New Zealand Journal of Marine and Freshwater Research abstracts
Two species of benthopelagic calanoid copepods of the genus
Neoscolecithrix Canu, 1896 s.s. from New Zealand and the segregation
of Cenognatha n. gen.
JANET M. BRADFORD-GRIEVE
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 14 901
Wellington, New Zealand
email: j.grieve@niwa.cri.nz
Abstract Two species of benthopelagic calanoid Copepoda,
Neoscolecithrix cf.
magna (Grice, 1972) and
N. ornata n.
sp., are described from the upper slope off North Cape, New Zealand.
Neoscolecithrix ornata is distinguished from other species of
Neoscolecithrix Canu, 1896 s.s. that have a female leg 5 terminal
segment with 4 spines (2 terminal and 1 on each border) principally by the
transverse row of long, fine spines on the female genital double somite; and by
the more squat terminal segment of leg 5 (length/width ratio about 3.7). This
is the second time
Neoscolecithrix has been recorded from New Zealand. A
new genus,
Cenognatha n. gen., is distinguished from
Neoscolecithrix principally because: rostrum short (bearing 2
filaments); mandibular gnathobase masticatory margin with slender dorsal
spinulose seta; maxilla endite 1 with 5 well-developed setae, endite 3 without
brush-like sensory seta, endopod usually with 3 long worm-like sensory setae
and 5 brush-like setae; posterodistal border of basis of legs 1-3 without
spines; distal segment of female leg 5 and its basis subequal in length; male
leg 5 of similar lengths on both sides (styliform on right), endopod present at
least on 1 side, 1-segmented and spine-like on right.
Keywords Copepoda; Calanoida; benthopelagic; new species; new
genus; Neoscolecithrix; Cenognatha; Tharybidae
M00071
Received 4 October 2000; accepted 26 January 2001
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