Square disphenoid

The square disphenoid, squadow, or digonal duoantifastegium is a convex noble polyteron with 8 square scalenes as facets. 6 facets join at each vertex. However, it cannot be made scaliform, because the height between the two squares is 0 if all edges are of the same length, making it a hexadecachoron instead. Along with the digonal tetrahedroorthowedge, it is one of the two known isogonal polytera with 8 vertices.