1. Forma Rotalia beccarii f. icenica Ten Dam & Reinhold, 1941 † accepted as Ammonia icenica (Ten Dam & Reinhold, 1941) †
2. Forma Rotalia beccarii f. pliocenica Ten Dam & Reinhold, 1941 † accepted as Ammonia pliocenica (Ten Dam & Reinhold, 1941) †
3. Subspecies Rotalia beccarii subsp. hatatatensis Takayanagi, 1952 † accepted as Ammonia hatatatensis (Takayanagi, 1952) †
4. Subspecies Rotalia beccarii subsp. honyaensis Asano, 1953 † accepted as Ammonia honyaensis (Asano, 1953) †
5. Subspecies Rotalia beccarii subsp. karadagica (Dolgopolskaya & Pauli, 1931) accepted as Ammonia karadagica (Dolgopolskaya & Pauli, 1931) (Rotalia beccarii is the type species of Ammonia.)
6. Variety Rotalia beccarii var. angulata Petri, 1954 † accepted as Streblus beccarii var. mendesi Petri, 1955 † accepted as Ammonia mendesi (Petri, 1955) † (unaccepted > junior homonym, Nomen novum in Petri (1955) Junior homonym of Rotalia ketienziensis subsp. angulata Kuwano, 1950)
7. Variety Rotalia beccarii var. annectens Parker & Jones, 1865 accepted as Rotalia annectens Parker & Jones, 1865 accepted as Rotalidium annectens (Parker & Jones, 1865)
8. Variety Rotalia beccarii var. aomoriensis Asano, 1951 † accepted as Ammonia aomoriensis (Asano, 1951) †
9. Variety Rotalia beccarii var. atjehensis van der Vlerk, 1924 † accepted as Ammonia atjehensis (van der Vlerk, 1924) †
10. Variety Rotalia beccarii var. baganensis LeRoy, 1939 † accepted as Ammonia baganensis (LeRoy, 1939) †
11. Variety Rotalia beccarii var. dentata Parker & Jones, 1865 accepted as Asterorotalia dentata (Parker & Jones, 1865) (Opinion of Billman et al. (1980))
12. Variety Rotalia beccarii var. flevensis Hofker, 1930 accepted as Ammonia flevensis (Hofker, 1930)
13. Variety Rotalia beccarii var. gigantica LeRoy, 1939 † accepted as Ammonia gigantica (LeRoy, 1939) †
14. Variety Rotalia beccarii var. globula Colom, 1936 † accepted as Ammonia globula (Colom, 1936) †
15. Variety Rotalia beccarii var. koeboeensis LeRoy, 1939 † accepted as Ammonia koeboeensis (LeRoy, 1939) †
16. Variety Rotalia beccarii var. lucida Madsen, 1895 † accepted as Ammonia lucida (Madsen, 1895) †
17. Variety Rotalia beccarii var. ornata Cushman, 1918 † accepted as Ammonia ornata (Cushman, 1918) †
18. Variety Rotalia beccarii var. parkinsoniana (d'Orbigny, 1839) accepted as Streblus parkinsonianus (d'Orbigny, 1839) accepted as Ammonia parkinsoniana (d'Orbigny, 1839) (Opinion of Hofker (1964))
19. Variety Rotalia beccarii var. ripleyensis Berry, 1929 † accepted as Ammonia ripleyensis (Berry, 1929) †
20. Variety Rotalia beccarii var. sobrina Shupack, 1934 accepted as Ammonia sobrina (Shupack, 1934)
21. Variety Rotalia beccarii var. tepida Cushman, 1926 accepted as Ammonia tepida (Cushman, 1926)
22. Variety Rotalia beccarii var. texana Applin, Ellisor & Kniker, 1925 † accepted as Ammonia texana (Applin, Ellisor & Kniker, 1925) †
23. Variety Rotalia beccarii var. craticulata Parker & Jones, 1865 (uncertain > nomen dubium, Type specimen from Fiji is an aberrant trochospiral form of an Elphidium (B. Hayward pers. obs. 2020))
24. Variety Rotalia beccarii var. risilla Didkovskiy, 1959 (uncertain > taxon inquirendum, Not figured and very succinctly described ["Rotalia beccarii (L.) var. risilla var. n. which has very small size shell without any surface ornamentation"~nomen nudum])

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