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This non-convex biform regular-faced polyhedron can also be thought of as being derived from a degenerate 4D segmentotope with zero height.

Note that it not truely would be a decomposition, because quite generally, the "lacing" facets of a non-convex "inner base" always are forced to overlap accordingly.

Both bases do not use the pentagonal faces each, thence this degenerate segmentotope moreover is a reduced one. The lacing faces here are just the regular-faced elements of xo5/2of&#x and of xo3/2ov&#x. Note that these occur as substructures of sidtid and gike respectly.

Incidence matrix

reduced( did || id by {5} )

30  * |  4   4  0 |  2  4  2  0  inner (did-)vertices
 * 30 |  0   4  4 |  0  2  4  2  outer (id-)vertices
------+-----------+------------
 2  0 | 60   *  * |  1  1  0  0
 1  1 |  * 120  * |  0  1  1  0
 0  2 |  *   * 60 |  0  0  1  1
------+-----------+------------
 5  0 |  5   0  0 | 12  *  *  *  green {5/2}
 2  1 |  1   2  0 |  * 60  *  *  yellow
 1  2 |  0   2  1 |  *  * 60  *  red
 0  3 |  0   0  3 |  *  *  * 20  blue