| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Opalia barbadensis | De Boury, 1913 | synonym | No | junior synonym |
original combination |
| Opalia dunkeri | de Boury, 1889 | synonym | No | junior synonym |
original combination |
| Opalia linteatum | Schwengel, 1943 | synonym | No | junior synonym |
original combination |
| Opalia nodosocarinata | (Dall, 1889) | synonym | No | junior synonym |
new combination |
| Opalia pumilio | (Morch, 1874) | accepted name | Yes | senior synonym |
new combination |
| Opalia semivaricosa | de Boury, 1889 | synonym | No | junior synonym |
original combination |
| Opalia subvaricosa | Morch, 1874 | synonym | No | junior synonym |
original combination |
| Scala pumilio | Mörch, 1875 | synonym | No | senior synonym |
original combination |