3.7 Scina borealis Sars, 1883
Clydonia borealis Sars, 1883: p. 76, tab. 3 fig. 1ab.
Scina borealis Sars, 1895: p. 20, pl. 8-Chevreux,
1919: p. 16-Wagler, 1926: p. 337, figs. 9-11-Dick,
1970: p. 29 (key)- Vinogradov et al., 1982: p. 146,
fig.65.
Body length -
females: 2.6-6.0 mm (4 specimens)
males: 4.9-5.3 (3 specimens)
Female. Head deeper than long. A2 small and filiform. 1st maxilla with outer lobe that is strongly
serrated at apex and hairy at the base; inner lobe
smooth and bearing small apical tooth. Maxilliped with well-developed, lanceolated outer
lobes; inner lobes entirely fused. 1st pereopod
with carpus longer than metacarpus. 2nd pereopod with carpus and metacarpus almost of the
same length. 5th pereopod with hasis bearing
spines on either margin and terminating with
sharp process that overhangs ischial segment;
metacarpus smaller than carpus. 6th pereopod
shorter than 5th. 7th pereopod small and weak.
Outer rami of 1st and 2nd uropods spine-like;
outer rami oflast uropod as long as peduncle. 1st
uropod ornated with fine teeth on outer margin;
inner margin bearing strong spines along entire
length. 2nd uropod with smooth outer margin
and denticulated inner margin similar to outer
margin of inner ramus and inner margin of outer ramus of 3rd uropod. Telson small and acutely
triangular.
- - - - - - - - - - - - - - -
Suborder HYPERIIDEA
Family Scinidae
Male. General body shape as female. A2 as long
as body, with elongated last peduncle article.
Remarks
According to Wagler (1926), the main characteristics of the species include the following: maxilliped with well-developed, sharp externallobes;
Sth pereopod with merus equal to carpus; propodus reduced compared to carpus; basipod
bearing stout spines on either side; 1st uropod
with long spines on inner margin; 3rd uropod
with outer ramus almost equal to peduncle.
Distribution
Chevreux (1919) reports that the Prince ofMonaco collected the species in the Atlantic Ocean and
Mediterranean Sea. The species has also been
sampled in the Indian Ocean as well as in Antarctic waters. It is considered a pan-oceanic species
with an ample vertical distribution range (Thurston 1976). Bogorov (1958) considers S. borealis
as a characteristic amphipod in the 200-500-mdepth layers of the NW boreal Pacific Ocean. Vinogradov (1970) reports a depth range for the
species from mesopelagic (200-500 m) to bathypelagic (2000-3000 m) waters. In the Straits of
Magellan, it was found only at 2 very deep Pacific
stations. S. borealis was distributed at all depths
from the surface to 700 m.
Clydonia borealis Sars, 1883: p. 76, tab. 3 fig. 1ab.
Scina borealis Sars, 1895: p. 20, pl. 8-Chevreux,
1919: p. 16-Wagler, 1926: p. 337, figs. 9-11-Dick,
1970: p. 29 (key)- Vinogradov et al., 1982: p. 146,
fig.65.
Body length -
females: 2.6-6.0 mm (4 specimens)
males: 4.9-5.3 (3 specimens)
Female. Head deeper than long. A2 small and filiform. 1st maxilla with outer lobe that is strongly
serrated at apex and hairy at the base; inner lobe
smooth and bearing small apical tooth. Maxilliped with well-developed, lanceolated outer
lobes; inner lobes entirely fused. 1st pereopod
with carpus longer than metacarpus. 2nd pereopod with carpus and metacarpus almost of the
same length. 5th pereopod with hasis bearing
spines on either margin and terminating with
sharp process that overhangs ischial segment;
metacarpus smaller than carpus. 6th pereopod
shorter than 5th. 7th pereopod small and weak.
Outer rami of 1st and 2nd uropods spine-like;
outer rami oflast uropod as long as peduncle. 1st
uropod ornated with fine teeth on outer margin;
inner margin bearing strong spines along entire
length. 2nd uropod with smooth outer margin
and denticulated inner margin similar to outer
margin of inner ramus and inner margin of outer ramus of 3rd uropod. Telson small and acutely
triangular.
- - - - - - - - - - - - - - -
Suborder HYPERIIDEA
Family Scinidae
Male. General body shape as female. A2 as long
as body, with elongated last peduncle article.
Remarks
According to Wagler (1926), the main characteristics of the species include the following: maxilliped with well-developed, sharp externallobes;
Sth pereopod with merus equal to carpus; propodus reduced compared to carpus; basipod
bearing stout spines on either side; 1st uropod
with long spines on inner margin; 3rd uropod
with outer ramus almost equal to peduncle.
Distribution
Chevreux (1919) reports that the Prince ofMonaco collected the species in the Atlantic Ocean and
Mediterranean Sea. The species has also been
sampled in the Indian Ocean as well as in Antarctic waters. It is considered a pan-oceanic species
with an ample vertical distribution range (Thurston 1976). Bogorov (1958) considers S. borealis
as a characteristic amphipod in the 200-500-mdepth layers of the NW boreal Pacific Ocean. Vinogradov (1970) reports a depth range for the
species from mesopelagic (200-500 m) to bathypelagic (2000-3000 m) waters. In the Straits of
Magellan, it was found only at 2 very deep Pacific
stations. S. borealis was distributed at all depths
from the surface to 700 m.