Acanthodoris pina Ev. Marcus & Er. Marcus, 1967 (additional source)
Aclis tumens P. P. Carpenter, 1857 (basis of record)
Acteocina carinata (P. P. Carpenter, 1857) accepted as Acteocina inculta (A. Gould, 1855) (basis of record)
Acteocina inculta (A. Gould, 1855) (basis of record)
Acteocina infrequens (C. B. Adams, 1852) (additional source)
Acteon castus (Hinds, 1844) (additional source)
Acteon panamensis Dall, 1908 (basis of record)
Acteon traskii Stearns, 1897 (basis of record)
Acteon venustus (A. d'Orbigny, 1840) (basis of record)
Alaba guayaquilensis Bartsch, 1928 (basis of record)
Alaba interruptelineata Pilsbry & H. N. Lowe, 1932 (basis of record)
Alaba jeanettae Bartsch, 1910 (basis of record)
Alaba supralirata P. P. Carpenter, 1857 (basis of record)
Alabina effusa (P. P. Carpenter, 1857) (basis of record)
Alabina excurvata (P. P. Carpenter, 1857) (basis of record)
Alabina ignati Bartsch, 1911 (basis of record)
Alabina monicensis Bartsch, 1911 † (basis of record)
Alabina veraguaensis A. M. Strong & Hertlein, 1939 (basis of record)
Amerycina colpoica (Dall, 1913) (basis of record)
Amerycina cultrata Keen, 1971 (original description)
Anabathridae Keen, 1971 (original description)
Anachis fayae Keen, 1971 (original description)
Ancula lentiginosa Farmer, 1964 (basis of record)
Anticlimax (Subclimax) Pilsbry & Olsson, 1950 represented as Anticlimax Pilsbry & T. L. McGinty, 1946 (additional source)
Anticlimax (Subclimax) willetti Hertlein & A. M. Strong, 1951 represented as Anticlimax willetti Hertlein & A. M. Strong, 1951 (basis of record)
Antiopella barbarensis (J. G. Cooper, 1863) (basis of record)
Aorotrema humboldti (Hertlein & A. M. Strong, 1951) (basis of record)
Arene adusta J. H. McLean, 1970 (basis of record)
Arene balboai (A. M. Strong & Hertlein, 1939) (basis of record)
Arene echinata J. H. McLean, 1970 (basis of record)
Arene ferruginosa J. H. McLean, 1970 (basis of record)
Arene fricki (Crosse, 1865) (basis of record)
Arene guttata J. H. McLean, 1970 (basis of record)
Arene hindsiana Pilsbry & H. N. Lowe, 1932 (basis of record)
Arene lurida (Dall, 1913) (basis of record)
Arene olivacea (Dall, 1918) (basis of record)
Arene socorroensis (A. M. Strong, 1934) (basis of record)
Arene stellata J. H. McLean, 1970 (basis of record)
Assiminea compacta (P. P. Carpenter, 1864) (basis of record)
Assiminea dubiosa (C. B. Adams, 1852) (basis of record)
Astraea spirata (Dall, 1911) accepted as Pomaulax spiratus (Dall, 1911) (basis of record)
Atys liriope Hertlein & A. M. Strong, 1951 (basis of record)
Barleeia alderi (P. P. Carpenter, 1857) (basis of record)
Barleeia bentleyi Bartsch, 1920 (basis of record)
Barleeia carpenteri Bartsch, 1920 (basis of record)
Barleeia orcutti Bartsch, 1920 (basis of record)
Barleeia polychroma (de Folin, 1870) (basis of record)
Bathybembix galapagana (Dall, 1908) (basis of record)
Batillaria mutata (Pilsbry & Vanatta, 1902) (basis of record)
Berghia amakusana (Baba, 1937) (basis of record)
Berthellina ilisima Ev. Marcus & Er. Marcus, 1967 (additional source)
Bittium arenaense Hertlein & A. M. Strong, 1951 (basis of record)
Bittium cerralvoense Bartsch, 1911 (basis of record)
Bittium decussatum (P. P. Carpenter, 1857) (basis of record)
Bittium mexicanum Bartsch, 1911 (basis of record)
Bittium nicholsi Bartsch, 1911 (basis of record)
Bittium nitens P. P. Carpenter, 1864 (basis of record)
Bittium panamense Bartsch, 1911 (basis of record)
Bittium peruvianum (A. d'Orbigny, 1841) (basis of record)
Calliostoma eximium (Reeve, 1843) (basis of record)
Calliostoma insigne Olsson, 1971 (basis of record)
Calliostoma iridium Dall, 1896 (basis of record)
Calliostoma joanneae Olsson, 1971 (basis of record)
Calliostoma keenae J. H. McLean, 1970 (basis of record)
Calliostoma marshalli H. N. Lowe, 1935 (basis of record)
Calliostoma mcleani Shasky & G. B. Campbell, 1964 (basis of record)
Calliostoma nepheloide Dall, 1913 (basis of record)
Calliostoma palmeri Dall, 1871 (basis of record)
Calliostoma sanjaimense J. H. McLean, 1970 (basis of record)
Calliostoma santacruzanum J. H. McLean, 1970 (basis of record)
Calliostoma veleroae J. H. McLean, 1970 (basis of record)
Calyptraea conica Broderip, 1834 (basis of record)
Calyptraea lichen Broderip, 1834 (basis of record)
Calyptraea mamillaris Broderip, 1834 (basis of record)
Calyptraea spirata (Forbes, 1852) (basis of record)
Calyptraea subreflexa (P. P. Carpenter, 1856) (basis of record)
Calyptraea ventricosa (P. P. Carpenter, 1857) (basis of record)
Cantharus rehderi S. S. Berry, 1962 (basis of record)
Capulus sericeus J. Q. Burch & R. L. Burch, 1961 (basis of record)
Carinaria cithara W. H. Benson, 1835 (basis of record)
Carinaria cristata (Linnaeus, 1767) (basis of record)
Carinaria galea W. H. Benson, 1835 (basis of record)
Carinaria japonica Okutani, 1955 (basis of record)
Cerberilla pungoarena Collier & Farmer, 1964 (basis of record)
Cerithioderma Conrad, 1860 (basis of record)
Cerithioderma pacifica Dall, 1908 accepted as Provanna pacifica (Dall, 1908) (basis of record)
Cerithiopsis anaitis Bartsch, 1917 (basis of record)
Cerithiopsis aurea Bartsch, 1911 (basis of record)
Cerithiopsis bicolor Bartsch, 1911 (basis of record)
Cerithiopsis bristolae F. Baker, G. D. Hanna & A. M. Strong, 1938 (basis of record)
Cerithiopsis cerea P. P. Carpenter, 1857 (basis of record)
Cerithiopsis curtata Bartsch, 1911 (basis of record)
Cerithiopsis destrugesi (de Folin, 1867) (basis of record)
Cerithiopsis eiseni A. M. Strong & Hertlein, 1939 (basis of record)
Cerithiopsis galapagensis Bartsch, 1911 (basis of record)
Cerithiopsis gissleri A. M. Strong & Hertlein, 1939 (basis of record)
Cerithiopsis guanacastensis Hertlein & A. M. Strong, 1951 (basis of record)
Cerithiopsis guatulcoensis Hertlein & A. M. Strong, 1951 (basis of record)
Cerithiopsis halia Bartsch, 1911 (basis of record)
Cerithiopsis infrequens (C. B. Adams, 1852) (basis of record)