Alaskacirrus Frýda & Blodgett, 1998 † (original description)
Alaskiella Frýda & Blodgett, 1998 † (original description)
Anactolasma Pedder, 1998 † (original description)
Angelosquilla Hof & Schram, 1998 † (original description)
Asarcophyllum Pedder, 1998 † (original description)
Aspiduriella Bolette, 1998 † (original description)
Ceriostella Roniewicz & Stanley, 1998 † (original description)
Chesapeakiceras Kennedy & Cobban, 1998 † (original description)
Inconobotopora Tang & Cuffey, 1998 † (original description)
Lasarchopyge Chatterton, Edgecombe, Waisfeld & Vaccari, 1998 † (original description)
Murphyphyllum Pedder, 1998 † (original description)
Paratoernquistia Chatterton, Edgecombe, Waisfeld & Vaccari, 1998 † (original description)
Topangasquilla Hof & Schram, 1998 † (original description)