Metacarpophalangeal joint is
Ellipsoid(functionally) / condylar joints(structurally): 1. Wrist (radio-carpal joints) 2. Knuckle (metacarpophalangeal joint) 3. Atlanto - occipital joint Ellipsoid > condylar joints
Condylar
Ellipsoid
Saddle
Hinge
Osteology