The genus Doritis had only one species, Doritis pulcherrima, with several varieties. It was easy knowing that any orchid named Doritaenopsis had D. pulcherrima in it's lineage. A very typical characteristic is the smaller sized flowers (compared to the well-known larger sized flowers of many phalaenopsis hybrids) it would produce a good majority of the time.
Doritis has been reclassified as Phalaenopsis.
Check out this past thread as this subject has been addressed before -
Taxonomy question?