Small dispinosnub prismatosnub pentishexacosichoron

The small dispinosnub prismatosnub pentishexacosichoron, or sednasapspox, is a nonconvex uniform polychoron that consists of 600 small stellated dodecahedra, 600 great dodecahedra, 4800 cubohemioctahedra (some of which lie in the same hyperplanes, forming 2400 compounds of two), 600 truncated icosahedra, 600 small rhombidodecahedra, 600 small dodecicosahedra, and 3600 pentagrammic prisms.

One small stellated dodecahedron, one great dodecahedron, eight cubohemioctahedra (eight compounds), five truncated icosahedra, five small rhombidodecahedra, five small dodecicosahedra, and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small spinobased dipentary hexacositrishecatonicosachora and 5 small dipentary hecatonicosiprismatohecatonicosihexacosichora. In the process, some of the cubohemioctahedron cells blend out.

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