Hedgpethia dofleini (Loman 1911)

Hedgpethia dofleini (Loman)

Colossendeis dofleini Loman, 1911a:4–5, pl. 1: figs. 6–13.—Utinomi, 1971a:337 [literature].

Rhopalorxhynchus dofleini.—Stock, 1958b: 114–118 [text].

Hedgpethia dofleini.—Turpaeva, 1973:183 [text], 184–185 [key].

MATERIAL EXAMINED.—HOKKAIDO: S of Akkeshi Bay, 42°41.8′N, 145°08.9′E, 400–479 m, KT83–11, sta B15, 11 Jul 1983 (1 spec.).

DISTRIBUTION.—This species has been taken sporadically from the Bering Sea to south of Kyushu, Japan, in depths of 20 to 923 meters.

Hedgpethia dofleini (Loman)

Colossendeis dofleini Loman, 1911:4–5, pl. 1: figs. 9–13.—Utinomi, 1971:337 [literature].

Rhopalorhynchus doflein.—Stock, 1958b:114–118 [text].

Hedgpethia dofleini.—Turpaeva, 1973:183 [text], 184 [table, key].—Nakamura and Child, 1991:63.

MATERIAL EXAMINED.—Aleutians, W of Unalaska Island, 53°43′40″N, 167°29′30″W, 412 m, R/V Albatross, sta 3227, 23 May 1890 (1 spec.); Aleutians, N of Unalaska Island, 53°33′50″N, 167°46′50″W, 200 m, R/V Albatross, sta 3324, 20 Aug 1890 (1 spec.); Aleutians, off Unalaska Island, 54°01′40″N, 166°48′50″W, 640 m, R/V Albatross, sta 3331, 21 Aug 1890 (2 spec.); Bering Sea, S of Pribilof Islands, 56°02′N, 169°30′W, 221 m, R/V Albatross, sta 3500, 17 Jul 1893 (1 spec.).

Aleutians, W of Amchitka Island, 51°14.5N, 178°39.6′E, 154 m, R/V Lets Go, cruise 861, sta 57, 18 Aug 1986 (3 spec.); Aleutians, off Kiska Island, 51°46.5′N, 177°22.7′E, 137 m, R/V Lets Go, cruise 861, sta 62, 20 Aug 1986 (4 spec.); Aleutians, off Agattu Island, 52°27.7′N, 173°47.1′E, 75 m, R/V Lets Go, cruise 861, sta 63, 23 Aug 1986 (2 spec.); Aleutians, off Attu Island, 53°01.7′N, 173°11.0′E, 137 m, R/V Lets Go, cruise 861, sta 77, 27 Aug 1986 (1 flaccid spec.); Aleutians, off Semisopochnoi Island, 52°10.8′N, 179°51.2′W, 165 m, R/V Lets Go, cruise 861, sta 99, 8 Sep 1986 (2 spec.); same locality, 52°21.4′N, 179°49.2′W, 168 m, R/V Lets Go, cruise 861, sta 103, 10 Sep 1986 (7 spec.).

Aleutians, off Little Tanaga Islands, 52°02.1′N, 176°22.6′W, 249 m, R/V Miller Freeman, cruise 833, sta 56, 6 Aug 1983 (3 spec.).

DISTRIBUTION.—These 27 specimens suggest that this species is rather common in western Aleutian localities and at a wide range of depths. It is known from Kyushu, Japan, to the Bering Sea and Aleutian Islands in depths from 20 to 923 m.

DIAGNOSIS.—Two or 3 times larger than H. chitinosa or larger. Adults of both species should be examined for this comparison to be meaningful. Posterior ridges of each trunk segment without pointed tubercles. Proboscis major swelling is proximal to midpoint. Tarsus nearly equal to propodal length and spinules of sole are not conspicuous. Oviger terminal claw robust, longer than width of terminal segment, which lacks large spine in opposition to claw.