Abstract The genus Elysia comprises about one-third of the species richness in Sacoglossa. However, diversity remains poorly characterized some areas like north-eastern Atlantic and Mediterranean waters. To clarify systematics this to characterize undersampled regions, we performed an integrative study based on a thorough literature review, molecular morphological analyses, delimitation approac...

The genus Smeagol consists of five named species air-breathing marine slugs (restricted to southern Australia and New Zealand) three undescribed taxa from Japan. Only one species, S. hilaris, is known be South Wales (NSW), it previously had a distribution limited site, Merry Beach on the south coast. This diminutive invertebrate classified as critically endangered in NSW due its extremely restr...

Two new species of the genus Rissoella Gray, 1847 are described from Venezuela, one from the National Park Morrocoy, Rissoella morrocoyensissp. n. and the other from the Wildlife Refuge Isla de Aves, Rissoella venezolanicolasp. n.Rissoella morrocoyensissp. n. has a deep umbilicus (partly closed), preumbilical cord, black head, hypobranchial gland marked by a pale yellow boomerang-shaped ribbon ...