- Macraster denisonensis (SMISER, 1936)
- Macraster elegans (SHUMARD, 1853)
- Macraster polygonus (AGASSIZ & DESOR, 1847)
- Macraster texanus (ROEMER, 1888)
- Macraster wenoensis (ADKINS, 1920)
- Macropneustes mortoni (CONRAD, 1850)
- Macropneustes sp. (COTTEAU, 1887)
- Macropygus laganoides (DESOR, 1842)
- Macropygus truncatus (AGASSIZ, 1840)
- Maestratina royoi (LAMBERT, 1928)
- Magnosia decorata (AGASSIZ in DESOR, 1846)
- Magnosia pilos (AGASSIZ, in AGASSIZ & DESOR, 1846)
- Maretia aragonensis VER Leiopatagus aragonensis (COTTEAU, 1887)
- Maretia carolinensis (KIER, 1997)
- Maretia grignonensis (DESMARETS, 1836)
- Maretia planulata (LAMARCK, 1816)
- Maretia subrostrata (CLARCK, 1959)
- Mecaster ameliae (PERON et GAUTHIER, 1878)
- Mecaster batnensis (COQUAND, 1862)
- Mecaster fourneli (DESHAYES, in AGASSIZ & DESOR, 1847)
- Mecaster grossouvrei (GAUTHIER, 1889)
- Mecaster scutiger (FORBES, 1849)
- Mecaster texanus (ROEMER, 1849)
- Megapneustes aff. baylei (COQUAND, 1862)
- Mellita aclinensis (KIER, 1963)
- Mellita caroliniana (RAVENEL, 1841)
- Mellita isometra (HAROLD & TELFORD, 1990)
- Menopygus nodoti (COTTEAU, 1859)
- Mepygurus depressus - Ver Astrolampas
- Merriamaster arnoldi (TWITCHELL)
- Merriamaster perrini (WEAVER, 1908)
- Metaporinus sarthacensis (COTTEAU, 1875)
- Micraster aturicus (HEBBERT IN SEUNES, 1891)
- Micraster brevis (DESOR, 1867)
- Micraster burgiensis (LAMBERT, 1935)
- Micraster carentonensis (LAMBERT, 1895)
- Micraster coranguinum (LESKE, 1778)
- Micraster decipiens (BAYLE, 1878)
- Micraster glyphus (SCHLÜTER, 1869)
- Micraster gosseleti (CAYEUX, 1890)
- Micraster leskei (DESMOULINS, 1837)
- Micraster matheroni (DESOR, 1847)
- Micraster normanniae (BUCAILLE, 1883)
- Micraster quebrada (SCHLÜTER et al., 2023)
- Micraster regularis (ARNAUD in COTTEAU, 1883)
- Micraster schröderi (STOLLEY, 1891)
- Micraster sphaerula (LAMBERT, 1919)
- Micraster turonensis (BAYLE, 1878)
- Microcyphus rousseaui (AGASSIZ, 1846)
- Micropedina olisiponensis (FORBES, 1850)
- Micropsis frossardi (COTTEAU, 1889)
- Micropsis hispanica (COTTEAU, 1882)
- Micropsis leymeriei (COTTEAU, 1856)
- Micropsis cf. pouechi (COTTEAU, 1892)
- Micropsis samperi (COTTEAU, 1890)
- Milnia angularis (AGASSIZ, in AGASSIZ & DESOR, 1847)
-
Milnia guittoni (VADET, NICOLLEAU & PINEAU, 1996)
- Moira aff. lachesinella (MORTENSEN, 1930)
- Moira aff. obesa (NISIYAMA, 1935)
- Moira sp.
- Monodiadema cotteaui (LORIOL, 1889)
- Monophoraster darwini (DESOR, 1847)
- Monostychia australis (LAUBE, 1869)
- Monostychia sp. (LAUBE, 1869) - Oligoceno
- Murciaster sp. ?
- Murravechinus paucituberculatus (GREGORY, 1890)