Species Card of Copepod
Cyclopoida ( Order )
    Oncaeidae ( Family )
        Oncaea ( Genus )
Oncaea curvata  Giesbrecht, 1902   (F,M)
Ref.:
Giesbrecht, 1902 (p.42, Descr.F, figs.F); Wolfenden, 1911 (p.362); Farran, 1929 (p.210, 286); Hardy & Gunther, 1935 (1936) (p.191, Rem.); Wilson, 1942 a (p.198, fig.F); Vervoort, 1951 (p.150, Rem.); 1957 (p.147, Rem.); Tanaka, 1960 (p.68, Descr.M, figs.F,M); Fagetti, 1962 (p.43); Bradford, 1971 b (p.28) ; Heron, 1977 (p.70, figs.F); Björnberg & al., 1981 (p.667, F); Malt, 1982 (p.193); Razouls, 1994 (p.188, figs.F,M); Heron & Bradford-Grieve, 1995 (p.43, figs.F,M); Mazzocchi & al., 1995 (p.237, figs.F,M, Rem.); Menshenina & Melnikov, 1995 (p.129); Boxshall, 1998 (p.226); Schnack-Schiel & al., 1998 (p.173); Bradford-Grieve & al., 1999 (p.887, 971, figs.F,M)
Species Oncaea curvata - Plate 1 of morphological figuresIssued from: M.G. Mazzocchi, G. Zagami, A. Ianora, L. Guglielmo & J. Hure in Atlas of Marine Zooplankton Straits of Magellan. Copepods. L. Guglielmo & A. Ianora (Eds.), 1995. [238, Fig.3.44.1].
Female: A, habitus (dorsal); B, idem (lateral left side); C, urosome (dorsal); D, Mxp; E, P4.
Nota: Proportional lengths of prosome and urosome 63:37. Proportional lengths of urosomites and furca 5:45:10:9:15:16 = 100.

Male: F, habitus (dorsal); G, urosome (dorsal); H, Mxp.
Nota: Proportional lengths of urosomites and furca 7:51:5:4:4:13:16 = 100.


Species Oncaea curvata - Plate 2 of morphological figuresIssued from: M.G. Mazzocchi, G. Zagami, A. Ianora, L. Guglielmo & J. Hure in Atlas of Marine Zooplankton Straits of Magellan. Copepods. L. Guglielmo & A. Ianora (Eds.), 1995. [p.239, Fig.3.44.2].
Female (SEM preparation): B, pair of spermatophores attached to genital pores on dorsal side of genital somite; C, right P5 (arrow).
Bars: B, C 0.010 mm.


Species Oncaea curvata - Plate 3 of morphological figuresissued from : G.A. Heron in Antarct. Res. Ser. Washington, 1977, 26. [p.72, Fig.21, d-q].
Female (from SW Pacific-Antarctic area): d, habitus (lateral; scale bar: X); e, posterior of last prosomal segment and urosome (lateral; scale bar: Y); f, urosome (dorsal; scale bar: Y); g, right A2 (scale bar: Y); h, labrum (scale bar: Z); i, right Md (scale bar: Z); j, left Mx1 (scale bar: Z); k, right Mx2 (scale bar: Z); l, left Mxp (scale bar: Y); m-p, P1 to P4 (scale bar: Y); q, P5 (scale bar: Z).


Species Oncaea curvata - Plate 4 of morphological figuresissued from : W. Giesbrecht in Copepoden. Res. voyage du S. Y. Belgica. Rapports scientifiques, Zoologie, 1902. [Taf. XIII, 12-17].
Female (from Bellingshausen Sea): 12, habitus (dorsal); 13, anal segment and caudal ramus (dorsal); 14, A2; 15, endopod of P4; 16, habitus (lateral); 17, Mxp.


Species Oncaea curvata - Plate 5 of morphological figuresissued from : G.A. Heron & J.M. Bradford-Grieve in New Zealand Oceanogr. Inst. memoir 104. NIWA, 1995. [p.42, Fig.22].
Male (from 62°37'S, 169°51'E): a-b, habitus (lateral and dorsal, respectively) [r]; c, right Mxp [r]; d, P5 [u].

Scale in p.13, Fig.2. Letter in brackets.

Nota: Mxp lacking the small segment proximal to claw of female; 2nd segment with 2 proximal anterior semicircular rows of small setules; armament similar to that of O. conifera male.
Swimming legs as in female;
P5 similar to that of female, small and not delimited from body; 2 terminal setae about equal in length; seta on body near leg.
P6 represented by posterolateral flap on ventral seurface of genital segment.


Species Oncaea curvata - Plate 6 of morphological figuresIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXX, 1-6].
Female (from 66°59'S-67°04'S, 41°08'E-40°53'E): 1, habitus (dorsal); 2, head (lateral); 3, last thoracic segments and abdomen (lateral); 4, A2; 5, Mx2; 6, Mxp.
Figs.4-6 at the same scale.

Nota: Cephalothorax and abdomen in the proportional lengths 65 tlo 35.
Body transparent and soft-skined.
The lateral margin of the 4th thoracic segment narrowly rounded in lateral view, extends about to the middle of the 5th thoracic segment.
Abdominal segments and caudal rami in the proportional lengths 47 : 12 : 10 : 15 : 16 = 100.
Genital segment swollen laterally about the middle of the segment in dorsal view, about 1.2 times as long as broad.
Distal margin of the caudal ramus dilated when viewed from the lateral (fig.3).


