• Modulus J. E. Gray, 1842
• Modulus ambiguus Dautzenberg, 1910
• Modulus basteroti Benoist, 1874 †
• Modulus basteroti var. rotundolaevis Sacco, 1904 † (uncertain > unassessed)
• Modulus bayeri Petuch, 2001
• Modulus benoisti Lozouet, Cahuzac & Charles, 2020 †
• Modulus bermontianus Petuch, 1994
• Modulus biconicus J. A. Gardner, 1947 †
• Modulus caloosahatchiensis Petuch, 1994 †
• Modulus calusa Petuch, 1988 accepted as Trochomodulus calusa (Petuch, 1988)
• Modulus calusa calusa Petuch, 1988 accepted as Trochomodulus calusa calusa (Petuch, 1988)
• Modulus calusa foxhalli Petuch & R. F. Myers, 2014 accepted as Trochomodulus calusa foxhalli (Petuch & R. F. Myers, 2014)
• Modulus canaliculatus Mörch, 1876 accepted as Modulus modulus (Linnaeus, 1758)
• Modulus candidus Petit de la Saussaye, 1853 accepted as Indomodulus tectum (Gmelin, 1791)
• Modulus carchedonius (Lamarck, 1822) accepted as Trochomodulus carchedonius (Lamarck, 1822)
• Modulus catenulatus (R. A. Philippi, 1849) accepted as Trochomodulus catenulatus (R. A. Philippi, 1849)
• Modulus cerodes A. Adams, 1851
• Modulus cidaris Reeve, 1848 accepted as Modulus tectum (Gmelin, 1791) accepted as Indomodulus tectum (Gmelin, 1791)
• Modulus compactus Dall, 1892 †
• Modulus convexior Mörch, 1876 accepted as Modulus modulus (Linnaeus, 1758)
• Modulus danielsi Petuch & Berschauer, 2023
• Modulus disculus (R. A. Philippi, 1846)
• Modulus dorsuosus A. Gould, 1853 accepted as Modulus disculus (R. A. Philippi, 1846)
• Modulus duplicatus A. Adams, 1851 (uncertain > taxon inquirendum)
• Modulus floridanus Conrad, 1869
• Modulus guernei Dautzenberg, 1900
• Modulus hennequini Petuch, 2013
• Modulus honkerorum Petuch, 2013
• Modulus hunahpu Petuch & Berschauer, 2023
• Modulus imitatus Schmelz, 1991 †
• Modulus kaicherae Petuch, 1987
• Modulus krebsii Mörch, 1876 accepted as Modulus modulus (Linnaeus, 1758)
• Modulus lenticularis (Lamarck, 1822) accepted as Modulus modulus (Linnaeus, 1758)
• Modulus lindae Petuch, 1987 accepted as Conomodulus lindae (Petuch, 1987)
• Modulus lindae gervaini Paulmier, 1997
• Modulus liveoakensis Mansfield, 1937 †
• Modulus modulus (Linnaeus, 1758)
• Modulus modulus var. basileus (Guppy, 1873) † accepted as Trochomodulus basileus (Guppy, 1873)
• Modulus morleti P. Fischer, 1882 (uncertain > taxon inquirendum)
• Modulus nodosus Macsotay & Campos, 2001
• Modulus obliquatus [sic] accepted as Modulus obliquus A. Adams, 1851
• Modulus obliquus A. Adams, 1851 (uncertain > taxon inquirendum)
• Modulus obtusatus (R. A. Philippi, 1847) (uncertain > taxon inquirendum)
• Modulus pacei Petuch, 1987
• Modulus perlatus (Gmelin, 1791) accepted as Modulus modulus (Linnaeus, 1758)
• Modulus pisum Mörch, 1876 accepted as Modulus modulus (Linnaeus, 1758)
• Modulus preangerensis K. Martin, 1905 † accepted as Conomodulus preangerensis (K. Martin, 1905) †
• Modulus tamanensis Maury, 1925 † accepted as Trochomodulus tamanensis (Maury, 1925) †
• Modulus tectum (Gmelin, 1791) accepted as Indomodulus tectum (Gmelin, 1791)
• Modulus trochiformis Souleyet, 1852 accepted as Trochomodulus catenulatus (R. A. Philippi, 1849)
• Modulus turbinatus (Heilprin, 1886) †
• Modulus turbinoides (Locard, 1897)
• Modulus unidens (A. d'Orbigny, 1842) accepted as Modulus modulus (Linnaeus, 1758)
• Modulus vermeiji Landau & C. M. Silva, 2010 † accepted as Trochomodulus vermeiji (Landau & C. M. Silva, 2010) †
• Modulus willcoxii Dall, 1892 † accepted as Trochomodulus willcoxii (Dall, 1892) †
• Modulus woodringi Mansfield, 1930 †