Small prismatohexadecadisoctachoron

The small prismatohexadecadisoctachoron, or siphado, is a nonconvex uniform polychoron that consists of 32 triangular prisms, 16 octahemioctahedra, 8 truncated cubes, and 8 great rhombicuboctahedra. 1 triangular prism, 1 truncated cube, 1 octahemioctahedron, and 2 great rhombicuboctahedra join at each vertex.

It is inn the same regiment as the prismatorhombated hexadecachoron.