Square-pentagonal tetraswirlprism

The square-pentagonal tetraswirlprism is a convex isogonal polychoron and member of the duoprismatic swirlprism family that consists of 16 pentagonal antiprisms, 20 square antiprisms, and 240 phyllic disphenoids of three kinds. 2 pentagonal antiprisms, 2 square antiprisms, and 12 phyllic disphenoids join at each vertex. It can be obtained as a subsymmetrical faceting of the hexadecagonal-icosagonal duoprism.