Usually, Halymenia and Cryptonemia species have been reported as associated with rhodolith beds, but based on surveys of rhodolith beds and rocky areas along the Gulf of California (60 localities), in five localities we found the range extension (5 localities) of three other blade-like species, Kallymenia norrisii and K. oblongifructa previously reported on the North Pacific coast of California State (USA) and K. pertusa previously reported in the northern Gulf of California. The present study reports for the first time the presence of K. norrisii, K. oblongifructa and K. pertusa associated with rodolith beds. This suggests that the understanding of biodiversity of marine plants from the Gulf of California still needs attention, especially in deeper areas and habitats such as rhodolith beds.
