Monoplex cercadicus (FOSSIL) C.J. Maury, 1917 † Venezuela, Paraguana Peninsula
Monoplex chlorostomoides (FOSSIL) C.J. Maury, 1924 † Brazil, Rio Pirabas
Monoplex comptus (A. Adams, 1855) Philippines, Cebu41,6 mm
Monoplex corrugatus (J.B.P.A. Lamarck, 1816) Italy, Elba Island103 mm
Monoplex dubium (FOSSIL) Noetling, 1895 † Myanmar, Magway
Monoplex durbanensis (E.A. Smith, 1899) South Africa, Port Elizabeth34 mm
Monoplex exaratus (L.A. Reeve, 1844) Australia, Port Hedland53,3 mm
Monoplex exaratus kiiensis (G.B. III Sowerby, 1915) Japan, Kochi34 mm
Monoplex gatunicus (FOSSIL) A.G. Beu, 2010 † Panama, Colón
Monoplex gemmatus (L.A. Reeve, 1844) Hawaii33 mm
Monoplex gurabonicus (FOSSIL) C.J. Maury, 1917 † Dominican Republic34 mm
Monoplex infelix (FOSSIL) C.J. Maury, 1924 † Brazil, Rio Pirabas
Monoplex intermedius W.H. Pease, 1869 Hawaii, Oahu63 mm
Monoplex jackwinorum (FOSSIL) A.G. Beu, 2010 † Venezuela, Paraguana Peninsula
Monoplex keenae (A.G. Beu, 1970) Galapagos112 mm
Monoplex klenei (G.B. III Sowerby, 1889) South Africa, Port Elizabeth52 mm
Monoplex krebsii O.A.L. Mörch, 1877 Canary Islands49 mm
Monoplex kritscheri (FOSSIL) M. Harzhauser, 2014 † India
Monoplex lignarius W.J. Broderip, 1833 Costa Rica47 mm
Monoplex longispira (FOSSIL) A.G. Beu, 2010 † Dominican Republic, Santiago
Monoplex macrodon A. Valenciennes, 1832 Galapagos61 mm
Monoplex mundus Gould, 1849 Hawaii, Oahu38 mm
Monoplex nicobaricus (P.F. Röding, 1798) Cape Verde64,8 mm
Monoplex norai (F. García-Talavera& J.B. Vera, 2004) Uruguay
Monoplex panamensis (FOSSIL) A.G. Beu, 2010 † Panama, Emberá
Monoplex parthenopeus (C.U.A. von Salis-Marschlins, 1793) Angola104,1 mm
Monoplex parthenopeus echo J.T. Kuroda & T. Habe,1961 China, Zhejiang78 mm
Monoplex parthenopeus robusta B.H. Belletante, 1954 138 mm
Monoplex penniketi (A.G. Beu, 1998) India, Tuticorin31,6 mm
Monoplex pilearis (C. Linnaeus, 1758) Mozambique, Nacala Bay78,1 mm
Monoplex pilearis martinianum D'Orbigny, 1846 Canary Islands59,8 mm
Monoplex ritteri (FOSSIL) Schmelz, 1989 † Florida
Monoplex thersites (L.A. Reeve, 1844) Philippines, Sulu Sea43,2 mm
Monoplex tranquebaricus J.B.P.A. Lamarck, 1816 Senegal, Dakar58,9 mm
Monoplex trigonus (J.F. Gmelin, 1791) Angola47,7 mm