| Name | Amphithrix Bornet & Flahault |
| Authorship | Bornet & Flahault |
| Rank | Genus |
| NomenclaturalStatus | NomRej |
| Placed in | Rivulariaceae |
| Contains | Amphithrix incrustata Kützing |
| Remarks | nom. rej. vs. Homoeothrix (Thuret ex Bornet & Flahault) Kirchner 1898 (nom. cons.). Lectotype: A. janthina Bornet & Flahault (vide L. Geitler in A. Engler & Prantl, Nat. Pflanzenfam., ed. 2. 1b: 175. 1942) |
| Citation | 1886 Ann. Sci. Nat., Bot. ser. 7, 3: 340, 343 |