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A duotruncatotegum is an isotopic polytope constructed as the dual of a duotruncatoprism. The simplest possible duotruncatotegum is the digonal-square tegmantitegmoid, which can be thought of as the digonal duotruncatotegum, while the simplest unique duotruncatotegum is the triangular duotruncatotegum.

in 4D, an n-gonal duotruncatotegum has 4n2 cells. Each cell is a mirror-symmetric variant of the edge-truncated tetrahedron with 2 mirror-symmetric pentagons, 2 kites, and 2 scalene triangles as faces. If n is equal to 2, then the cell becomes a mirror-symmetric wedge, with 1 isosceles trapezoid, 2 kites, and 2 isosceles triangles as faces.