Acronym	tehtrah (old: datha)
Name	tetrahemitriangular honeycomb, ditetratihemiapeiratic honeycomb
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Incidence matrix according to Dynkin symbol

o3x3o3o3/2*a3*c   (N,M → ∞)

. . . .         | NM ♦  12 |  12  12 |  4  4  4
----------------+----+-----+---------+---------
. x . .         |  2 | 6NM |   2   2 |  2  1  1
----------------+----+-----+---------+---------
o3x . .         |  3 |   3 | 4NM   * |  1  1  0
. x3o .         |  3 |   3 |   * 4NM |  1  0  1
----------------+----+-----+---------+---------
o3x3o .   *a3*c ♦  M |  3M |   M   M | 4N  *  *
o3x . o3/2*a    ♦  4 |   6 |   4   0 |  * NM  *
. x3o3o         ♦  4 |   6 |   0   4 |  *  * NM

o3/2x3/2o3o3/2*a3*c   (N,M → ∞)

.   .   . .         | NM ♦  12 |  12  12 |  4  4  4
--------------------+----+-----+---------+---------
.   x   . .         |  2 | 6NM |   2   2 |  2  1  1
--------------------+----+-----+---------+---------
o3/2x   . .         |  3 |   3 | 4NM   * |  1  1  0
.   x3/2o .         |  3 |   3 |   * 4NM |  1  0  1
--------------------+----+-----+---------+---------
o3/2x3/2o .   *a3*c ♦  M |  3M |   M   M | 4N  *  *
o3/2x   . o3/2*a    ♦  4 |   6 |   4   0 |  * NM  *
.   x3/2o3o         ♦  4 |   6 |   0   4 |  *  * NM