Genus Hydroides Gunnerus, 1768
(AL) Hydroides dianthus (Verrill, 1874) DISTRIBUTION: NA, CA, SA.
LITERATURE RECORDS: Zibrowius 1970; Marano et al. 1976; Bianchi 1980, 1981b; Vaccarella & Pastorelli 1982; Bianchi 1983a; Bianchi & Morri 1984; Parisi et al. 1985; Occhipinti-Ambrogi et al. 1987, 1988; Gherardi et al. 1993; Požar-Domac 1994; Gabriele et al. 1999; Crema et al. 2000; Rossi et al. 2001; Mistri et al. 2001, 2002a, 2002c; Nonnis et al. 2002; Munari et al. 2003; Marchini et al. 2004; Ponti & Abbiati 2004; Munari et al. 2005, 2006; Castelli et al. 2008; Santelli et al. 2009.
NEW RECORDS: BM19, BM78.
REMARKS: Alien species from the North West Atlantic (Zenetos et al. 2010). Reported in the Mediterranean Sea for the first time in Izmir Bay (Turkey, Aegean Sea) (Zibrowius 1992).
DEPOSITED MATERIAL: BM19, 29.09.2010., 1 spec. (PMR-17617).
(AL) Hydroides elegans (Haswell, 1883)
DISTRIBUTION: NA, CA, SA.
LITERATURE RECORDS: Marano et al. 1976; Relini et al. 1977; Bianchi 1981b; Vaccarella & Pastorelli 1982; Bianchi 1983a; Fassari 1983; Bianchi & Morri 1984; Occhipinti-Ambrogi et al. 1987; Gherardi et al. 1993; Požar- Domac 1994; Giangrande et al. 2003, 2004; Castelli et al. 2008.
NEW RECORDS: BM76.
REMARKS: Alien species with primarily circumtropical distribution (Zenetos et al. 2010). Originally described from Sydney, Australia and now widely distributed around the world. Reported for the first time in the Mediterranean Sea at Naples (Italy, Tyrrhenian Sea) (Zibrowius 1992).
Hydroides helmatus (Iroso, 1921)
DISTRIBUTION: NA, CA, SA.
LITERATURE RECORDS: Zavodnik 1967c; Zavodnik & Igić 1968a, 1968b; Zibrowius 1970; Katzmann 1972; Požar 1972; Marano et al. 1976; Vaccarella et al. 1981; Igić 1982; Vaccarella & Pastorelli 1982; Požar-Domac 1986; Vrišer 1986; Špan et al. 1989; Požar-Domac 1994; Zahtila 1995; Giangrande et al. 2003, 2004; Castelli et al. 2008. NEW RECORDS: BM80.
OTHER REPORTED NAMES: Hydroides helmata (Iroso, 1921); Eupomatus helmatus Iroso, 1921; Eupomatus helmata Iroso, 1921 .
Hydroides niger Zibrowius, 1971
DISTRIBUTION: NA, SA.
LITERATURE RECORDS: Zibrowius 1970 Katzmann 1971, 1972; Amoureux 1975; Velimirov & Sint 1975; Marano et al. 1976; Bianchi 1981b; Vaccarella et al. 1981; Vaccarella & Pastorelli 1982; Gherardi et al. 1993; Požar- Domac 1994; Giangrande et al. 2003, 2004; Castelli et al. 2008.
OTHER REPORTED NAMES: Hydroides nigra Zibrowius, 1971 .
Hydroides norvegicus Gunnerus, 1768
DISTRIBUTION: NA, CA, SA.
LITERATURE RECORDS: Fauvel 1938; Igić 1968; Zavodnik & Igić 1968b; Zibrowius 1970; Katzmann 1972; Požar 1972; Relini et al. 1977; Igić 1979, 1982; Amoureux 1983a; Požar-Domac 1983; Stjepčević et al. 1984; Požar- Domac 1986, 1994; Zahtila 1995, 1997; Zavodnik & Kovačić 2000; Aleffi et al. 2003; Simonini et al. 2005a, 2007; Castelli et al. 2008.
NEW RECORDS: BM21, BM52, BM53, BM54.
OTHER REPORTED NAMES: Hydroides norvegica Gunnerus, 1768 .
Hydroides pseudouncinatus pseudouncinatus Zibrowius, 1968
DISTRIBUTION: NA, CA, SA.
LITERATURE RECORDS: Grube 1861; Lorenz 1863; Grube 1864; Stossich 1876, 1883; Carus 1884; Graeffe 1905; Fauvel 1938; Meštrov 1957; Laubier 1962; Zavodnik & Igić 1968a, 1968b; Zibrowius 1970; Amoureux & Katzmann 1971; Katzmann 1971, 1972; Marcuzzi 1972; Požar 1972; Matjašić & Štirn 1975; Velimirov & Sint 1975; Marano et al. 1976; Bianchi 1980, 1981b; Vaccarella et al. 1981; Igić 1982; Vaccarella & Pastorelli 1982; Požar-Domac 1986; Gherardi et al. 1993; Požar-Domac 1994; Zahtila 1995; Mizzan 2000; Zavodnik & Kovačić 2000; Fraschetti et al. 2002; Giangrande et al. 2003, 2004; Casellato et al. 2007; Casellato & Stefanon 2008; Castelli et al. 2008.
NEW RECORDS: BM6, BM81, BM84, BM85, BM87.
OTHER REPORTED NAMES: Hydroides pseudouncinata pseudouncinata Zibrowius, 1971; Hydroides pseudouncinatus Zibrowius, 1968; Serpula uncinata (Philippi, 1844); Eupomatus uncinatus (Philippi, 1844); Hydroides uncinata Philippi, 1844 .
REMARKS: The Adriatic records reported in the literature as Serpula uncinata (Philippi, 1844), Eupomatus uncinatus (Philippi, 1844) and Hydroides uncinata Philippi, 1844 are herein attributed to H. pseudouncinatus pseudouncinatus .
Hydroides stoichadon Zibrowius, 1971
DISTRIBUTION: NA.
LITERATURE RECORDS: Bianchi 1981a; Požar-Domac 1994; Castelli et al. 2008. NEW RECORDS: BM76.