Diversity of Porifera in the Mediterranean coralligenous accretions, with description of a new species Author Bertolino, Marco Author Cerrano, Carlo Author Bavestrello, Giorgio Author Carella, Mirco Author Pansini, Maurizio Author Calcinai, Barbara text ZooKeys 2013 336 1 37 http://dx.doi.org/10.3897/zookeys.336.5139 journal article http://dx.doi.org/10.3897/zookeys.336.5139 1313-2970-336-1 Cliona burtoni Topsent, 1932 Figs 4 A-L Cliona burtoni Topsent, 1932: 577. Material examined. Specimen IG-S-BL1-F5B-spB; dry state, Gallinara Island (station 3, Sciusciau ) 44°01'34"N , 8°13'45"E , depth 30 m, collected 17-06-2009. The specimen was entirely used for spicule preparations. Description. Boring sponge in alpha growth form, occupying a surface of 1 cm2 in a section of conglomerate. Colour beige in dry state. Skeleton. Not observed. Spicules. Macroscleres: tylostyles to subtylostyles straight or slightly curved, 132 (225) 287 x 5 (6) 7.5 μm . Heads with a rounded or oval tyle, sometimes in terminal position but more often shifted along the shaft (Figs 4A, B, C). Microscleres: spirasters of various shape and thickness, straight or curved, 10 (26.5) 45 x 1.25 (10) 17.5 μm . The most abundant have scattered conical spines (Figs 4D, E, F, G, H, I, J, K) and numerous are amphiaster-like (Figs 4H, I, K). The smaller ones are microspinated (Fig. 4J, L). Figure 4. Cliona burtoni . A-C Tylostyle heads D-L Spirasters of various shape and thickness. Distribution and discussion. This is a Mediterranean endemic species ( Pansini and Longo 2008 ) originally described from Corsica (Strait of Bonifacio), where it is known to bore into calcareous rocks and mollusc shells ( Topsent 1932 ). This is a new record for the Ligurian Sea (Gallinara Island) and the coralligenous assemblage and the first finding after the original description.