Square-pentagonal tetraswirltegum

The square-pentagonal tetraswirltegum is a convex isochoric polychoron and member of the duoprismatic swirltegum family with 80 identical cells.

Each cell of this polychoron has bilateral symmetry, with 2 mirror-symmetric octagons, 6 kites, and 4 isosceles triangles for faces.