Parabiexcavated truncated cube

The parabiexcavated truncated cube is a quasi-convex Stewart toroid. It can be made by excavating 2 square cupolas and 1 cube from a truncated cube. Another polyhedron, the orthobiexcavated truncated cube, can also be made from excavating the same solids from the truncated cube, but with different symmetry. The orthobiexcavated truncated cube is constructed such that the excavated square copulas are mirrors of each other, while the parabiexcavated truncated cube is constructed with the a eighth-turn twist between the excavated cupolas.