Truncated small prismatodecachoron

The truncated small prismatodecachoron or tispid is a convex isogonal polychoron that consists of 10 truncated tetrahedra, 20 truncated triangular prisms and 20 triangular antiprisms. 1 triangular antiprism,, 1 truncated tetrahedron, and 3 truncated triangular prisms join at each vertex. It can be formed by truncating the small prismatodecachoron.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\sqrt2$$ ≈ 1:1.41421.

It can also be formed as the convex hlul of two oppositely-oriented semi-uniform variants of the prismatorhombated pentachoron of the form a3b3o3c, where if a = 1, then c = b+2.