Colossendeis tenera Hilton 1943

Colossendeis tenera Hilton

Colossendeis tenera Hilton, 1943:2–4.—Hedgpeth, 1943:223–224, fig. 1.

MATERIAL EXAMINED.—CALIFORNIA: Farallons 1-2 (1 adult, 1 juv); Farallons 4-4 (1 spec.); Farallons 5-10 (2 spec.); Farallons 6-7 (1 spec.); Farallons 12-1 (2 spec.); Farallons 14-1 (1 spec.); Farallons 14-9 (1 spec.); Farallons 14-12 (23 spec.); Farallons 16-7 (3 spec.); Farallons 16-8 (1 spec.); Farallons 16-12 (3 spec.); Farallons unknown (FVC1-77) (1 spec.); Farallons 4-1 (2 spec.); Farallons sta F-1 (1 spec.); Farallons sta F-3 (6 spec.); Monterey sta M-1 (2 spec.); Monterey sta M-2 (14 spec.); Monterey sta M-3 (8 spec.); Monterey sta M-4 (18 spec.); Monterey sta M-7 (6 spec.); Monterey sta M-8 (5 spec.); Pioneer sta P-1 (1 spec.); Pioneer sta P-2 (1 spec.); Pioneer sta P-3 (1 spec.); Pioneer sta P-4 (2 spec.).

OREGON: Cr 6112, sta OTB 40–29 (1 spec.); cr 6312C, sta OTB 18-? (1 spec.); cr 63-?, sta OTB 23–06 (1 spec.); cr 6405C, sta OTB 29–13 (1 spec.); cr 6405, sta OTB 30–06B (1 spec.); cr 6405, sta OTB 31–08 (2 spec.); cr 6408, sta OTB 40 (4 spec.); cr 6408, sta OTB 41–01 (6 spec.); cr 6408, sta OTB 42–13B (1 spec.); cr 6501, sta OTB 49–30 (1 spec.); cr 6501B, sta OTB 50–19 (3 spec.); cr 6501B, sta OTB 51–13 (1 spec.); cr 65-?, sta OTB 63–21 (1 spec.); cr 6507, sta OTB 76–11B (2 spec.); cr 6507, sta OTB 77–01 (2 spec.); cr 6507, sta OTB 78–28 (1 spec.); cr 6508, sta OTB 79–22 (4 spec.); cr 6510, sta OTB 92–19 (1 spec.); cr 6510, sta OTB 93–09 (5 spec.); cr 6601, sta OTB 104–13 (1 spec.); cr 6610A, sta OTB 132–20B (1 spec.); cr 6707, sta OTB 184–10 (2 spec.); cr 6707, sta OTB 188–02C (4 spec.); cr 6710, sta OTB 207–04 (1 spec.); cr 6710, sta OTB 208–02 (1 spec.).

Cr 6907C, sta BMT 93–29 (1 spec.); cr 6907C, sta BMT 94–23 (1 spec.); cr 6907C, sta BMT 95–11 (1 spec.); cr 6910A, sta BMT 116–21 (2 spec.); cr 6910A, sta BMT 117–26 (1 spec.); cr 7001B, sta BMT 154–22 (1 spec.); cr 7003B, sta BMT 185–29 (1 spec.); cr 7003B, sta BMT 190–17 (3 spec.); cr 7003B, sta BMT 191–21 (3 spec.); cr 7003B, sta BMT 192–37 (8 spec.); cr 7102B, sta BMT 267–32 (1 spec.); cr 7102B, sta BMT 268–31 (1 spec.); cr 7102B, sta BMT 270–37 (2 spec.); cr 7206B, sta BMT 288–38 (5 spec.); cr 7206B, sta BMT 289–39 (4 spec.); cr 7206B, sta BMT 291–32 (2 spec.); cr 7206B, sta BMT 292–31 (2 spec.); cr 7206B, sta BMT 293–31 (5 spec.); cr 7206B, sta BMT 294–33 (3 spec.); cr 7301F, sta BMT 315–30 (1 spec.); cr 7301F, sta BMT 317–31 (1 spec.); cr 7301F, sta BMT 319–35 (1 spec.); cr 7303A, sta BMT 321–42 (1 spec.); cr 7406B, sta BMT 360–38 (1 spec.).

R/V Commando: 15 May 63 (1 spec.); 28 May 64 (4 spec.); 29 May 64 (11 spec.); 29 May 64 (1 spec.); 30 May 1964 (1 spec.); 30 May 64 (2 spec.).

WASHINGTON: Cr DWD, sta BMT-1 (2 spec.); cr DWD, sta BMT-2 (1 spec.); cr DWD, sta BMT-3 (2 spec.); cr DWD, sta BMT-5 (4 spec.); cr DWD, sta BMT-7 (5 spec.); cr DWD, sta BMT-8 (6 spec.).

DISTRIBUTION.—The types of this species were taken in much the same places as many of specimens reported in this paper. The holotype was taken off Oregon in 1437 m, paratypes were taken off Washington in 1604 m and off southern Alaska in deeper waters at 2869 m. The species is apparently fairly common (249 specimens listed herein) at the above depths and at those of stations reported here. These captures extend its known depths from 914 to 3600 m (the latter from Oregon sta BMT 360–38).

DIAGNOSIS.—Species with a cylindrical proboscis almost equal in length to trunk and a tall conical ocular tubercle. Other conspicuous characters are: a slender tarsus slightly longer than equally slender propodus and a very long claw almost equal to or longer than propodus. Eighth palp segment tiny, as wide as long, and much shorter than more distal segments. Oviger claw slender and about half terminal segment length.

Colossendeis tenera Hilton

Colossendeis tenera Hilton, 1943a:2–4.—Hedgpeth, 1943:223–224, fig. 1.—Child, 1994:14, 16.

MATERIAL EXAMINED.—Bering Sea, W of Pribilof Islands, 57°10′N, 173°45′W, 148 m, R/V Albatross, sta 3487, 13 Jul 1893 (2 stations mixed, locality questionable, 1 spec.); Bering Sea, near Bowers Bank, 54°33′N, 178°45′E, 1019 m, R/V Albatross, sta 4774, 4 Jun 1906 (1 spec.); Aleutians, SE of Agattu Island, 52°14′30″N, 174°13′00″E, 882 m, R/V Albatross, sta 4781, 7 Jun 1906 (1 spec.).

DISTRIBUTION.—Fairly common on slopes and basins of American west coast from middle California to southeast Alaska, in depths of 914 to 3600 m. The above records greatly extend this distribution northwestward to the western Aleutians and reduce its minimum known depth to at least 882 m. The Albatross record of 148 m is very questionable. The other station of the two mixed in the lot is from California and at a much greater depth.

DIAGNOSIS.—Proboscis almost cylindrical, about as long as trunk. Ocular tubercle a tall conspicuous cone with eyes barely distinguishable. Palp with tiny eighth segment no longer than wide, shorter than 2 more distal segments. Legs very slender, almost glabrous, tarsus only slightly longer than propodus. Terminal claw very slender, as long or slightly longer than the propodus.

bathyal to abyssal