Swirlprismatodiminished biambotetracontoctachoron

The swirlprismatodiminished biambotetracontoctachoron or spidbamic is an isogonal polychoron that consists of 48 triangular antiprisms, 96 triangular frustums, and 144 tetragonal antiwedges. 2 triangular antiprisms, 4 triangular frustums, and 6 tetragonal antiwedges join at each vertex.

It can be constructed by removing the vertices of an inscribed bitetracontoctachoron from a biambotetracontoctachoron, in a similar way to how a swirlprismatodiminished rectified icositetrachoron is derived from a rectified icositetrachoron. In fact, it can also be seen as the convex hull of 2 swirlprismatodiminished rectified icositetrachora.

The ratio between the longest and shortest edges is 1:$$1+\sqrt2$$ ≈ 1:2.41421.

Isogonal derivatives
Substitution by vertices of these following elements will produce these convex isogonal polychora:
 * Triangular antiprism (48): Bitetracontoctachoron
 * Triangle (48): Bitetracontoctachoron