The taxonomy of Cruoriopsis and some other genera now in the family Peyssonneliales, including Cruoriella and Cruoria, have been the subject of much discussion over decades.

[5] Despite the fact that Cruoriopsis is an unnaccepted name taxonomically, four species remain within Cruoriopsis incertae sedis: C. danica, C. ensisae, C. hauckii, and C.

[6][7] The holotype species of this genus was originally described and named Cruoriopsis crucialis in 1865.

[8] However, this is no longer the accepted name and it was reclassified as Peyssonnelia armorica in 1916.

[9] Another species in a different genus, Cruoriella armorica, that was described in 1869 is now also considered synonymous with P.