With respect to B. praemorsa, however, Mast's results accord closely with the arrangement of Thiele and Ladiges, placing it in a polytomous clade corresponding exactly with Thiele and Ladiges' B. ser. Cyrtostylis.
The study by Mast supports the previous work of Thiele and Ladiges in classifying B. praemorsa as part of the same clade as B. ser. Cyrtostylis, which is a polytomous grouping.