The polyphyletic nature and unclear evolutionary relationships of the genus Bacillus has long been a topic in the scientific community.

[8][9][10][1] The name Heyndrickxia was chosen to celebrate Professor Marc Heyndrickx (University of Gent) for his contributions to the field of microbiology and his research on Bacillus species.

[11] Additionally, the non-validly published species "Bacillus obstructivis" also branches with members of Heyndrickxia as well as share the unique molecular markers specific for the genus.

[1] However, transfer of this species into the clade was not proposed due to the lack of culture strain information.

This indicates the need to perform periodic analysis of the classification of this genus when more genome sequence and culture stain information becomes available.