The non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with notes on their life-cycles: an illustrated guide Author Gravili, Cinzia Author Vito, Doris De Author Camillo, Cristina Gioia Di Author Martell, Luis Author Piraino, Stefano Author Boero, Ferdinando text Zootaxa 2015 3908 1 1 187 journal article 42365 10.11646/zootaxa.3908.1.1 6f1d1977-6b97-4789-828c-76ed250cf1ae 1175-5326 242729 D6AD2B49-170B-4D9C-84AA-DBE0FEEAD8BE Hebella brochii (Hadzi, 1913) Fig. 74 See Boero et al. (1997a) for a complete synonymy. FIGURE 74. Hebella brochii : two hydrothecae (modified after Boero et al. 1997a). Scale bar: 250 µm. Material examined. HCUS-S 0 81 (Hydrozoa Collection, University of Salento—fauna of the Salento Peninsula). Description (based on our own observations; Boero et al. 1997a ; De Vito, 2006): Hydroid. Hydrorhiza reptant; colonies stolonal; hydrothecae with base wider or as wide as opening, flared margin, with perisarcal diaphragm, perisarcal thickenings and corrugated hydrothecal walls, pedicel short but distinct. Gonothecae cylindrical, with a smooth or slightly crenate wall, substantially larger than the hydroteca; provided with a 4-valved operculum; containing only one medusoide per gonotheca; born on the hydrorhiza, on a short stalk. Eumedusoid: ovoid, with abundant exumbrellar nematocysts close to the umbrella margin; without manubrium, mouth and gastric cavity; with 4 radial canals and a circular canal; gonads already present when the medusoid is released, located centrally on each radial canal and are most developed in the distal portion; velum conspicuous; 4 primary perradial marginal bulbs devoid of tentacles, and 4 secondary marginal interradial bulbs smaller than the primary ones. Cnidome. Microbasic mastigophores. Habitat type and substrate. Epizoic on hydroid Synthecium evansi (depth range: 3–125 m ) ( Stechow 1919 , 1923 ; Boero & Fresi 1986 ; De Vito 2006; this study). Seasonality. November–March ( Boero & Fresi 1986 ; De Vito 2006; this study) in the Mediterranean Sea. Reproductive period. November (De Vito 2006) in Salento waters. Distribution. Endemic to the Mediterranean ( Marinopoulos 1981 ; Boero et al. 1997a ; Bouillon et al. 2004; Gravili et al. 2008a ). Records in Salento. Rare at Otranto (De Vito 2006; Gravili 2006; Gravili et al. 2008a ; this study). Remarks. Gonotheca and released eumedusoid of this species have been described by De Vito (2006). References. Stechow (1919 , 1923 ), Leloup (1934) , Picard (1951a , 1958a ), Riedl (1959) , Marinopoulos (1981) , Boero & Fresi (1986) , Boero et al. (1997a) , Bouillon et al. (2004), De Vito (2006), Gravili (2006), Gravili et al. (2008a) .