Two species of benthopelagic calanoid copepods of the genus Neoscolecithrix Canu, 1896 s.s. from New Zealand and the segregation of Cenognatha n. gen

• Published in: New Zealand journal of marine and freshwater research 2001-09, Vol.35 (4), p.781-793
• Main Author: Bradford-Grieve, Janet M.
• Format: Article
• Language: English
• Subjects: benthopelagic; Calanoida; Cenognatha; Copepoda; Marine; Neoscolecithrix; Neoscolecithrix imagna; Neoscolecithrix ornata; new genus; new species; Tharybidae
• ISSN: 0028-8330; 1175-8805
• DOI: 10.1080/00288330.2001.9517042

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); mandibu-lar 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.