Digonal disphenoid

The digonal disphenoid or didow is a type of tetrahedron with two pairs of two identical isosceles triangles for faces. It can be considered to be the digonal version of an antipodium.

In vertex figures
A total of 6 uniform polychora have digonal disphenoids for vertex figures, including the tesseractihexadecachoron, hexacosihecatonicosachoron, small hecatonicosihecatonicosachoron, dishecatonicosachoron, great hexacosihecatonicosachoron, and great hecatonicosihecatonicosachoron. They are also the vertex figures of any duoprism with non-identical base polygons.