Inverted quasiprismatodishexadecachoron

The inverted quasiprismatodishexadecachoron, or iquipadah, is a nonconvex uniform polychoron that consists of 16 regular tetrahedra, 32 triangular prisms, 16 cubes, and 8 octagonal prisms. 1 tetrahedron, 3 triangular prisms, 2 cubes, and 2 octagonal prisms meet at each vertex.

It can be created by blending a small disprismatotesseractihexadecachoron with an octagonal diorthoprism, an inscribed compound of 2 square-octagonal duoprisms. In the process 16 cubical cells blend out.

Its vertex figure is concave, a property shared by sanbathi.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small disprismatotesseractihexadecachoron.