| Name | Udotea flabellata J. V. Lamouroux |
| Authorship | J. V. Lamouroux |
| Rank | Species |
| Placed in | Udotea J. V. Lamouroux |
| Remarks | nom. illeg. This name is currently regarded as a taxonomic synonym of Udotea flabellum (J.Ellis & Solander) M.A.Howe |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Udotea flabellata J. V. Lamouroux |
| Identification made in | [no date] (2) |