Square duotruncatoprism

The square duotruncatoprism or squidtep is a convex isogonal polychoron and the second member of the duotruncatoprism family. It consists of 8 ditetragonal prisms, 16 rectangular trapezoprisms, 32 wedges, and 16 tetragonal disphenoids. 2 ditetragonal prisms, 2 rectangular trapezoprisms, 3 wedges, and 1 tetragonal disphenoid join at each vertex. It can be obtained as the convex hull of two orthogonal semi-uniform square-octagonal duoprisms whose octagonal prism cells have a smaller circumradius than their square prisms. Although it cannot be made uniform while remaining convex, it is isomorphic to the inverted quasiprismatodishexadecachoron.