• Ammonidium T.R. Lister, 1970 †
• Ammonidium belmotiforme (Tynni, 1975) Sarjeant & Vavrdová, 1997 †
• Ammonidium carrascum (Cramer, 1966) Sarjeant & Vavrdová, 1997 †
• Ammonidium cladum (Downie) P.J. Hill †
• Ammonidium cornuatum Loeblich & Wicander, 1976 †
• Ammonidium crinitum (Grishina in Grishina & Klenina, 1981) Sarjeant & Vavrdová, 1997 †
• Ammonidium encantador (F. Cramer) P.J. Hill †
• Ammonidium exoticum Deunff in Lister, 1970 †
• Ammonidium grosjeanii (Stockmans & Willière, 1962) Martin, 1981 †
• Ammonidium hamatum R. Wicander, 1974 †
• Ammonidium inornatum Colbath, 1990 †
• Ammonidium iowaense Wicander & Wood, 1997 †
• Ammonidium listeri M. Smelror, 1987 †
• Ammonidium ludloviense Lister, 1970 ex Dorning, 1981 emend. Mullins, 2001 †
• Ammonidium maravillosum (F.H. Cramer, 1969) Thusu, 1973 †
• Ammonidium maritimum Martin, 1984 †
• Ammonidium microcladum (Downie, 1963) Lister, 1970 †
• Ammonidium microfurcatum (Deunff) Lister †
• Ammonidium microfurcatum (Deunff, 1957) Fensome et al., 1990 †
• Ammonidium multipugiunculata (Cramer & Díez, 1977) Rubinstein, Toro & Waisfeld, 1999 †
• Ammonidium olsztynense (Górka, 1979) Sarjeant & Vavrdová, 1997 †
• Ammonidium paleozoicum (Stockmans & Willière, 1962) Sarjeant & Vavrdová, 1997 †
• Ammonidium palmitella (Cramer & Díez, 1972) Dorning, 1981 †
• Ammonidium pequenhum (Cramer & Díez, 1972) Sarjeant & Vavrdová †
• Ammonidium perhamatum (Eisenack et al., 1979) Sarjeant & Vavrdová, 1997 †
• Ammonidium rigidum (Deunff) Lister †
• Ammonidium sprucegrovense (Staplin) Lister †
• Ammonidium telychense Dorning & Hill, 1991 in White, Barron, Barnes & Lintern, 1991 †
• Ammonidium truncatum (Staplin, 1961) Sarjeant & Vavrdová, 1997 †
• Ammonidium uncinum Loeblich & Wicander, 1976 †
• Ammonidium waldronense (Tappan & Loeblich) Wicander †
• Ammonidium waldronense (Tappan & Loeblich, 1971) Dorning, 1981 †
• Ammonidium wychense Dorning & Hill, 1991 in White, Barron, Barnes & Lintern, 1991 †