NEW RECORDS OF CERAMIALES (RHODOPHYTA) FOR THE NORTH-WESTERN MEDITERRANEAN

The occurrence of some uncommon species of Ceramiales (Rhodophyta) in some areas of North-Western Italy is here reported on the basis of col lections made over the last few years. Antithamnion algeriense is a ne w record for Italy. For Antithamnion piliferum and Laurencia minuta su bsp. scammaccae, species known for Spain and Southern Italy, the prese nt records extend their geographical distribution northward. For Laure ncia glandulifera female gametophytes bearing cystocarps were observed for the first time. Data on the geographical distribution of these sp ecies are also reported and discussed.