Mammaliaformes Rowe 1988 Count: [g†g] 1c;24o;125f;1081g; ‡1o;6f;43g; †24o;301f;4057g;1s [crown] Class Mammalia Linnaeus, 1758 - mammals Count: [g†g] 24o;125f;1081g; ‡1o;6f;43g; †21o;294f;4034g;1s 1 Subclass Prototheria Gill, 1872 - monotremes Count: [g†g] 2o;2f;3g; †3g 2 Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988 Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †21o;294f;4031g;1s