The Fucales (Ochrophyta, Phaeophyceae) of the Island of Pantelleria (Sicily Channel, Mediterranean Sea): a new contribution Author Marletta, Giuliana Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche 60131 Ancona, Italy g.marletta@univpm.it Author Lombardo, Andrea Department of Biological, Geological and Environmental Sciences, University of Catania, 95124 Catania, Italy text Italian Botanist 2023 2023-06-15 15 137 163 http://dx.doi.org/10.3897/italianbotanist.15.103217 journal article http://dx.doi.org/10.3897/italianbotanist.15.103217 2531-4033-15-137 A0ED26AE219752299C11A734C6D0F79E Cystoseira foeniculacea f. tenuiramosa (Ercegovic) A. Gomez Garreta, M. C. Barcelo , M. A. Ribera & J. Rull Lluch Fig. 8A, B Cystoseira discors f. tenuiramosa Ercegovic. Basionym. Cystoseira ercegovicii f. tenuiramosa ( Ercegovic ) Giaccone, Cystoseira schiffneri f. tenuiramosa ( Ercegovic ) Giaccone. Synonyms. Morphology of specimens from Pantelleria. C. foeniculacea f. tenuiramosa is caespitose, fixed to the substrate by a discoid holdfast from which several cylindrical axes originate. The apices are prominent and spinose. Primary branches are cylindrical, sometimes compressed, and knotty. Higher order branches are filiform, cylindrical and without spinose appendages. Habitat. During the monitoring activities, this form was only observed at Cala Levante at 8-10 m depth. Distribution. This form is distributed both in the Atlantic Ocean (Canary Islands) and in the Mediterranean Sea (Adriatic, Balearic Islands, Cyprus, Spain, France, Greece, Italy, Tunisia and Turkey) ( Blanfune et al. 2022 ). Figure 8. Cystoseira foeniculacea f. tenuiramosa A habit B detail of a prominent and spinose apex.