Eulimid gastropods (Caenogastropoda: Eulimidae) of the Canary Islands. Part I. Species parasiting sea urchins

The present paper deals with 4 species of eulimid gastropods parasitic on sea urchins: Echineulima leucophaes parasite of Diadema antillarum; Vitreolina philippi parasite of Arbacia lixula, Paracentrotus lividus and Sphaerechinus granularis; and Nanobalcis nana and Sabinella bonifaceae both parasites of the sea urchin Cidaris cidaris. A complete description of shell and soft parts of these species along wiht data on lifestyle and infestation rates is provided