- Ameghinocythere lutheri Dingle, 2009 †
- Ameghinocythere reticulata Whatley, Moguilevsky, Toy, Chadwick & Ramos, 1997
- Arcacythere eocenica (Whatley, Uffenorde, Harlow, Downing & Kesler, 1982) Ayress, 1991 †
- Keijia patagonica Whatley, Moguilevsky, Toy, Chadwick & Ramos, 1997
- Munseyella bissetae Dingle, 2003
- Pectocythere magellanensis Whatley, Staunton, Kaesler & Moguilevsky, 1996