New data on the distribution of Torodinium robustum and T. teredo (Dinophyceae: Gymnodiniales) in the Gulf of California

The gymnodinioid marine dinoflagellates Torodinium robustum and T. teredo are reported for the Gulf of California. This is the first record of Torodinium teredo on the Pacific coast of Mexico. Both species were found mainly during the winter-spring in seawater at 19–27.5 °C. Torodinium robustum was the most frequent species. Morphological features of T. robustum and T. teredo varied widely and specimens observed in live samples and fixed in Lugol's solution were easily recognizable. Short description and microphotographs were provided for each species.