Codonopsis Kofoid & Campbell, 1939 (original description)
Epicancella Kofoid & Campbell, 1939 accepted as Epicancella Kofoid & Campbell, 1929 (original description)
Epiorella Kofoid & Campbell, 1939 (original description)
Epirhabdonella Kofoid & Campbell, 1929 (original description)
Eurhabdonella Kofoid & Campbell, 1939 (original description)
Eutintinnus Kofoid & Campbell, 1939 (original description)
Euxystonellopsis Kofoid & Campbell, 1939 (original description)
Macroxystonellopsis Kofoid & Campbell, 1939 (original description)
Odontotintinnus Kofoid & Campbell, 1939 (original description)
Paraxystonellopsis Kofoid & Campbell, 1939 (original description)
Parundellopsis Kofoid & Campbell, 1939 (original description)
Proamphorella Kofoid & Campbell, 1939 (original description)
Proclimacocylis Kofoid & Campbell, 1939 (original description)
Prostelidiella Kofoid & Campbell, 1939 (original description)
Protorhabdonella Kofoid & Campbell, 1939 (original description)
Protoxystonellopsis Kofoid & Campbell, 1939 (original description)
Proxystonella Kofoid & Campbell, 1939 (original description)
Rhabdosella Kofoid & Campbell, 1939 accepted as Rhabdosella Kofoid & Campbell, 1929 (original description)
Spiroxystonella Kofoid & Campbell, 1939 (original description)
Xystonella Kofoid & Campbell, 1939 (original description)
Xystonelloides Kofoid & Campbell, 1939 (original description)
Xystonellopsis Kofoid & Campbell, 1939 (original description)