stratigraphic intervals
Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: [*†*] 2; †295
   (System) †Cretaceous (145.0 - 66.0 Ma)
  Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: [†*] †42
     (Series) †Upper (100.5 - 66.0 Ma)
    Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: [†*] †20
       (Subseries) †Gallic
      Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: [†*] †7
         (Stage) †Cenomanian (100.5 - 93.9 Ma)
        Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: [†*] †3
           (Substage) †middle
          Ref: J.J. Sepkoski Jr., 2002: table 1 (p. 7); Count: -