Mediterranean coast of Spain, Catalonia, Ebro Delta, Alfaques (= Alfacs) Inlet, near La Banya Peninsula (geocoordinates not provided, estimated with map annexed to Capaccioni-Azzati (1987) to be approximately lat. 40.5818º, long. 0.6123º); fine sand with Cymodocea nodosa Ascherson and some stalks of Caulerpa prolifera Lamouroux and Zostera nana Roth, 0.4 m