Abstract
This report describes a new record and two unusual and rare species of marine algae collected from Oaxaca, Michoacan, Jalisco and Baja California Sur at Mexican Pacific coast. Boodleopsis verticillata is the first record in the Pacific shore of Mexico, in the case of Melobesia polystromatica, this is the sixth record at tropical Pacific while Litholepis sonorensisis reported for the third time in the Gulf of California. These results suggest that the taxonomic inventory of seaweed in the Pacific coast of Mexico is not yet complete, so attention must be given to the epiphytes, and other small and delicate species that inhabit the coast of Mexico. Morphological descriptions, distributional range, reproductive stage and samples examined are included.
Highlights
The Pacific coast of Mexico is considered one of the most diverse regions in species richness of seaweeds, to date there have been reported 1120 species of marine algae; in particular the western coast of the Peninsula de Baja California shows the greater number of species (742 taxa) [1]
We provide the first record of Boodleopsis verticillata E.Y
Comments: Litholepis sonorensis is only known from the type and Zihuatanejo, Guerrero, this is the third report in the Gulf of California
Summary
The Pacific coast of Mexico is considered one of the most diverse regions in species richness of seaweeds, to date there have been reported 1120 species of marine algae; in particular the western coast of the Peninsula de Baja California shows the greater number of species (742 taxa) [1]. In the case of Melobesia polystromatica and Litholepis sonorensis small fragments were decalcified with 0.6 M HNO3 and dehydrated with ethyl alcohol at different concentrations (10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and absolute ethyl alcohol) These fragments were embedded into paraffin blocks and subsequently sections of the specimens were made with a manual rotation Microtome American Optical®, these sections were fixed on slides with Ruyter’s adhesive [8], and stained with hematoxilin-eosine [5]. After this process the slides were observed using an Olympus microscope (CX31, Philippines) and observations of vegetative and reproductive structures were performed in order to determination both species. Appropriate comments about the morphology, specimens examined and distribution are provided for each species
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