A family picture about half-truncated-cubes without THE half-truncated cube?
http://twistypuzzles.com/cgi-bin/puzzle.cgi?pkey=862Hereby I declare you collection as incomplete!
I see you are running out of categories, aren't you?
Octahedrons can be viewed as triangular antiprisms but how could a rhombohedron (aka trigonal trapezohedron) fit into this definition?
Andreas