A locally regular heptagon–dodecahedron embedded in 3-space

We construct a polyhedral 2-manifold of genus 2 embedded in Euclidean 3-space, and hence oriented, built up of 12 planar (but nonconvex) heptagons, three meeting at each vertex, i.e., locally regular or equivelar. The polyhedron is face-minimal among all equivelar polyhedra of genus g≥2.It has a threefold symmetry axis and exists in two chiral versions.