Euphemites Warthin, 1930 † (additional source)
Euphemites aequisulcatus Chronic, 1952 † (basis of record)
Euphemites batteni Yochelson, 1960 † (original description)
Euphemites crenulatus Yochelson, 1960 † (original description)
Euphemites exquisitus Yochelson, 1960 † (original description)
Euphemites imperator Yochelson, 1960 † (original description)
Euphemites kingi Yochelson, 1960 † (original description)
Euphemites luxuriosus Yochelson, 1960 † (original description)
Euphemites sparcilliratus Yochelson, 1960 † (original description)
Euphemitopsis Yochelson, 1960 † (original description)
Euphemitopsis circumcostatus (Walter, 1953) † (taxonomy source)
Euphemitopsis multinodosa Yochelson, 1960 † (original description)
Euphemitopsis paucinodosa Yochelson, 1960 † (original description)
Knightites R. C. Moore, 1941 † (basis of record)
Knightitinae Knight, 1956 † (basis of record)
Lepetopsis Whitfield, 1882 † (additional source)
Lepetopsis capitanensis (Girty, 1909) † (basis of record)
Patellilabia Knight, 1945 † (basis of record)
Sinuitidae Dall, 1913 † (additional source)
Sinuitina Knight, 1945 † (basis of record)
Sinuitina keytei Yochelson, 1960 † (original description)
Sphaerocyclus Perner, 1903 † (additional source)
Warthia americana Girty, 1908 † (basis of record)
Warthia angustior Yochelson, 1960 † (original description)
Warthia crassus Yochelson, 1960 † (original description)
Warthia fissus Yochelson, 1960 † (original description)
Warthia saundersi Yochelson, 1960 † (original description)
Warthia waageni Yochelson, 1960 † (original description)
Warthia welleri Yochelson, 1960 † (original description)