Digonal-pentagonal triswirlprism

The digonal-pentagonal triswirlprism is a convex isogonal polychoron and member of the duoprismatic swirlprism family that consists of 6 pentagonal gyroprisms, 15 rhombic disphenoids, and 60 phyllic disphenoids of two kinds. 2 pentagonal gyroprisms, 2 rhombic disphenoids, and 8 phyllic disphenoids join at each vertex. It can be obtained as a subsymmetrical faceting of the hexagonal-pentadecagonal duoprism.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\sqrt{\frac{20}{20+\sqrt5-\sqrt{150+30\sqrt5}}}$$ ≈ 1:1.63274.