Synonyms: Corallina (Jania) attenuata Kützing (1857) p. 37.

VEGETATIVE FEATURES

Thallus habit: erect, bushy with dense not entangled fronds. Size: 2-2.5cm high. Branching: alternate, dichotomic-pinnate (A) (whorled); distal dichotomous branchlets. Intergenicula: cylindrical, tapered near apices, 0.2-0.4 (0.5)mm long, 0.07-0.1mm in diameter. Genicula: 60-200µm long. Colour of living specimen: from red scarlet to purple. Colour of dried specimen: from white to ivory yellow.

Medulla: cells 50-120µm long. Cortex: cells 8-20µm long. Epithallial cells: rectangular, polygonal, 10-15µm in diameter (B). Cell connections: cell fusions. Other features: trichocytes J-type.

Conceptacles: terminal and axial, pedunculate, generally corniculate with articulated projections, very slender urn-like, globoid (C). Tetra/bisporangial conceptacles: uniporate, 300-400µm in outside diameter x 275-285µm high. Phenology: May-June.

Habitat: epiphytic species often on H. virgatum. Bathymetric distribution: mainly sublittoral. Geographic distribution (Babbini & Bressan 1997):

Alboran Sea (A): Morocco; Middle Western Mediterranean Sea (C): Italy; North Adriatic Sea (E): Italy, Croatia.