This is what Casio says about this species, he said it is part of the discussion about our other Hoffmannseggellla.
......The main difference between pfisteris and pabstiis is that pfisteris have very small flowers, rarely larger than 2cm diam. whereas pabstiis are more variable and generally larger (up to 3-4cm). There are some large-flowered pfisteris which were described as a "new species", Hoffmanseggella diamantinensis, however we investigated their genetics and discovered that they are pfisteris with 15% introgression of C. sincorana (believe me), which grows together in the same location.Â
Hoffmannseggella diamantinensis, Award number 20114252 , has been confirmed to be Cattleya luetzelburgii by SITF (April 2013), with assistance of Cássio van den Berg. Please add to description that is was awarded as  Hoffmannseggella diamantinensis, that way when more information comes it in it can be found again.