• Testacarinata Jenkins, 1971 †
• Testacarinata inconspicua Howe, 1939 †
• Testacella Lamarck, 1801
• Testacella (Testacella) Lamarck, 1801 represented as Testacella Lamarck, 1801
• Testacella (Testacella) bisulcata Risso, 1826 represented as Testacella bisulcata Risso, 1826
• Testacella (Testacella) bracciai Nardi & Bodon, 2011 represented as Testacella bracciai Nardi & Bodon, 2011
• Testacella (Testacella) haliotidea Draparnaud, 1801 represented as Testacella haliotidea Draparnaud, 1801
• Testacella (Testacella) maugei A. Férussac, 1819 represented as Testacella maugei A. Férussac, 1819
• Testacella (Testacella) riedeli Fo. Giusti, Manganelli & Schembri, 1995 represented as Testacella riedeli Fo. Giusti, Manganelli & Schembri, 1995
• Testacella (Testacella) scutulum G. B. Sowerby I, 1821 represented as Testacella scutulum G. B. Sowerby I, 1821
• Testacella (Testacelloides) A. J. Wagner, 1914 represented as Testacella Lamarck, 1801
• Testacella (Testacelloides) gestroi Issel, 1873 represented as Testacella gestroi Issel, 1873
• Testacella anglica Grateloup, 1855 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacella anomala Torres Minguez, 1924 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella antillarum Grateloup, 1855 (unaccepted > nomen nudum)
• Testacella asinium de Serres, 1827 †
• Testacella barcinonensis Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella beccarii Issel, 1868 (uncertain > unassessed)
• Testacella bisulcata Risso, 1826
• Testacella bisulcata f. major Gassies & Fischer, 1856 accepted as Testacella fischeriana Bourguignat, 1862
• Testacella bourguignati Massot, 1870 accepted as Testacella bisulcata Risso, 1826
• Testacella bracciai Nardi & Bodon, 2011
• Testacella brondeli Bourguignat, 1862 accepted as Testacella fischeriana Bourguignat, 1862
• Testacella bruntoniana de Serres, 1851 †
• Testacella burdigalensis Gassies, 1855 (unaccepted > nomen nudum)
• Testacella canariensis Grateloup, 1855 accepted as Testacella maugei A. Férussac, 1819
• Testacella catalonica Pollonera, 1888 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacella companyonii Dupuy, 1847 (uncertain > taxon inquirendum)
• Testacella deshayesii Michaud, 1855 †
• Testacella dikrangensis Godwin-Austen, 1876 accepted as Girasia dikrangensis (Godwin-Austen, 1876)
• Testacella drymonia Bourguignat, 1862 accepted as Testacella haliotidea var. trigona Gassies & Fischer, 1856 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella dubia Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella episcia Bourguignat, 1861 (uncertain > unassessed)
• Testacella esserana Fagot, 1892 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella europaea de Roissy, 1805 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella fischeriana Bourguignat, 1862
• Testacella galliae Oken, 1816 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella galloprovincialis Grateloup, 1855 accepted as Testacella bisulcata Risso, 1826
• Testacella germanica Oken, 1815 accepted as Vitrina elongata Draparnaud, 1805 accepted as Semilimax semilimax (J. B. Férussac, 1802)
• Testacella gestroi Issel, 1873
• Testacella guadeloupensis R. P. Lesson, 1835 accepted as Omalonyx unguis (A. d'Orbigny, 1836)
• Testacella haliotidea Draparnaud, 1801
• Testacella haliotidea var. scutulum G. B. Sowerby I, 1821 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacella haliotidea var. trigona Gassies & Fischer, 1856 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella larteti [sic] † accepted as Testacella lartetii Dupuy, 1850 †
