, 1879) |  Trishoplita ottoi Pilsbry, 1901 |  Trozena morata Iredale, 1938 |
 Turgenitubulus costus Solem, 1981 |  Turnitubulus tanmurrana Solem, 1985 |  Vincentrachia gregoriana Criscione & Kohler, 2013 |
 Westraltrachia derbyi (Cox, 1892) |  Westraltrachia froggatti froggatti (Ancey, 1898) |  Westraltrachia inopinata Solem, 1984 |
 Westraltrachia rotunda Solem, 1984 |  Westraltrachia tropida Solem, 1984 |  Westraltrachia turbinata Solem, 1984 |
 Xanthomelon darwinense Köhler & Burghardt, 2016 |  Xanthomelon distractum Iredale, 1938 |  Xanthomelon durvillii (Hombron & jacquinot, 1841) |