( Cuthona behrensi one of five new sp...)Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

Cuthona behrensi, one of five new species of aeolid nudibranchs discovered in the Eastern Pacific. The Tropical Eastern Pacific, a discrete biogeographic region that has an extremely high rate of endemism among its marine organisms, continues to yield a wealth of never-before-described marine animals to visiting scientists at the Smithsonian Tropical Research Institute in Panama. Alicia Hermosillo, researcher at the Universidad de Guadalajara in Mexico, and Angel Valdes, assistant curator of Malacology at the Natural History Museum of Los Angeles County, describe five newly discovered species of nudibranchs, two of which Hermosillo collected in Panama, in Volume 22 of the American Malacological Bulletin.

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Nudibranchs—a group of mollusks lacking outer shells—have developed sophisticated chemical defense mechanisms, which is particularly important because promising industrial and medicinal products have been isolated from known species. New species may provide cures for diseases that are currently untreatable.

Working from the Smithsonian Tropical Research Institute’s Research Vessel, the Urraca, in Panama’s Gulf of Chiriqui and from the M/V Destiny in Mexico, Hermosillo and other scientists collected sea slugs, aeolid nudibranchs in scientific parlance, between 2001 and 2005. Funding for the research was provided by private donors Roberto Chavez, Steve Drogin and Buceo Vallartech, a dive shop in Puerto Vallarta. And by STRI staff scientist D. Ross Robertson.

It took Hermosillo and her collaborators two more years to identify the animals in the new collection by comparing them to existing collections, consulting specialists and using a scanning electron microscope to examine the jaws and other hard parts of the nudibranchs that distinguish species.

This was part of the formal project “Phylogenetic Systematics of Nudibranchia,” sponsored by a National
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Source:Smithsonian Tropical Research Institute