• Testacella larteti tagica Wenz, 1922 † accepted as Testacella lartetii tagica Wenz, 1922 †
• Testacella lartetii Dupuy, 1850 †
• Testacella lartetii tagica Wenz, 1922 †
• Testacella lidenbrocki Quintana, 2022
• Testacella matheronii Potiez & Michaud, 1838 accepted as Omalonyx unguis (A. d'Orbigny, 1836)
• Testacella maugei A. Férussac, 1819
• Testacella oceanica Grateloup, 1855 accepted as Testacella maugei A. Férussac, 1819
• Testacella pascali Bourguignat, 1870 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella pecchiolii Bourguignat, 1862 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacella pedemontana Sacco, 1886 †
• Testacella pontileviensis de Morgan, 1920 †
• Testacella puisseguri Schlickum, 1967 †
• Testacella riedeli Fo. Giusti, Manganelli & Schembri, 1995
• Testacella sandbergeri Wenz, 1915 †
• Testacella saulcyi Bourguignat, 1852 accepted as Libania saulcyi (Bourguignat, 1852)
• Testacella schuetti Schlickum, 1967 †
• Testacella scutulum G. B. Sowerby I, 1821
• Testacella servaini Massot, 1870 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella sicula Bivona, 1839 accepted as Daudebardia (Daudebardia) brevipes sicula Bivona, 1839 accepted as Daudebardia brevipes (Draparnaud, 1805)
• Testacella stabilei Pini, 1879 (uncertain > taxon inquirendum)
• Testacella subtrigona Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella vagans F. W. Hutton, 1882 accepted as Testacella maugei A. Férussac, 1819
• Testacella williamsiana G. Nevill, 1880 † (uncertain > taxon inquirendum)
• Testacella zellii Klein, 1853 †
• Testacellidae J. E. Gray, 1840
• Testacellinae J. E. Gray, 1840 accepted as Testacellidae J. E. Gray, 1840
• Testacelloidea J. E. Gray, 1840
• Testacellus Montfort, 1810 accepted as Testacella Lamarck, 1801
• Testacellus ambiguus Férussac, 1819 accepted as Parmacella olivieri Cuvier, 1805
• Testacellus scutatum Lesson, 1838 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacellus scutulum G. B. Sowerby I, 1821 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testallium Vermeij & DeVries, 1997 †
• Testallium cepa (G. B. Sowerby I, 1846) †
• Testallium escalonia Vermeij & DeVries, 1997 † accepted as Macron escalonia (Vermeij & DeVries, 1997) †
• Testaprica Percival, 2009 †
• Testaprica rhodesi Percival, 2009 †
• Testechiniscus Kristensen, 1987
• Testechiniscus clavisetosus (Mihelčič, 1958) accepted as Testechiniscus spitsbergensis (Scourfield, 1897)
• Testechiniscus laterculus (Schuster, Grigarick & Toftner, 1980)
• Testechiniscus macronyx (Richters, 1908)
• Testechiniscus meridionalis (Murray, 1906)
• Testechiniscus spinuloides (Murray, 1907) accepted as Testechiniscus spitsbergensis (Scourfield, 1897)
• Testechiniscus spitsbergensis (Scourfield, 1897)
• Testechiniscus spitsbergensis spitsbergensis (Scourfield, 1897)
• Testechiniscus spitsbergensis tropicalis Gąsiorek, Stec, Zawierucha, Kristensen & Michalczyk, 2018
• Testeria Faust, 2003
• Testeria novellus Faust, 2003
• Testeria steidingerae Faust, 2003
• Testiculoporus Kinsella & Deblock, 1997
• Testiculoporus cedarkeyensis Kinsella & Deblock, 1997
• Testiculoporus minuta (Ke, 1979) Kinsella & Deblock, 1997
• Testiculoporus papilloprocera (Ke, 1980) Kinsella & Deblock, 1997
• Testifrondosa Bhalerao, 1924 accepted as Artyfechinostomum Lane, 1915
• Testifrondosa cristata Bhalerao, 1924 accepted as Artyfechinostomum sufrartyfex Lane, 1915
• Testisacculus Bhalerao, 1927 accepted as Artyfechinostomum Lane, 1915