Acanthocrania Williams, 1943 † (additional source)
Acanthocrania alta Cooper & Grant, 1974 † (original description)
Acanthocrania conferta Cooper & Grant, 1974 † (original description)
Acanthocrania densispina Cooper & Grant, 1974 † (original description)
Acanthocrania intermedia Cooper & Grant, 1974 † (original description)
Acanthocrania magna Cooper & Grant, 1974 † (original description)
Acanthocrania minutispinosa Cooper & Grant, 1974 † (original description)
Acanthocrania platys Cooper & Grant, 1974 † (original description)
Acanthocrania regularis Cooper & Grant, 1974 † (original description)
Acanthocrania vasta Cooper & Grant, 1974 † (original description)
Collemataria Cooper & Grant, 1974 † (original description)
Collemataria batilliformis Cooper & Grant, 1974 † (original description)
Collemataria elongata Cooper & Grant, 1974 † (original description)
Collemataria gregaria Cooper & Grant, 1974 † (original description)
Collemataria irregularis Cooper & Grant, 1974 † (original description)
Collemataria platys Cooper & Grant, 1974 † (original description)
Collemataria spatulata Cooper & Grant, 1974 † (original description)
Derbyoides Dunbar & Condra, 1932 † (additional source)
Derbyoides dunbari Cooper & Grant, 1974 † (original description)
Derbyoides marathonensis Cooper & Grant, 1974 † (original description)
Derbyoides nebrascensis Dunbar & Condra, 1932 † (basis of record)
Diplanus Stehli, 1954 † (additional source)
Diplanus apochordus Cooper & Grant, 1974 † (original description)
Diplanus catatonus Cooper & Grant, 1974 † (original description)
Diplanus lamellatus (King, 1931) † (basis of record)
Diplanus rarus Cooper & Grant, 1974 † (original description)
Diplanus redactus Cooper & Grant, 1974 † (original description)
Goniarina Cooper & Grant, 1969 † (additional source)
Goniarina appeli Cooper & Grant, 1974 † (original description)
Goniarina diabloensis Cooper & Grant, 1974 † (original description)
Goniarina futilis Cooper & Grant, 1974 † (original description)
Goniarina magniextensa Cooper & Grant, 1974 † (original description)
Goniarina permiana (Stehli, 1954) † (new combination reference)
Goniarina pyelodes Cooper & Grant, 1969 † (additional source)
Goniarina striata Cooper & Grant, 1974 † (original description)
Hypopsia Cooper & Grant, 1974 † (original description)
Hypopsia versuta Cooper & Grant, 1974 † (original description)
Hypopsiinae Cooper & Grant, 1974 † (original description)
Isogramma Meek & Worthen, 1870 † (basis of record)
Isogramma concavum Cooper & Grant, 1974 † (original description)
Isogramma diabloense Cooper & Grant, 1974 † (original description)
Isogramma lobatum Cooper & Grant, 1974 † (original description)
Isogramma vidriense Cooper & Grant, 1974 † (original description)
Isogrammidae Schuchert & Levene, 1929 † (additional source)
Lepidocrania Cooper & Grant, 1974 † (original description)
Lepidocrania sparsispinosa Cooper & Grant, 1974 † (original description)
Lepidocrania sublamellosa Cooper & Grant, 1974 † (original description)
Lepidocrania tardispinosa Cooper & Grant, 1974 † (original description)
Orthotetella King, 1931 † (additional source)
Orthotetella wolfcampensis King, 1931 † (basis of record)
Orthotetellidae Cooper & Grant, 1974 † (original description)
Petrocrania diabloensis Cooper & Grant, 1974 † (original description)
Petrocrania exasperata Cooper & Grant, 1974 † (original description)
Petrocrania septifera Cooper & Grant, 1974 † (original description)
Petrocrania teretis Cooper & Grant, 1974 † (original description)
Pulsiidae Cooper & Grant, 1974 † (original description)
Roemerella Hall & Clarke, 1892 † (basis of record)
Roemerella gigantissima Cooper & Grant, 1974 † (original description)
Schuchertella Girty, 1904 † (additional source)
Schuchertella lens (White, 1862) † (basis of record)
Schuchertella subvexa Cooper & Grant, 1974 † (original description)