Pentagonal retroprism

The pentagonal retroprism, also called the pentagonal crossed antiprism, is a prismatic isogonal polyhedron. It consists of 2 base pentagons and 10 isosceles triangles. Each vertex joins one pentagon and three triangles. It is a crossed antiprism based on a pentagon, seen as a 5/4-gon rather than 5/1. It cannot be made uniform.

It is isomorphic to the pentagonal antiprism.

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