Square retroprism

The square retroprism, also called the square crossed antiprism, is a prismatic isogonal polyhedron. It consists of 2 base squares and 8 isosceles triangles. Each vertex joins one square and three triangles. It is a crossed antiprism based on a square, seen as a 4/3-gon rather than 4/1. It cannot be made uniform.

It is isomorphic to the square antiprism.

Related polyhedra
There are an infinite amount of prismatic isogonal compounds that are the crossed antiprisms of compounds of squares.