Prismatic transitional biomnisnub decachoron

The prismatic transitional biomnisnub decachoron or petbosid is a convex isogonal polychoron that consists of 10 snub tetrahedra, 20 gyrated rectified triangular prisms, 20 triangular gyroprisms, 60 phyllic disphenoids, and 120 irregular tetrahedra. 1 snub tetrahedron, 2 gyrated rectified triangular prisms, 1 triangular gyroprism, 2 phyllic disphenoids, and 4 irregular tetrahedra join at each vertex. It is one of a total of 8 polychora that can be obtained as the convex hull of 2 opposite snub pentachora.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\frac{\sqrt{176+36\sqrt6+3\sqrt{978+358\sqrt6}}}{10}$$ ≈ 1:1.98430.