Hedgpethia chitinosa (Hilton 1943)

Hedgpethia chitinosa (Hilton)

Colossendeis chitinosa Hilton, 1943b:4.—Utinomi, 1971a:337–338 [literature].

Rhopalorhynchus chitnosum.—Stock, 1970b:9 [key].

Hedgpethia californica chitinosa.–Turpaeva, 1973:186–189, table 3.

Hedgpethia chitinosa.—Nakamura and Child, 1983:63.—Nakamura, 1987: 36–37, pl. 33.

MATERIAL EXAMINED.—KYUSHU: SW of Danjo Archipelago, 31°07.2′N 127′37.0′E, 126 m, 17 Jun 1964 (1). HONSHU: Toyama Bay, 22 Oct 1984 (1 juv). Sagami Bay, off Kisami 37–41 m, 27 Jul 1982 (1 spec.). Off Shimoda, 40–50 m, 6 Apr 1983 (1 spec.). W of Misaki, 46–50 m, 10 Jul 1985 (19). Sanriku-oki, 39°07.2′N, 142°23.1′E, 926–950 m, KT84– 9, sta SR6, 10 Jul 1984 (1spec.). Kii Strait, 33°24.3′N 135°43.0′E, 293–335 m, KT84–12 sta 6, 30 Aug 1984 (1 juv); 33°28.6′N, 135°28.9′E, 353–354 m, KT84–12, sta 15, 1 Sep 1984 (12 spec.); 33°06.8′N, 135°12.5′E, 119–120 m, KT84–12, sta 24, 2 Sep 1984 (1 juv); 33°35.9′N, 135°09.9′E, 322–346 m, KT84–12, sta 27(30 spec.).

DISTRIBUTION.—The known distribution for this species is from the Aleutian Islands to Kyushu, Japan, and the above records extend this range to the Sea of Japan, an area where few collections have been reported. The wide depth distribution of this species, 20 to about 800 meters, is increased to 950 meters by the above record from Sanriku-oki, Honshu.

Hedgpethia chitinosa (Hilton)

Colossendeis chitinosa Hilton, 1943:4.—Utinomi, 1971:337–338 [literature].

Rhopalorhynchus chitinosum.—Stock, 1970:9 [key].

Hedgpethia californica chitinosa.—Turpaeva, 1973:186–189, table 3.

MATERIAL EXAMINED.—Suruga Bay: Tansei Maru cruise KT69-12, sta 4 (6 specimens); sta 5 (17 specimens).

Sagami Bay: Tansei Maru cruise KT69-12, sta 9 (2 specimens). Tansei Maru cruise KT71-2, sta 29 (1 specimen).

Hedgpethia chitinosa (Hilton)

Colossendeis chitinosa Hilton, 1943a:4.—Utinomi, 1971:337–338 [literature].

Rhopalorhynchus chitinosum.—Stock, 1970:9 [key].

Hedgpethia californica chitinosa.—Turpaeva, 1973:186–189, table 3.

Hedgpethia chitinosa.—Nakamura and Child, 1983:63; 1991:63.—Nakamura, 1987:36–37, pl. 33.

MATERIAL EXAMINED.—Bering Sea, S of Pribilof Islands, 56°02′N, 169°30′W, 221 m, R/V Albatross, sta 3500, 17 Jul 1893 (1 spec., Hilton's holotype specimen, USNM 81496); Gulf of Alaska, off Trinity Islands, 56°00′N, 154°20′W, 291 m, R/V Albatross, sta 2853, 9 Aug 1888 (1 spec.).

DISTRIBUTION.—Known from many Japanese localities including the Sea of Japan, it is also found across the North Pacific from the Russian Far East to the Aleutian Islands. The above records extend this distribution to the Pribilof Islands and the Gulf of Alaska. It has a very wide depth range, from 20 to 950 m, if all records are to be credited.

DIAGNOSIS.—Proboscis with major distal swelling from midpoint to about halfway to tip. Each dorsomedian trunk swelling sometimes with conical projection. Oviger claw shorter than its segment diameter, with distal spine larger than others in opposition to claw. Tarsus sometimes equal to or sometimes slightly longer than propodus, both with tiny sole spines. Terminal claw very long, usually slightly shorter than propodus but sometimes as long as segment.

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