| Current rank | : | †Thelodonti (Class) Jaekel, 1911 | |
Ref: J.S. Nelson, 2006: 31. [indirect] |
| Former rank | : | †Thelodonti (Superclass) Jaekel, 1911 | |
Ref: M.J. Benton, 2015: 434; 3 Apr 2025. [inferred] |
| Former rank | : | †Thelodonti (Class) Jaekel, 1911 | |
Ref: M.J. Benton, 2015: 434; 3 Apr 2025. [inferred] |
| Former rank | : | †Thelodonti (Subclass) Kiaer, 1932 | |
Ref: M.J. Benton, 2015: 434; [<3 Apr 2025]. [inferred] |
| Former termination | : | †Thelodontida (Order) | |
Ref: M.J. Benton, 2015: 434; [<3 Apr 2025]. [inferred] |
| Former termination | : | †Thelodontiformes (Order) Kiaer, 1932 | |
Ref: M.J. Benton, 2015: 434; [<3 Apr 2025]. [inferred] |