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bishop museum bulletins in cultural and environmental studies

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Carlton & Eldredge — Mar<strong>in</strong>e Bio<strong>in</strong>vasions of Hawai‘i<br />

39<br />

diaphana (type locality, Australia)] extended the range of this species to the Hawaiian Isl<strong>and</strong>s by<br />

report<strong>in</strong>g it from Kāne‘ohe Bay “from shallow water”, based upon material collected <strong>in</strong> 1972 (W.<br />

Cooke, pers. comm., July 1996). Hoover (1998, 2006) illustrates specimens from Palea Po<strong>in</strong>t, O‘ahu,<br />

<strong>in</strong> 7 m of water.<br />

Based upon many synonyms, this is a cosmopolitan hydroid occurr<strong>in</strong>g <strong>in</strong> the Atlantic, Pacific,<br />

<strong>and</strong> Indian Oceans (Calder, 1991), or it is perhaps a species complex. Calder (1991) concurred with<br />

earlier taxonomic conclusions that a hydroid described from Hawai‘i, Sertularella torreyi, by<br />

Nutt<strong>in</strong>g (1905) is another synonym of S. diaphana. We note, however, that Nutt<strong>in</strong>g’s material was<br />

from deep water (128 m) off the south coast of Moloka‘i, as well as from between 742 <strong>and</strong> 1372 m<br />

off Kaua‘i, suggest<strong>in</strong>g a re-evaluation of shallow-water <strong>and</strong> deep-water taxa may be of value.<br />

Sertularia subtilis Fraser, 1937<br />

[See Discussion]<br />

Cooke (1977a) extended the range of this western tropical Atlantic Ocean (previously known from<br />

Puerto Rico) species <strong>in</strong>to the Pacific Ocean by report<strong>in</strong>g it from Kahe Po<strong>in</strong>t, O‘ahu. However, S. subtilis<br />

is a poorly known species, <strong>and</strong> Cooke’s specimens are regarded as a misidentification of<br />

Tridentata hupferi (D. Calder, pers. comm., June 2003).<br />

Tridentata loculosa Busk, 1852<br />

Cryptogenic<br />

= Sertularia ligulata Thornely, 1904<br />

This widespread tropical Atlantic, Pacific, <strong>and</strong> Indian Ocean hydroid was reported by Cooke [as<br />

Sertularia ligulata (Lamouroux, 1816)], from the surface of Porites lobata <strong>in</strong> 2 m of water <strong>in</strong><br />

Kāne‘ohe Bay (material collected <strong>in</strong> 1972; W. Cooke, pers. comm., July 1996). It was found aga<strong>in</strong><br />

<strong>in</strong> 1999 <strong>in</strong> Kāne‘ohe Bay <strong>and</strong> <strong>in</strong> 2000 <strong>in</strong> Waikīkī (Coles et al., 2002a, 2002b, the latter as Tridentata<br />

ligulata).<br />

Tridentata hupferi (Broch, 1914)<br />

Cryptogenic<br />

= Sertularia subtilis of Cooke (1977a), not Fraser, 1937<br />

Cooke (1977a) reported this species (as Sertularia subtilis) from 2 m of water <strong>in</strong> coral rubble at Kahe<br />

Po<strong>in</strong>t reef, based upon material collected <strong>in</strong> 1972 (W. Cooke, pers. comm., July 1996). Cooke’s identification<br />

of S. subtilis is regarded as a misidentification of Tridentata hupferi by D. Calder (pers.<br />

comm., June 2003). It still occurs <strong>in</strong> Kāne‘ohe Bay, based on 1999 collections identified by D.<br />

Calder (Coles et al., 2002a, as T. humpferi). It was previously known from West Africa, the<br />

Seychelles, <strong>and</strong> Fiji (D. Calder, identification <strong>and</strong> pers. comm. to S.L. Coles, 2001).<br />

Tridentata turb<strong>in</strong>ata (Lamouroux, 1816)<br />

Cryptogenic<br />

This hydroid was first found <strong>in</strong> 2001 <strong>in</strong> Waikīkī (Coles et al., 2002b). It is widely distributed <strong>in</strong> the<br />

Indian, Pacific, <strong>and</strong> Atlantic Oceans (Calder, 1991).<br />

Tridentata distans (Lamouroux, 1816)<br />

Cryptogenic<br />

This species was reported by Cooke (1977a, as Sertularia distans gracilis) from coral rubble at 2 m<br />

at Kahe Po<strong>in</strong>t Reef, O‘ahu (material collected <strong>in</strong> 1972; W. Cooke, pers. comm., July 1996). It was<br />

reported aga<strong>in</strong> <strong>in</strong> 2001 <strong>in</strong> Waikīkī (Coles et al., 2002b). It is widely distributed <strong>in</strong> the Indian, Pacific,<br />

<strong>and</strong> Atlantic Oceans (Calder, 1991).<br />

Tridentata marg<strong>in</strong>ata (Kirchenpauer, 1864)<br />

Cryptogenic<br />

This hydroid was first found <strong>in</strong> 2001 <strong>in</strong> Waikīkī (D. Calder pers. comm. June 2002 to S.L. Coles). It<br />

is widely distributed <strong>in</strong> the Indian, Pacific, <strong>and</strong> Atlantic Oceans (Calder, 1991).

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