Two species of benthopelagic calanoid copepods of the genusNeoscolecithrixCanu, 1896 s.s. from New Zealand and the segregation ofCenognathan. gen.

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 welldeveloped 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.

New species ofBrodskius,Rythabis, andOmorius(Crustacea: Calanoida) from deep Antarctic waters

“…Schulz and Beckmann (1995) placed the genus Rythabis in the family Tharybidae. This affiliation was supported by Bradford-Grieve (2001) and Vyshkvartzeva (2005) but was not accepted by Ohtsuka et al (2003) and Boxshall and Halsey (2004), who included the genus in the Scolecitrichidae. Markhaseva and Ferrari (2005) considered the family placement as incompletely resolved.…”

New benthopelagic bradfordian calanoids (Crustacea: Copepoda) from the Pacific Ocean with comments on generic relationships

“…With an increasing number of surveys of the deep-sea and particularly of waters immediately above the deep-sea floor, number of species with morphologically diverse chemosensory setae has increased significantly, resulting in several new taxa (Andronov, 1981;Vyshkvartzeva, 1989bSchulz, Beckmann, 1995;Ferrari, Markhaseva, 2000b, c;Bradford-Grieve, 2001;Markhaseva, 2002;Markhaseva, Schnack-Schiel, 2003;Markhaseva, Dahms, 2004). The most recent bradfordian family, Parkiidae was considered monotypic at the time of the discovery of Parkius karenwishneri Ferrari and Markhaseva, 1996; the diagnosis was based on setation patterns of maxilla 2 and the maxilliped, and the epicuticular extensions of Von Vaupel Kleins organ.…”

“…Over the last 15 years, studies of a rather modest number of samples from water immediately above the deep-sea floor has increased the number of calanoid copepods known to science (Bradford-Grieve, 2001;Ferrari, Markhaseva, 2000a, b, c;Ohtsuka et al, 2002Ohtsuka et al, , 2003Schulz, 1996Schulz, Kwasniewsky, 2004;Schulz, Markhaseva, 2000). The mor-phology of these new animals often is quite different from previously described calanoids, and several new genera have been proposed Ferrari, Markhaseva, 2000a;Markhaseva, Dahms, 2004;Markhaseva, Schnack-Schiel, 2003;Schulz, 1996;Schulz, Beckmann, 1995;Vyshkvartzeva, 1989b).…”

“…after Vavilov, 1966). Tharybis inaequalis Bradford-Grieve, 2001 shares with Byrathis a transformed worm-like seta on the distal praecoxal endite of maxilliped (Fig. 29F); T. crenata Schulz, 1995 andT.…”

Xancithrix gen.n. (Copepoda: Calanoida), a new benthopelagic genus of Clausocalanoidea from deep Atlantic waters

“…Recent studies of the poorly known benthopelagic copepods of the World Ocean show that their fauna is highly diverse and includes many new species and genera [e.g., Bradford-Grieve, 2001; Markhaseva & Ferrari, 2005;Ohtsuka et al, 2003;Schulz, 2006]. Every collection from deep waters taken in the vicinity of the sea bed contributes new data on the biodiversity of this biotope.…”