Biological and chemical characterizations of three new species of Dysidea (Porifera : Demospongiae) from the Pacific Mexican coast

Abstract

The integration of biological and chemical data has provided patterns to identify three new Dysidea species from the Gulf of California (Pacific Ocean, Mexico). These three species are differentiated by distinctive morphological characters, such as the prominent subdermal fibers running along the surface in Dysidea reformensis n. sp., the granular appearance of the surface in conjunction with the consistent habit in Dysidea cachui n. sp., and the skeletal details such as tertiary network between the secondary fibers in Dysidea uriae n. sp. Differences are also observed in the natural products content of these species. Sesquiterpene-hydroquinone derivatives are the main secondary metabolites of D. reformensis and D. cachui, with each species displaying a different chemical profile, while the furanosesquiterpene dendrolasin has been isolated from D. uriae. The distinctive morphological characters and the natural products contained by each species are also compared with those of related Dysidea species. (c) 2006 Elsevier Ltd. All rights reserved.