Well, technically an igloo is a lesser-circle dome while these are greater-circle domes; but, yeah, only igloos and geodesic radar domes are viable in that extreme environment. Other examples of lesser circle domes are the Pantheon or the
CERN dome.
I can't tell from the renderings, but generally these are made by squashing the ends of the tubes and stacking them on a bolt. My design has the fasteners tangent to the surface and only connecting 2 tubes at a time. One 20lb piece of steel I-beam and I'm ready for the next round of tests.