European marine Mollusca: notes on less well-known species. XI. Scacchia zorni spec. nov. (Bivalvia: Erycinidae) from the Atlantic coast of Portugal

In 1972 we obtained some shell-grit, collected by Mr. A. Zorn, in Lagos, Portugal. Apart from many other interesting species, this material provided quite a number of specimens of an unknown bivalve species, apparently belonging to the Erycinidae Deshayes, 1850, and most probably attributable to the genus Scacchia Philippi, 1844. As we did not succeed in identifying the species we put it aside for some time. Recently the senior author started a revision of the bivalve superfamilies Galeommacea and Cyamiacea. During that study it turned out that the species was indeed undescribed and we therefore give its description here.