Small biprismatotriacontadiadispenteract

The small biprismatotriacontadiadispenteract, or sibtadin, is a nonconvex uniform polyteron. It consists of 80 triangular-square duoprisms, 32 decachora, 10 great rhombated tesseracts, and 10 small cubihexadecadisoctachora. 2 small cubihexadecadisoctachora, 1 decachoron, 1 triangular-square duoprism, and 2 great rhombated tesseracts join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the prismatorhombated penteract.