In synonymy:
Mexigonus albidus (F. O. Pickard-Cambridge, 1901, T from Sidusa) = Mexigonus minutus F. O. Pickard-Cambridge, 1901 (Richman & Cutler, 1978: 101, sub Tylogonus)
Mexigonus belli (Gertsch, 1935, T from Habrocestum) = Mexigonus arizonensis Banks, 1904 (Richman & Cutler, 1978: 101, sub Tylogonus)
Mexigonus claremonti (G. W. Peckham & E. G. Peckham, 1909, T from Sitticus) = Mexigonus morosus G. W. Peckham & E. G. Peckham, 1888 (Edwards, 1980: 12, sub Tylogonus)
Mexigonus inscriptum (Schenkel, 1951, T from Habrocestum) = Mexigonus morosus G. W. Peckham & E. G. Peckham, 1888 (Richman, 1981: 197, sub Tylogonus)