Vertebrata Cuvier, 1812 - vertebrates
Gnathostomata
Teleostomi
Tetrapoda Goodrich, 1930
Amniota Haeckel, 1866 - amniotes
Class Mammalia Linnaeus, 1758 - mammals
Subclass Theria Parker & Haswell, 1897
Theria of Metatherian-Eutherian grade
Infraclass Eutheria Gill, 1872
Order †Pyrotheria Ameghino, 1895
1 Family †Pyrotheriidae Ameghino, 1889
2 Family †Colombitheriidae Hoffstetter, 1970
see Family Pyrotheriidae Ameghino, 1889