Resumen del producto

¹ Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas

The genus Coolia A. Meunier 1919 has a global distribution and is a common member of epiphytic dinoflagellate assemblagesin neritic ecosystems. Coolia monotis is the type species of the genus and was the only known species for 76years. Over the past few decades, molecular characterization has unveiled two species complexes that group morphologicallyvery similar species, so their limits are often unclear. To provide new knowledge on the biogeography and speciescomposition of the genus Coolia, 16 strains were isolated from Bahía de La Paz, Gulf of California. The species wereidentified by applying morphological and molecular approaches. The morphometric characteristics of all isolated Cooliaspecies were consistent with the original taxa descriptions. Phylogenetic analyses (large subunit rDNA D1 / D2 andinternal transcribed spacer 1 / 5.8S / ITS2) revealed a species assemblage comprising Coolia malayensis, C. palmyrensis,C. tropicalis, and the C. cf. canariensis lineage. This is the first report of Coolia palmyrensis and C. cf. canariensisin Mexico and C. tropicalis in the Gulf of California. Our results strengthen the biogeographical understanding of thesepotentially harmful epiphytic dinoflagellate species.

Palabras clave: Bahía de La Paz; Gulf of California; Coolia species; epiphytic dinoflagellates; ITS1 / 5.8S / ITS2; LSU rDNA; Morphology; taxonomy

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