The Isopods of Abyssal Depths in the Atlantic Ocean

Eurycope producta G. O. Sars
Figure 33 G-J
Synonyms (incomplete): Eurycope producta G. O. Sars,
1868, p. 113; — 1898, p. 146; — Gurjanova, 1933;
p. 424; — 1938, p. 334; — Hansen, 1916, p. 147;
— Stephensen, 1917, p. 298; — Tattersall, 1905, p.
75; — Hult, 1941, pp. 107-109.
Diagnosis: Eurycope with apex of frontal area
convex, without stout setae, about one-fifth the width
of cephalon. Pleon without spines or incisions, apex
broadly rounded. Inner distal margin of male second
pleopod without vermiform appendage. Peraeonal
somites 5-6 entirely separated. Uropodal rami nearly
equal in length.
Measurements: Adult female 3 mm. length (G. O.
Sars, 1898, p. 146).
Type locality: Norwegian coast from Christiania
Fjord to Vadso (G. O. Sars, 1898, p. 146).
Distribution: Eurybathial arctic-boreal Norway,
south and east of Greenland, south and southwest of
Iceland (Hult, op. cit., pp. 108-109). The Ingolf
collected the species from three stations: Station
25, Davis Strait, latitude 63° 30' N., longitude
54° 25' W., 1096 meters, temperature 3.3° C,
two specimens; Station 78, southwest of Iceland,
latitude 60° 37' N., longitude 27° 52' W., 1505 meters,
temperature 4.5° C., three specimens; Station 138,
northwest of the Faeroes, latitude 63° 26' N., longitude
7° 56' W., 887 meters, temperature —0.6° C.,
one specimen. The maximum depth, according to
Hult (op. cit.), is 2087 meters and the minimum 72
meters. It was not collected by Vema.
Eurycope vicarius Vanhoffen
Figure 34 A-G
Synonyms: Eurycope vicarius Vanhoffen, 1914, pp.
586-587, Figs. 116-117; —Wolff, 1956, pp. 130-132.
Diagnosis: Eurycope with apex of frontal area
convex, without stout setae, around one-tenth the
width of cephalon. Pleon without spines or incisions,
apex rounded. Inner distal margin of male second
pleopod without vermiform appendage. Peraeonal
somites 5-6 entirely separated. Uropodal exopod
about one-third the length of endopod.
Measurements: 1.6 mm., 2.5 mm., 3 mm., 3.5 mm.,
4.5 mm., and 9 mm. length of six specimens (Vanhoffen,
op. cit., p. 587). Wolff's (op. cit.) female
lectotype was 8.8 mm. long and 2.8 mm. wide.
Type locality: Antarctic continent, 3423 meters,
3 April 1903, Gauss (Vanhoffen, op. cit.).
Distribution: Antarctic 3423 meters (Vanhoffen)
and taken by Vema from the South Atlantic, L.G.O.
Biotrawl No. 201, seven females, cat. no. 1-234.
The specimen from Gauss Station at 385 meters has
been subsequently described as E. gausii by Wolff
(1956, op. cit.).
ABYSSAL ATLANTIC ISOPODS
Eurycope complanaia Bonnier
Figure 34 H-L
141
Synonyms: Eurycope complanata Bonnier, 1896, p.
601, PI. 34; — Hansen, 1916, pp. 145-146, PI. 13.
Diagnosis: Eurycope with apex of frontal area
lacking spines, apex sharply concave, around oneeleventh
the width of cephalon. Pleon without
spines or incisions, apex pointed. Inner distal margin
of male second pleopod with pronounced vermiform
appendage. Peraeonal somites 5-6 entirely
separated. Uropodal exopod one-third shorter than
endopod.
Measurements: Male 5 mm. long (Bonnier, op. cit.)
Type locality: North Atlantic, Bay of Biscay,
latitude 44° 17' N., longitude 4° 38' W., 950 meters
(Hansen, op. cit.).
Distribution: North Atlantic. Taken by Ingolf at
Station 24, Davis Strait, latitude 63° 06' N., longitude
56° 00' W., 2258 meters, temperature 2.4° C., four
specimens, and Station 36, Davis Strait, latitude
61° 50' N., longitude 56° 21' W.,2702 meters, temperature
1.5° C., two specimens; and by Vema from L.G.O
Biotrawl No. 7, one male and four fragments, cat. no.
135.
Eurycope murrayi Walker
Figure 34 M
Synonyms (incomplete): Munnopsis( ?) murrayi
Walker, 1903, p. 227, PI. 18; — Tattersall, 1905,
pp. 27, 73; — 1911, p. 190 (ref. Hansen, 1916).
Munneurycope tjalfiensis Stephensen, 1913, p. 99, Figs.
6-8; — 1915, p. 23, Figs. 12-13. Eurycope murrayi
Walker, Hansen, 1916, pp. 137-140, PI. 12.
Diagnosis: Eurycope with frontal area probably
obsolete. Pleon without projecting spines or incisions,
apex rounded. Peraeonal somites 5-6 entirely separated.
Uropodal exopod around one-tenth the length
of the endopod.
Measurements: Length varies from about 7 mm.
to a little over 8 mm., male (Stephensen, 1915, p. 24).
Type locality: West of Ireland between 350 and
1710 fathoms (Hansen, 1916, p. 139).
Distribution: Taken in the North Atlantic from the
following places: West of Cape Farewell: Tjalfe,
latitude 60° 07' N., longitude 48° 26' W., 2000 meters
wire out, one specimen (Stephensen, 1915).
South of Iceland: Thor latitude 61° 34' N., longitude
19° 05' W., 1800 meters wire out, four specimens,
Thor, latitude 61° 30' N., longitude 17° 08' W., 1800
meters wire out, fourteen specimens; Thor, latitude
62°47'N., longitude 10° 03' W., 1500 meters wire
out, two specimens.
Southwest of the Faeroes: Thor, latitude 60° 00' N.,
longitude 10° 35' W., 1000 meters wire out, three
specimens; Thor, latitude 59° 52' N., longitude
9° 53' W., 1500 meters wire out, five and a half