Leptochiton belknapi Dall, 1878

Schwabe, Enrico, 2008, A summary of reports of abyssal and hadal Monoplacophora and Polyplacophora (Mollusca) *, Zootaxa 1866, pp. 205-222 : 213-214

Leptochiton belknapi Dall, 1878

Leptochiton belknapi Dall 1878: 1 .

While the species was originally described from the Bering Sea of the Alaskan Aleutian Islands, from a depth

of 1840 m “only”, there are subsequent deeper records of this species from the following localities:

­ specimen number unknown; [described as Leptochiton benthus , which is a junior synonym] from the North Pacific, 15 ° north of Hawaii ( 35 ° 41 'N, 157 ° 42 'E), 4206 m ( Haddon 1886)

­ specimen number unknown; [described as Lepidopleurus mesogonus , which is a junior synonym] from Canada, British Columbia, off the Queen Charlotte Islands [ 53 °06’N, 132 ° 14 ’W], 2904 m ( Dall 1902)

­ specimen number unknown; [described as Lepidopleurus halistreptus , which is a junior synonym] from Mexico, off Acapulco ( 14 ° 46 'N, 98 ° 40 'W), 3436 m ( Dall 1902) [locality data from Dall 1908]

­ 3 specimens [described as Lepidopleurus giganteus , which is a junior synonym] from Indonesia, south of Sulawesi Tengarra, Banda Sea ( 06° 24 'S, 124 ° 39 'E), 2798 m ( Nierstrasz 1905)

­ specimen number unknown; [described as Lepidopleurus opacus , which is a junior synonym] from the Gulf of Panama ( 07°05' 30 ''N, 79 ° 40 'W), 2323 m ( Dall 1908)

­ specimen number unknown; [described as Lepidopleurus opacus ] from between the Galapagos Islands and the Peruvian coast ( 04° 33 'S, 87 ° 42.5 'W), 3667 m ( Dall 1908)

­ 1 specimen [as Lepidopleurus (Leptochiton) benthus ( Haddon, 1886) ] from the eastern Pacific ( 15 °N, 125 °W), 4000 m ( Hanselman 1977)

­ Lepidopleurus benthus ( Haddon, 1886) was generally mentioned as occurring at a depth below 4000 m ( Sirenko 1977)

­ 4 specimens [as Leptochiton alveolus ] from the United States of America, Oregon, off Lincoln County ( 44 ° 33.5 'N, 125 ° 14.6 'W), 2000 m ( Ferreira 1979) [this is “ CASIZ RV Ancona ”, data from: http:// www.calacademy.org/research/izg/iz_coll_db/index.asp]

­ 3 specimens [as Leptochiton alveolus ] from the United States of America, California, 10 miles SE off Farallon Islands, SW by S 1 / 4 S ( 37 ° 48 'N, [ 122 ° 58 ’W]), 2341–2741 m ( Ferreira 1979) [this is “ CASIZ USS Mulberry; RV Scofield ”, data from: http://www.calacademy.org/research/izg/iz_coll_db/index.asp]

­ 3 specimens [as Leptochiton alveolus ] from Mexico, off Nayarit, Las Tres Marias Islands ( 21 ° 25 'N, [ 106 ° 28 ’W]), 2996–2999 m ( Ferreira 1979) [this is “ CASIZ 009520”, data from: http://www.calacademy.org/research/izg/iz_coll_db/index.asp]

­ 1 specimen [as Leptochiton alveolus ] from Japan, near Northern Honshu, 2500 m ( Ferreira 1979) [this is “ CASIZ 001818”, data from: http://www.calacademy.org/ research/izg/iz_coll_db/index.asp]

­ 1 specimen [as Leptochiton alveolus ] from off Baja California Sur southwest of Cabo San Lucas ( 22 ° 30.8 '­ 22 ° 37.2 'N, 110 °03.8'­ 110 ° 15.5 'W), 2507–2891 m ( Ferreira 1980)

­ 1 specimen from off northeastern Honshu, Japan ( 38 ° 21.7 'N, 143 ° 25.9 'E), 2930–3020 m ( Wu & Okutani 1984)

­ 4 specimens from south of Izu­Shoto, Japan ( 30 °37.0'N, 140 ° 40.5 'E), 2140 m ( Wu & Okutani 1984)

­ 1 specimen from Izu­Shoto, Japan ( 31 ° 58.1 'N, 140 °21.0'E), 2230–2245 m ( Wu & Okutani 1984)

­ 1 specimen from the Philippines ( 06°08'N, 125 ° 58 'E), 2800 m (Kaas 1990)

­ 2 specimens from the Philippines ( 05°02'N, 125 ° 15 'E), 3250 m (Kaas 1990)

­ 1 specimen from the Philippines ( 14 °05'N, 120 °02'E), 2050 m (Kaas 1990)

­ specimen number unknown; from the Commander Islands [ 54 ° 48 ’N, 166 ° 59 ’E], 100–4400 m ( Sirenko & Agapova 1997)