• 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 Férussac, 1819
• Testacella (Testacella) riedeli Giusti, Manganelli & Schembri, 1995 represented as Testacella riedeli 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 anomala Torres Minquez, 1924 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella antillarum Grateloup, 1855 (unaccepted > nomen nudum)
• Testacella asinium Serres, 1827 †
• Testacella barcinonensis Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella bisulcata Risso, 1826
• Testacella bracciai Nardi & Bodon, 2011
• Testacella bruntoniana Serres, 1851 †
• Testacella catalonica Pollonera, 1888 accepted as Testacella scutulum G. B. Sowerby I, 1821
• Testacella deshayesii Michaud, 1855 †
• Testacella dikrangensis Godwin-Austen, 1876 accepted as Girasia dikrangensis (Godwin-Austen, 1876)
• Testacella dubia Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• 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 gestroi Issel, 1873
• Testacella guadeloupensis Lesson, 1838 accepted as Omalonyx unguis (d'Orbigny, 1836)
• Testacella haliotidea Draparnaud, 1801
• Testacella larteti Dupuy, 1850 † 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 matheronii Potiez & Michaud, 1838 accepted as Omalonyx unguis (d'Orbigny, 1836)
• Testacella maugei Férussac, 1819
• Testacella pedemontana Sacco, 1886 †
• Testacella pontileviensis de Morgan, 1920 †
• Testacella puisseguri Schlickum, 1967 †
• Testacella riedeli Giusti, Manganelli & Schembri, 1995
• Testacella sandbergeri Wenz in Fischer & Wenz, 1914 †
• Testacella saulcyi Bourguignat, 1852 (uncertain > taxon inquirendum)
• Testacella schuetti Schlickum, 1967 †
• Testacella scutulum G. B. Sowerby I, 1821
• Testacella subtrigona Pollonera, 1888 accepted as Testacella haliotidea Draparnaud, 1801
• Testacella vagans F. W. Hutton, 1882 accepted as Testacella maugei Férussac, 1819
• Testacella williamsiana G. Nevill, 1880 † (uncertain > taxon inquirendum)
• Testacella zellii Klein, 1853 †
• Testacellidae Gray, 1840
• Testacelloidea Gray, 1840
• Testacellus Montfort, 1810 accepted as Testacella Lamarck, 1801
• Testacellus scutulum G. B. Sowerby I, 1821 (uncertain > taxon inquirendum)
• Testechiniscus Kristensen, 1987
• Testechiniscus clavisetosus (Mihelčič, 1958) accepted as Testechiniscus spitsbergensis (Scourfield, 1897)
• Testechiniscus laterculus (Schuster, Grigarick & Toftner, 1980)
• Testechiniscus macronyx (Richters, 1907)
• Testechiniscus meridionalis (Murray, 1906)
• Testechiniscus spinuloides (Murray, 1907) accepted as Testechiniscus spitsbergensis (Scourfield, 1897)
• Testechiniscus spitsbergensis (Scourfield, 1897)
• 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
• Testisacculus indicus Bhalerao, 1927
• Testudinaceae Arx, 1971
• Testudinalia Moskalev, 1966
• Testudinalia scutum (Rathke, 1833) accepted as Lottia scutum (Rathke, 1833)
• Testudinalia tessellata (O. F. Müller, 1776) accepted as Testudinalia tessulata (O. F. Müller, 1776) accepted as Testudinalia testudinalis (O. F. Müller, 1776)
• Testudinalia tessulata (O. F. Müller, 1776) accepted as Testudinalia testudinalis (O. F. Müller, 1776)
• Testudinalia testudinalis (O. F. Müller, 1776)
• Testudinaster Hess, 1983 †
• Testudinaster peregrinus Hess, 1983 †
• Testudinella Bory de St. Vincent, 1826
• Testudinella clypeata (Müller, 1786)
• Testudinella elliptica (Ehrenberg, 1834)
• Testudinella obscura Althaus, 1957
• Testudinella patina (Hermann, 1783)
• Testudinellidae Harring, 1913
• Testudines
• Testudinidae Batsch, 1788
• Testudinoidea Fitzinger, 1826
• Testudo Linnaeus, 1758
• Testudo amboinensis Daudin, 1802 accepted as Cuora amboinensis (Daudin, 1802)
• Testudo caretta Linnaeus, 1758 accepted as Caretta caretta (Linnaeus, 1758)
• Testudo carolina Linnaeus, 1758 accepted as Terrapene carolina (Linnaeus, 1758)
• Testudo cartilaginea Boddaert, 1770 accepted as Amyda cartilaginea (Boddaert, 1770)
• Testudo caspica Gmelin, 1774 accepted as Mauremys caspica (Gmelin, 1774)
• Testudo concinna LeConte, 1830 accepted as Pseudemys concinna (LeConte, 1830)
• Testudo coriacea Vandelli, 1761 accepted as Dermochelys coriacea (Vandelli, 1761)
• Testudo ferox Schneider, 1783 accepted as Apalone ferox (Schneider, 1783)
• Testudo fimbriata Schneider, 1783 accepted as Chelus fimbriata (Schneider, 1783)
• Testudo galeata Schoepff, 1792 accepted as Pelomedusa galeata (Schoepff, 1792)
• Testudo geographica Lesueur, 1817 accepted as Graptemys geographica (Lesueur, 1817)
• Testudo graeca Linnaeus, 1758