| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Megayoldia kamtchatkana | 999003152 | Scarlato, 1981 | | SBMNH | not public | mtsn | Species |
| Megayoldia martyria | 567872 | (Dall, 1897) | oblique yoldia | ITIS | valid | | Species |
| Megayoldia montereyensis | 567873 | (Dall, 1893) | Monterey yoldia | ITIS | valid | | Species |
| Megayoldia ochotensis | 999003153 | (Scarlato, 1981) | | SBMNH | not public | mtsn | Species |
| Megayoldia thraciaeformis | 567874 | (Storer, 1838) | broad yoldia | ITIS | valid | | Species |
| Yoldia montereyensis | 79272 | Dall, 1893 | | ITIS | invalid | original name/combination of Megayoldia montereyensis | Species |
| Yoldia thraciaeformis | 79269 | (Storer, 1838) | broad yoldia | ITIS | invalid | subsequent name/combination of Megayoldia thraciaeformis | Species |
