| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Aulacoseira agassizii | 591193 | (Ostenf.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira alpigena | 591204 | (Grunow) Krammer | | ITIS | accepted | | Species |
| Aulacoseira ambigua | 591194 | (Grunow) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira canadensis | 591195 | (Hust.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira distans | 591208 | (Ehrenb.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira distans var. alpigena | 591516 | (Grunow) Simonsen | | ITIS | not accepted | synonym of Aulacoseira alpigena | Variety |
| Aulacoseira granulata | 591207 | (Ehrenb.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira islandica | 591482 | (O. Müll.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira italica | 591483 | (Ehrenb.) Simonsen | | ITIS | accepted | | Species |
| Aulacoseira lirata | 591108 | (Ehrenberg) Ross | | ITIS | accepted | | Species |
| Aulacoseira subarctica | 591206 | (O. Müll.) E. Y. Haw. | | ITIS | accepted | | Species |
| Gallionella distans | 590944 | Ehrenb. | | ITIS | not accepted | synonym of Aulacoseira distans | Species |
| Lysigonium granulata | 590946 | (Ehrenb.) Kuntze | | ITIS | not accepted | synonym of Aulacoseira granulata | Species |
| Melosira agassizii | 590938 | Ostenf. | | ITIS | not accepted | synonym of Aulacoseira agassizii | Species |
| Melosira ambigua | 2325 | (Grunow) O. Müll. | | ITIS | not accepted | synonym of Aulacoseira ambigua | Species |
| Melosira canadensis | 590931 | Hust. | | ITIS | not accepted | synonym of Aulacoseira canadensis | Species |
| Melosira crotonensis | 590989 | (J. W. Bail.) H. L. Sm. | | ITIS | not accepted | synonym of Aulacoseira italica | Species |
| Melosira distans | 2320 | (Ehrenb.) Kütz. | | ITIS | not accepted | synonym of Aulacoseira distans | Species |
| Melosira distans var. alpigena | 2323 | Grunow | | ITIS | not accepted | synonym of Aulacoseira alpigena | Variety |
| Melosira distans var. distans | 2321 | (Ehrenb.) Kütz. | | ITIS | not accepted | synonym of Aulacoseira distans | Variety |
| Melosira granulata | 2297 | (Ehrenb.) Ralfs | | ITIS | not accepted | synonym of Aulacoseira granulata | Species |
| Melosira granulata var. granulata | 2298 | (Ehrenb.) Ralfs | | ITIS | not accepted | synonym of Aulacoseira granulata | Variety |
| Melosira islandica | 2304 | O. Müll. | | ITIS | not accepted | synonym of Aulacoseira islandica | Species |
| Melosira islandica var. islandica | 2306 | O. Müll. | | ITIS | not accepted | synonym of Aulacoseira islandica | Variety |
| Melosira italica ssp. subarctica | 2336 | O. Müll. | | ITIS | not accepted | synonym of Aulacoseira subarctica | Subspecies |
| Melosira italica var. italica | 2335 | (Ehrenb.) Kütz. | | ITIS | not accepted | synonym of Aulacoseira italica | Variety |