Species Oncaea curvata - Plate 7 of morphological figuresIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXX, 7-11].
Female: 7, P1; 8, P2; 9, P3; 10, P4; 11, P5.
Figs.7-11 at the same scale.

Nota: 3rd endopodal segment of P4 slender and long, exceeding the distal end of the exopod; the distal spine of the same segment about as long as segment iyself.
P5 very small with 2 apical and 1 proximal setae.


Species Oncaea curvata - Plate 8 of morphological figuresIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [p. 68].
Female: Proportional lengths of the segments of A1.

Nota: A1 6-segmented, extends to the posterior end of the head.


Species Oncaea curvata - Plate 9 of morphological figuresIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXXI, 1-3].
Male (from 66°59'S-67°03'S, 41°08'E- 40°44'E): 1, habitus (dorsal); 2, last thoracic segments and abdomen (lateral); 3, forehead (lateral).
Figs. 2-3 at the same scale.

Nota: Cephalothorax and abdomen in the proportional lengths 67 to 33.
4th thoracic segment as in female.
Abdominal segments and caudal rami in the proportional length 58 : 4 : 3 : 4 : 15 : 16 = 100.
Genital segment elongate ovate in shape, about 1.6 times as long as broad; ventral surface slightly swollen.
Caudal rami 2.2 times as long as broad; distal end of ramus dilated in lateral view.
A1 5-segmented, distal three segments completely fused.

Compl. Ref.:
Sewell, 1948 (p.397, 570, 575); Fukuchi & Tanimura, 1981 (p.37); Hoshiai & Tanimura, 1981 (p.44); Hopkins, 1985 (p.197, Table 1, gut contents); Zmijewska, 1987 (tab.2a); Tucker & Burton, 1990 (p.591, tab.1, fig.5, seasonal, spatial variations); Eslake & al., 1991 (p.93, Table 1, 2, temporal changes); Conover & Huntley, 1991 (p.1, Table 3); Metz & Schnack-Schiel, 1995 (p.71, C content, predation) by carnivorus copepods; Metz, 1995 (p.190); 1996 (p.44, 72, 87); Knox & al., 1996 (tab.1); Errhif & al., 1997 (p.422); Swadling & al., 1997 (p.39, grazing); Atkinson, 1998 (p.289, Table 1, biological data); Elwers & Dahms, 1998 (p.150, 151, fig.1, 2, seasonal abundance); Schnack-Schiel & al., 1998 (p.173, abundance, sea ice); Metz, 1998 (p.229, food); Razouls & al., 2000 (p.343, tab. 3, 5, Appendix); Beaumont & al., 2001 (p.55); 2002 (p.133, tab.1); Bielecka & Zmijewska, 2005 (p.96); Deibel & Daly, 2007 (p.271, Table 6b, Rem.: Antarctic polynyas); Schnack-Schiel & al., 2008 (p.1056, Table 1, 4); Swadling & al., 2010 (p.887, abundance, indicator species); Yang & al., 2011 a (p.921, Table 2, as curvara, inter-annual variation 1999-2006); Thompson G.A. & al., 2012 (p.127, Table 2, 3)
NZ: 5 + 1 doubtful

Distribution map of Oncaea curvata by geographical zones
Species Oncaea curvata - Distribution map 3Issued from : K.M. Swadling, So. Kawaguchi & G.W. Hosie in Deep-Sea Research II, 2010, 57. [p.898, Fig.6 (continued)].
Distribution of indicator species Oncaea curvata from the BROKE-West survey (southwest Indian Ocean) during January-February 2006.
Sampling with a RMT1 net (mesh aperture: 315 µm), oblque tow from the surface to 200 m.
The survey area was located predominantly within the seasonal ice zone, and in the month prior to the survey there was considerable ice coverage over the western section but none over the east.

See map showing sampling sites in Calanus propinquus.
Loc:
Antarct. (Croker Passage, Drake Passage, King George Is., Potter Cove, Peninsula, Weddell Sea, Atlant. SW, SE, Syowa station, Indian, Fletcher Lake, Ellis fjord, Pacif. SW, SE, Ross Sea, Prydz Bay, McMurdo Sound, Bellinshausen Sea), sub-Antarct. (SW Atlant., Indian, SW Pacif.), Chile, Straits of Magellan, Argentina, Brazil, South Africa (Bay of Cape Town) (in Tanaka, 1964, p.14)
N: 54
Lg.:
(25) F: 0,79-0,62; M: 0,56-0,55; (31) F: 0,78; (33) F: 0,8-0,6; (36) F: 0,57-0,69; M: 0,53; (66) F: 0,75-0,59; M: 0,52-0,48; (102) F: 0,8; (114) F: 0,52; (679) F: 0,79-0,63; {F: 0,52-0,80; M: 0,48-0,56}
Rem.: Mesopelagic.
Sampling depth (Antarct., sub-Antarct.) : 0-1000 m.
Vervoort (1951) puts doubts on the identifications done by C. B. Wilson (1942 a, p.198) for the Pacific.
This form can reach the north of the Antarctic convergence (45° S, 87° E).
See remarks in Monothula subtilis Böttger-Schnack & Huys (2001, Rem.: p.478).
Last update : 17/04/2014
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