Taxonomic names from J. Watson and C. A. Sincock 1992
- Bennetticarpus, Harris 1932 [Bennettitales]
- Bennetticarpus antoinetteae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Bennetticarpus madamae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Bennetticarpus nataliae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Bennetticarpus oxylepidus, Harris 1932 [Bennettitales]
- Bennettistemon, Harris 1932 [Bennettitales]
- Bennettistemon amblum, Harris 1932 [Bennettitales]
- Bennettistemon valdensis (Edwards 1921) [Bennettitales]
- Bucklandia florovia, J. Watson and C. A. Sincock 1992 [Cycadeoideales]
- Cycadeoidea, Buckland 1828 [Bennettitaceae]
- Cycadeoidea dacotensis (Ward) [Bennettitaceae]
- Cycadeoidea gibsoniana [unclassified species]
- Cycadeoidea megalophylla, Buckland 1828 [Bennettitaceae]
- Cycadeoidea saxbyana, Morris [unclassified species]
- Cycadolepis, Saporta 1875 [Bennettitales]
- Cycadolepis cedricii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Cycadolepis crawleyeana, J. Watson and C. A. Sincock 1992 [unclassified species]
- Cycadolepis cromwellensis, J. Watson and C. A. Sincock 1992 [unclassified species]
- Cycadolepis markii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Cycadolepis shuteana, J. Watson and C. A. Sincock 1992 [unclassified species]
- Cycadolepis villosa, Saporta 1875 [Bennettitales]
- Monanthesia, Wieland 1934 [Bennettitales]
- Monanthesia magnifica, Wieland 1934 [Bennettitales]
- Nilssoniopteris, Nathorst 1909 [Bennettitales]
- Nilssoniopteris waterhouseii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Otozamites, Braun 1843 [Bennettitales]
- Otozamites titaniae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Pseudocycas dunkeriana, Goeppert [unclassified species]
- Pseudocycas insignis, Nathorst 1907 [Bennettitales]
- Pseudocycas lesleyae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Pseudocycas roemeri, Holden 1914 [unclassified species]
- Pseudocycas saportae, Holden 1914 [unclassified species]
- Pterophyllum, Brongniart 1828 [Bennettitales]
- Pterophyllum brongniartii, Morris 1841 [unclassified species]
- Pterophyllum fontarianum, J. Watson and C. A. Sincock 1992 [unclassified species]
- Pterophyllum longifolium, Brongniart 1828 [Bennettitales]
- Pterophyllum lyellianum, Dunker 1846 [unclassified species]
- Ptilophyllum, Morris 1840 [Bennettitales]
- Ptilophyllum acutifolium, Morris 1840 [Bennettitales]
- Ptilophyllum ashleyi, J. Watson and C. A. Sincock 1992 [unclassified species]
- Ptilophyllum marksilveri, J. Watson and C. A. Sincock 1992 [unclassified species]
- Ptilophyllum sibleyae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Ptilophyllum sirfredii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Ptilophyllum sirkennethii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Sphenozamites, A. Brongniart 1849 [Cycadaceae]
- Weltrichia, Braun 1843 [Bennettitales]
- Wielandiella, Nathorst 1910 [Bennettitales]
- Williamsonia, Carruthers 1870 [Bennettitales]
- Williamsonia bryonyae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Williamsonia carruthersii, Seward [unclassified species]
- Williamsonia cynthiae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Williamsonia margotiana, J. Watson and C. A. Sincock 1992 [unclassified species]
- Williamsoniella, Thomas 1915 [Bennettitales]
- Williamsoniella coronata, Thomas 1915 [Bennettitales]
- Zamites carruthersii, Seward [unclassified species]
- Zamites corderi, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites dowellii, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites manoniae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites nicolae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites notokenensis, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites tatianae, J. Watson and C. A. Sincock 1992 [unclassified species]
- Zamites wendyellisae, J. Watson and C. A. Sincock 1992 [unclassified species]