Pentagonal duotegum

The pentagonal duotegum, also known as the pentagonal-pentagonal duotegum, the 5 duotegum, or the 5-5 duotegum, is a noble duotegum that consists of 25 tetragonal disphenoids and 10 vertices. It is also the 10-4 step prism and the square funk tegum. Together with its dual, it is the first in an infinite family of pentagonal dihedral swirlchora.