| Current rank | : | †Rhizodontida (Infraclass) Andrews & Westoll, 1970 | |
Ref: J.S. Nelson et al., 2016: 110; 1 Apr 2025. [inferred] |
| Current rank | : | †Rhizodontida (Infraclass) Andrews & Westoll, 1970 | |
Ref: R. van der Laan, 2018: 90; 25 Feb 2025. [inferred] |
| Former rank | : | †Rhizodontida (Infraclass) Andrews & Westoll, 1970 | |
Ref: R. Cloutier & P.E. Ahlberg, 1996: 468; 1 Apr 2025. [inferred] |
| Former termination | : | †Rhizodontimorpha ([unranked]) | |
Ref: J.S. Nelson et al., 2016: 110. [implicit] |
| Current termination | : | †Rhizodontimorpha ([unranked]) | |
Ref: J.S. Nelson, 2006: 465. |