New Mexican records of marine algae including crouania mayae sp. nov. (Ceramiaceae, Rhodophyta)

We report new records from the Mexican Caribbean of three species of Rhodophyta (including Crouania mayae sp. nov.), two species of Heterokontophyta, and two species of Chlorophyta; all are rare species in the Caribbean. The only previous Caribbean record of Rhodochaete pulchella is from Jamaica, and Naccaria antillana was known only from Jamaica and Nevis Island. Herponema tortugense has been reported from Florida, Puerto Rico and Brazil. The record of Verosphacella ebrachia is the first outside the type locality in Florida and that of Rhipidosiphon floridensis is the first outside of Florida and Puerto Rico. Rhipiliopsis stri is reported for the first time outside of Panama, Colombia and the Netherlands Antilles. Information is given on the morphology, reproductive stage, localities and habitats of these taxa.