Small prismated octaexon

The small prismated octaexon or runcinated octaexon, also called the runcinated 7-simplex, is a convex uniform polyexon. It consists of 8 small prismated heptapeta, 8 birectified heptapeta, 28 rectified hexateric prisms, and 56 triangular-pentachoric duoprisms. 4 small prismated heptapeta, 1 birectified heptapeta, 3 rectified hexateric prisms, and 3 triangular-pentachoric duoprisms join at each vertex. As the name suggests, it is the runcination of the octaexon.