3.4 Lucicutia clausi Giesbrecht 1889
Leuckartia clausi Giesbrecht, 1889: p. 812;
1892: p. 359, pI. 19 figs. 5, 6, 12-14,24,27,
pI. 37 fig. 37.
Lucicutia clausi Giesbrecht and Schmeil,
1898: p. 111 - Tanaka, 1963: p. 38, fig. 166Hiilsemann, 1966: p. 709, figs. 12, 13,87-91,
123-126-Park, 1970: p. 517, figs. 211-219Ali-Khan and Ali-Khan, 1982: p. 265, figs.
1-4.
Body length -
females: 2.02-2.25mm (20 specimens)
males: 1.90-2.14mm (16 specimens)
Female. Cephalothorax 2.3 times longer
than wide. Head with poorly developed
lateral processes that are rounded and
minute in form. AI 25-segmented, about 2
segments longer than end of furca. Proportionallengths of cephalothorax and abdomen
65 : 35; proportional lengths of abdominal
somites and furca 31: 10: 10: 12: 37 = 100.
Genital somite longer than wide in dorsal
view, with conspicuous ventral protrusion.
Anal somite longer than preceeding. In P1,
endopod 2-jointed and exopod 3-jointed. In
P2-P5, both endopods and exopods 3jointed. In P2-P4, number and position of
setae is the same. P5 Re3 with 1 apical and 2
lateral spines and 3 internal setae. Apical
spines of exopods progressively smaller from
PI to P5 where they are about 114 length of
last joint.
Male. General body shape as in female.
Proportional lengths of cephalothorax and
abdomen 60: 40; proportional lengths of
abdominal somites and furca 15: 13 : 12: 12 :
Family Lucicutiidae
13: 35 = 100. P1 Ri 2-jointed. In left P5, the
inner distal corner of B2 bearing protrusion
with a cluster of denticles varying in number.
In right P5, inner margin of B2 with small
tooth-like projection; Ri2 leaf-like with 6
setae. Last joint of right exopod elongated
and recurved, with long hairs on inner side.
Remarks
According to Giesbrecht (1892), the spinelike protrusions on the sides of the head of
this species can vary enormously in shape,
from straight to turned backwards. They can
also be greatly reduced or lacking altogether.
In our specimens, these protrusions are
scarsely developed and are similar to those
reported by Hiilsemann (1966) for the
tropical Atlantic. Our specimens differ from
the latter forms, however, since they are
more slender and have longer caudal rami.
They are also similar to those reported by
Ali-Khan and Ali Khan (1982) for the Indian
Ocean but in this case the caudal rami are
even shorter than those described for the
tropical Atlantic. In lateral view, the head
protrudes over the first thoracic somite in
almost all our specimens.
Distribution
L. clausi has been recorded in offshore cold,
temperate and warm waters of all oceanic
regions (Hiilsemann 1966) and also in the
Mediterranean Sea (Scotto di Carlo et ai.
1984) and in Chilean waters (Fagetti 1962). It
has been reported as occurring from the
surface to 3000 m (de Decker and Mombeck
1965), but other authors report its occurrence
at shallower depths up to 1000 m (Deevey
Leuckartia clausi Giesbrecht, 1889: p. 812;
1892: p. 359, pI. 19 figs. 5, 6, 12-14,24,27,
pI. 37 fig. 37.
Lucicutia clausi Giesbrecht and Schmeil,
1898: p. 111 - Tanaka, 1963: p. 38, fig. 166Hiilsemann, 1966: p. 709, figs. 12, 13,87-91,
123-126-Park, 1970: p. 517, figs. 211-219Ali-Khan and Ali-Khan, 1982: p. 265, figs.
1-4.
Body length -
females: 2.02-2.25mm (20 specimens)
males: 1.90-2.14mm (16 specimens)
Female. Cephalothorax 2.3 times longer
than wide. Head with poorly developed
lateral processes that are rounded and
minute in form. AI 25-segmented, about 2
segments longer than end of furca. Proportionallengths of cephalothorax and abdomen
65 : 35; proportional lengths of abdominal
somites and furca 31: 10: 10: 12: 37 = 100.
Genital somite longer than wide in dorsal
view, with conspicuous ventral protrusion.
Anal somite longer than preceeding. In P1,
endopod 2-jointed and exopod 3-jointed. In
P2-P5, both endopods and exopods 3jointed. In P2-P4, number and position of
setae is the same. P5 Re3 with 1 apical and 2
lateral spines and 3 internal setae. Apical
spines of exopods progressively smaller from
PI to P5 where they are about 114 length of
last joint.
Male. General body shape as in female.
Proportional lengths of cephalothorax and
abdomen 60: 40; proportional lengths of
abdominal somites and furca 15: 13 : 12: 12 :
Family Lucicutiidae
13: 35 = 100. P1 Ri 2-jointed. In left P5, the
inner distal corner of B2 bearing protrusion
with a cluster of denticles varying in number.
In right P5, inner margin of B2 with small
tooth-like projection; Ri2 leaf-like with 6
setae. Last joint of right exopod elongated
and recurved, with long hairs on inner side.
Remarks
According to Giesbrecht (1892), the spinelike protrusions on the sides of the head of
this species can vary enormously in shape,
from straight to turned backwards. They can
also be greatly reduced or lacking altogether.
In our specimens, these protrusions are
scarsely developed and are similar to those
reported by Hiilsemann (1966) for the
tropical Atlantic. Our specimens differ from
the latter forms, however, since they are
more slender and have longer caudal rami.
They are also similar to those reported by
Ali-Khan and Ali Khan (1982) for the Indian
Ocean but in this case the caudal rami are
even shorter than those described for the
tropical Atlantic. In lateral view, the head
protrudes over the first thoracic somite in
almost all our specimens.
Distribution
L. clausi has been recorded in offshore cold,
temperate and warm waters of all oceanic
regions (Hiilsemann 1966) and also in the
Mediterranean Sea (Scotto di Carlo et ai.
1984) and in Chilean waters (Fagetti 1962). It
has been reported as occurring from the
surface to 3000 m (de Decker and Mombeck
1965), but other authors report its occurrence
at shallower depths up to 1000 m (Deevey