86
Systematic Account
3.11 Centro pages bradyi
Wheeler 1899
Centro pages bradyi Wheeler, 1899: p. 174,
fig. 12 - Esterly, 1905: p. 172, fig. 32 -
Wilson, 1932: p. 86, fig. 59 - Rose, 1933: p.
187, fig. 216 - Brodskii, 1950: p. 318, fig. 221
- Vidal, 1968: p. 35, pI. 13 figs. 6-11 (only
male) - Ramirez, 1969: p. 74, figs. 107-109,
111, 114.
Centro pages violaceus Brady, 1883: p. 83, pI.
27 figs. 1-14.
Body length -
females: 1.96-2.06mm (3 specimens)
Female. Body flask-like in shape. Cephalothorax 2 times longer than wide, 2.7
times longer than abdomen. Last thoracic
somite with rounded posterior comers.
Dorsal surface of cephalothorax ornated with
dense spinules. Postero-dorsal margin of first
somite ornated with conspicuous protuberance. Abdomen 3-segmented, symmetrical in dorsal view. Proportional lengths
of abdominal somites and furca 24: 12: 30 : 34
= 100. Genital somite symmetrical in
dorsal view, extending in part over second
abdominal somite on ventral side. Anal
somite with strong prominence on ventral
side. Caudal rami robust and divergent, with
strong tubercle on ventral surface at distal margin between two outer setae. P5
biramous; Re2 with a robust spiniform process on inner side and finely serrated margin
on external side. Endopod not protruding
beyond apex of spiniform process of exopod.
Remarks
This species is easily distinguished from other
centropagiides due to the rounded posterior
comers of the cephalothorax, the symmetrical
genital somite and the pegs on the ventral
surface of the caudal rami. The specimens (3
females, 1 copepodite) we recorded are
in the same size range as reported in the
literature. In our specimens, the anal somite
bears a prominent ventral process that has
been previously reported only by Ramirez
(1969).
Distribution
Very widely distributed in·' the temperate
Atlantic, Mediterranean Sea, Pacific Ocean,
and near the coast of Australia. Wheeler
(1899) described this species from specimens
taken in the Gulf Stream off the East coast of
the United States. Farran (1929) found it off
New Zealand in surface and subsurface
waters. Brodskii (1950) recorded C. bradyi
near the Kurile Islands in the NW Pacific.
Ramirez (1969) reported this species in
Argentinian waters from 100 to 1000 m
depths. Fagetti (1962), Vidal (1968) and
Marin and Antezana (1985) reported it in
Chilean waters. In the present study, C.
bradyi was found from 0-200 m at two stations at the Pacific entrance of the Straits and
from 0-50m at a station in front of Baia
Inutil. This represents a first record in the
Magellan region.
Systematic Account
3.11 Centro pages bradyi
Wheeler 1899
Centro pages bradyi Wheeler, 1899: p. 174,
fig. 12 - Esterly, 1905: p. 172, fig. 32 -
Wilson, 1932: p. 86, fig. 59 - Rose, 1933: p.
187, fig. 216 - Brodskii, 1950: p. 318, fig. 221
- Vidal, 1968: p. 35, pI. 13 figs. 6-11 (only
male) - Ramirez, 1969: p. 74, figs. 107-109,
111, 114.
Centro pages violaceus Brady, 1883: p. 83, pI.
27 figs. 1-14.
Body length -
females: 1.96-2.06mm (3 specimens)
Female. Body flask-like in shape. Cephalothorax 2 times longer than wide, 2.7
times longer than abdomen. Last thoracic
somite with rounded posterior comers.
Dorsal surface of cephalothorax ornated with
dense spinules. Postero-dorsal margin of first
somite ornated with conspicuous protuberance. Abdomen 3-segmented, symmetrical in dorsal view. Proportional lengths
of abdominal somites and furca 24: 12: 30 : 34
= 100. Genital somite symmetrical in
dorsal view, extending in part over second
abdominal somite on ventral side. Anal
somite with strong prominence on ventral
side. Caudal rami robust and divergent, with
strong tubercle on ventral surface at distal margin between two outer setae. P5
biramous; Re2 with a robust spiniform process on inner side and finely serrated margin
on external side. Endopod not protruding
beyond apex of spiniform process of exopod.
Remarks
This species is easily distinguished from other
centropagiides due to the rounded posterior
comers of the cephalothorax, the symmetrical
genital somite and the pegs on the ventral
surface of the caudal rami. The specimens (3
females, 1 copepodite) we recorded are
in the same size range as reported in the
literature. In our specimens, the anal somite
bears a prominent ventral process that has
been previously reported only by Ramirez
(1969).
Distribution
Very widely distributed in·' the temperate
Atlantic, Mediterranean Sea, Pacific Ocean,
and near the coast of Australia. Wheeler
(1899) described this species from specimens
taken in the Gulf Stream off the East coast of
the United States. Farran (1929) found it off
New Zealand in surface and subsurface
waters. Brodskii (1950) recorded C. bradyi
near the Kurile Islands in the NW Pacific.
Ramirez (1969) reported this species in
Argentinian waters from 100 to 1000 m
depths. Fagetti (1962), Vidal (1968) and
Marin and Antezana (1985) reported it in
Chilean waters. In the present study, C.
bradyi was found from 0-200 m at two stations at the Pacific entrance of the Straits and
from 0-50m at a station in front of Baia
Inutil. This represents a first record in the
Magellan region.