Lotzeites aberrans (FOSSIL) (Kossmat, 1895 †)
Graysonites adkinsi (FOSSIL) A.T. Young, 1958 † Japan, Hokkaido, Horokanai
Cunningtoniceras africanum (FOSSIL) (Pervinquiére, 1907 †) Algeria
Romaniceras alamitosensis (FOSSIL) (Aguilera 1895 †) Cuba
Dunveganoceras albertense (FOSSIL) (Warren, 1930 †) Canada, Alberta, Division No. 19
Newboldiceras algeriense (FOSSIL) J. Kennedy & A.S. Gale,2017 † Algeria
Acanthoceras alvaradoense (FOSSIL) Moreman, 1942 † Texas
Alzadites alzadensis (FOSSIL) J. Kennedy & Cobban,1990 † USA, Montana, Carter
Acanthoceras amphibolum (FOSSIL) C.C. Morrow, 1935 † USA, New Mexico
Watinoceras amudariense (FOSSIL) (Arkhanguelsky, 1916 †) Brazil, Sergipe, Laranjeiras
Kamerunoceras andinum (FOSSIL) Renz, 1982 † Spain, Soria
Pseudocalycoceras angolaense (FOSSIL) Spath, 1931 † Arizona, Coconino County
Newboldiceras annulatum (FOSSIL) M. Collignon, 1964 † Nigeria, Calabar90 mm
Kamerunoceras antsaronense (FOSSIL) M. Collignon, 1965 †
Cunningtoniceras arizonense (FOSSIL) Kirkland & Cobban, 1986 † USA, New Mexico
Protacanthoceras arkelli (FOSSIL) Wright & J. Kennedy,1980 †
Pseudaspidoceras armatum (FOSSIL) Pervinquiére, 1907 † Russia, Moneron Island
Jeanrogericeras asflaensis (FOSSIL) Meister & al., 2017 † Morocco
Protacanthoceras asgeirri (FOSSIL) Wright & Kennedy, 1980 † UK, Dorset
Newboldiceras asiaticum (FOSSIL) (Jimbo, 1894 †) France, Alpes-de-Haute-Provence154 mm
Newboldiceras asiaticum spinosum (FOSSIL) (Kossmat, 1897 †) Madagascar200 mm
Acanthoceras athabascense (FOSSIL) Warren & Stelck, 1955 †
Mantelliceras aumalense (FOSSIL) (Coquand 1862 †) Madagascar19 mm
Pseudaspidoceras auriculatum (FOSSIL) (M. Collignon, 1965 †) Madagascar185 mm
Sharpeiceras australe (FOSSIL) J. Kennedy, 2014 † Madagascar, Toliary, Atsimo-Andrefana
Pseudaspidoceras barberi (FOSSIL) Meister, 1989 † Nigeria, Gombe, Funakaye91 mm
Eucalycoceras batnense (FOSSIL) (M. Collignon, 1937 †) Algeria
Acanthoceras bellense (FOSSIL) Adkins, 1928 †
Plesiacanthoceras bellsanum (FOSSIL) (L.W. Stephenson, 1953 †) United States, Texas, Grayson
Sumitomoceras bentonianum (FOSSIL) Cragin, 1893 † Texas, Ellis County
Benueites benueensis (FOSSIL) Reyment, 1954 † Cameroon, Sud-Ouest, Fako
Metoicoceras bergquisti (FOSSIL) Cobban, 1983 † USA, Minnesota, Itasca
Proeucalycoceras besairieri (FOSSIL) M. Collignon, 1937 †
Romaniceras bifurcata (FOSSIL) (Aguilera 1895 †) Cuba
Buchiceras bilobatum (FOSSIL) A. Hyatt, 1875 † Egypt, Shamal Sina', Shurtah al-Qasimah