Eoastartinae Newell & Boyd, 1975 † (original description)
Eoschizodidae Newell & Boyd, 1975 † (original description)
Eoschizodus truncatus (Goldfuss, 1837) † (basis of record)
Heteroschizodus Newell & Boyd, 1975 † (original description)
Heteroschizodus macomoides Newell & Boyd, 1975 † (original description)
Kaibabella basilica Newell & Boyd, 1975 † (original description)
Lyroschizodus Newell & Boyd, 1975 † (original description)
Lyroschizodus oklahomensis (Beede, 1907) † (basis of record)
Lyroschizodus orbicularis Newell & Boyd, 1975 † (original description)
Neoschizodus thaynesianus Newell & Boyd, 1975 † (original description)
Paraschizodus Newell & Boyd, 1975 † (original description)
Paraschizodus elongatus Newell & Boyd, 1975 † (original description)
Paraschizodus rothi Newell & Boyd, 1975 † (original description)
Procostatoria Newell & Boyd, 1975 † (original description)
Procostatoria cooperi Newell & Boyd, 1975 † (original description)
Procostatoria gloveri Newell & Boyd, 1975 † (original description)
Scaphellina concinna (C. C. Branson, 1930) † (basis of record)
Schizodidae Newell & Boyd, 1975 † (original description)
Schizodus (Toechomya) J. M. Clarke, 1899 † (basis of record)
Schizodus alpinus (J. Hall, 1858) † (basis of record)
Schizodus altus Newell & Boyd, 1975 † (original description)
Schizodus amplus Meek & Worthen, 1870 † (basis of record)
Schizodus canalis C. C. Branson, 1930 † (basis of record)
Schizodus compressus Beede, 1900 † (basis of record)
Schizodus concinnus C. C. Branson, 1930 † accepted as Scaphellina concinna (C. C. Branson, 1930) † (basis of record)
Schizodus meekanus Girty, 1899 † (basis of record)
Schizodus mooresi S. A. Miller, 1889 † accepted as Schizodus amplus Meek & Worthen, 1870 † (basis of record)
Schizodus oklahomaensis Beede, 1907 † accepted as Lyroschizodus oklahomensis (Beede, 1907) † (basis of record)
Schizodus phosphoriensis C. C. Branson, 1930 † accepted as Scaphellina concinna (C. C. Branson, 1930) † (basis of record)
Schizodus symmetricus Calvin, 1890 † accepted as Schizodus alpinus (J. Hall, 1858) † (source of synonymy)
Schizodus trigonalis Sayre, 1930 † (basis of record)
Schizodus ulrichi Worthen, 1890 † (basis of record)
Schizodus wyomingensis Newell & Boyd, 1975 † (original description)