| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| ! Cribrononion frigidium | (Cushman, 1933) | synonym | No | senior synonym |
new combination |
| Cribrononion frigidum | (Cushman, 1933) | synonym | No | senior synonym |
new combination |
| Elphidium frigidum | Cushman, 1933 | accepted name | Yes | senior synonym |
original combination |