Apeirogonal antiprism pseudoprismatic honeycomb

The apeirogonal antiprism pseudoprismatic honeycomb is a uniform Euclidean honeycomb. It consists of 2 square tilings and ∞ triangular prisms. Each vertex joins 1 square tiling and 6 triangular prisms.

This honeycomb was formerly known as square tiling hemiantiprism, from which the acronym "squathap" was derived.

It can be constructed from the comb product of the apeirogon and the apeirogonal antiprism by blending adjacent apeirogonal prisms into square tilings.

It can also be constructed as comb(x∞o, x∞o) || comb(x∞o, o∞x), using Klitzing's atop notation.