Mollusc diversity associated with the non-indigenous macroalga Asparagopsis armata Harvey, 1855 along the Atlantic coast of the Iberian Peninsula.

The aims of this study were to explore mollusc assemblages associated with the non-indigenous macroalga Asparagopsis armata, to compare them with those on other macroalgae at the study region and to explore potential differences on mollusc assemblages between two regions in the Atlantic coast of the Iberian Peninsula, where A. armata is present. To achieve this, at each region, four intertidal shores were sampled. Twenty-nine mollusc species were reported and thus, A. armata harboured similar or higher diversity than other annual macroalgae in this area. When compared with perennial macroalgae, results depend on the species and studied area. Moreover, significant differences in structure of mollusc assemblages between the two studied regions were found. However, these were due to differences in the relative abundance of species rather than the presence of exclusive species at each region.

Checklist of the Free-Living Marine Nematodes of the Iberian Peninsula (north east Atlantic).

A Checklist of the Free-Living Marine Nematodes of the Iberian Peninsula, based on the literature published to date, is presented in this paper. The localities where the taxa were collected, as well as the habitats and depths where they were found, are also mentioned. All references to date provide a total of 236 species, 142 genera and 37 unidentified families. Also, the preparation of the present Checklist allowed us to clarify some errors that have been dragging on for some time and make a few clarifications, all of them based on a review of the original papers.