Species Card of Copepod
Calanoida ( Order )
    Metridinidae ( Family )
        Metridia ( Genus )
Metridia curticauda  Giesbrecht, 1889   (F,M)
Syn.: no Sars, 1920 c (p.10)
Ref.:
Giesbrecht, 1892 (p.340, 346, 773, Descr.F, figs.F); Giesbrecht & Schmeil, 1898 (p.108, Rem. F); Wolfenden, 1911 (p.286); Farran, 1929 (p.209, 259); Sewell, 1932 (p.248); Brodsky, 1950 (1967) (p.297, figs.F,M); Vervoort, 1951 (p.121, figs.F,M, Rem.); 1957 (p.123, Rem.); Tanaka, 1963 (p.15, figs.F,M); Vaupel-Klein, 1970 (p.4, 33); Minoda, 1971 (p.36); Bradford, 1971 b (p.23, figs.F,M, Rem.); Gardner & Szabo, 1982 (p.322, figs.F,M); Szabo & Gardner, 1986 (p.1560: Appendix, Rem.); Razouls, 1994 (p.138, figs.F,M); Chihara & Murano, 1997 (p.837, tab.6); Hure & Krsinic, 1998 (p.61, 101); Bradford-Grieve & al., 1999 (p.884, 948, figs.F,M); Bradford-Grieve,1999 b (p.113, figs.F,M, Rem., figs.178, 192); Vives & Shmeleva, 2007 (p.371, figs.F,M, Rem.); Takenaka & al., 2013 (p.201, DNA sequences vs luciferase)
Species Metridia curticauda - Plate 1 of morphological figuresissued from : Tanaka O. in Publs Seto Mar. Biol. Lab., 1963, XI (1). [p.16, Fig.154].
Female: a, habitus (dorsal); b, forehead (left lateral side); c, last thoracic segment and genital somite (left lateral side); d, last thoracic segment and urosome (dorsal); e, 1st segment of endopodite of P2; f, P5.

Male: g, P5.


Species Metridia curticauda - Plate 2 of morphological figuresissued from : J.M. Bradford-Grieve in The Marine Fauna of New Zealand: Pelagic Calanoid Copepoda. National Institute of Water and Atmospheric Research (NIWA). NIWA Biodiversity Memoir, 111, 1999. [p.114, Fig.76].
Female (34°32.5'S, 157°31.5'E): A, habitus (lateral left side); B, P5.


Species Metridia curticauda - Plate 3 of morphological figuresIssued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.297, Fig.203].
Female (from NW Pacif.): habitus (dorsal and lateral left side); S2En1, hooks on endopodal segment 1 of P2; S5, P5, P5.

Male: habitus (dorsal and lateral left side); S5, P5; S5Le, P5 (Le = left leg).


Species Metridia curticauda - Plate 4 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.122, Fig.65].
Female (from ± 66°.5S, 11°W): habitus (lateral).

Nota: Head and 1st thoracic somite separated, 4th and 5th fused. Postero-lateral margin of the last thoracic somite is not smoothly rounded, but produced into a minor knob, distinctly visible in dorsal and lateral views. A1 reaching the middle of the abdomen (or even slightly longer); the 8th-9th segments completely fused and these segments partly fused with the 10th.


Species Metridia curticauda - Plate 5 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.123, Fig.66].
Female: a, urosome (dorsal); b, right P4 (anterior); c, P5 (anterior).

Nota: Genital segment formed by fusion of the first 3 urosomal somites, slightly longer than the combined length of the intermediate abdominal segment and anal segment, which two segments have the same length. Caudal rami slightly longer than the anal segment and about twice as long as wide. Exopod of P4 with very short endspine (exactly 1/3 the length of the 3rd exopodal segment); in this respect the females, here, differ from Gisebrecht's account.


Species Metridia curticauda - Plate 6 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.124, Fig.67].
Male: a, habitus (lateral); b, P5 (anterior; lt = left foot, rt = right foot).

Nota: The males, found in company of the females, strickling resemble the female in external appearance. Clasping A1 on the left side; 21-segmented; right A1 as in female. Mouth parts not reduced. P1 to P4 as in female. P5 resemble those of M. brevicauda, but differ in the proportional length of the segments and other details.


Species Metridia curticauda - Plate 7 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.33, Fig.33].
Female: 33, habitus (dorsal).


Species Metridia curticauda - Plate 8 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.33, Figs.4, 15].
Female: 4, A1 (proximal segments); 15, P5.


Species Metridia curticauda - Plate 9 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.32, Fig.7].
Female: 7, exopodal segment 1 of P2 (anterior view).


Species Metridia curticauda - Plate 10 of morphological figuresIssued from : J.M. Bradford in N.Z. Oceanogr. Inst., 1971, 206, Part 8, No 59. [p.22, Fig.84].
Female (from Ross Sea): 84, P5.
Scale bar: 100 µm.

Nota: P5 bears small external spines on all three segments, whereas Vervoort (1951) does not figure the terminal segment spine and Giesbrecht does not figure the penultimate segment spine.


Species Metridia curticauda - Plate 11 of morphological figuresIssued from : J.M. Bradford in N.Z. Oceanogr. Inst., 1971, 206, Part 8, No 59. [p.22, Fig.85].
Male (from Ross Sea): 85, P5.
Scale bar: 100 µm.

Nota: P5 has more spines on various segments than Vervoort's (1951) figures, but the Ross Sea specimens agree with those figured by Tanaka (1963) from deep water off the Izu region (Japan).


Species Metridia curticauda - Plate 12 of morphological figuresIssued from : C. Razouls in Ann. Inst. océanogr., Paris, 1994, 70 (1). [p.138]. Caractéristiques morphologiques de Metridia curticauda femelle et mâle adultes.
Terminologie et abbréviations: voir à Calanus propinquus.

Compl. Ref.:
Wilson, 1942 a (p.194); Lysholm & al., 1945 (p.32); Sewell, 1948 (p.349, 502, 557, 567, 570, 573, 574); C.B. Wilson, 1950 (p.264); Furuhashi, 1966 a (p.295, vertical distribution in Oyashio/Kuroshio regions, Table 6, 8, 9, 10); Park, 1970 (p.477); Roe, 1972 (p.277, tabl.1, tabl.2); 1972 b (p.543); Björnberg, 1973 (p.337, 387); Deevey & Brooks, 1977 (p.256, tab.2, Station "S"); Kovalev Shmeleva, 1982 (p.84); Vives, 1982 (p.293); Hopkins, 1985 (p.197, Table 1, gut contents); Brinton & al., 1986 (p.228, Table 1); Zmijewska, 1987 (tab.2a); Hopkins & Torres, 1988 (tab.1); Hattori, 1991 (tab.1, Appendix); Ward & al., 1995 (p.195, Table 2); Errhif & al., 1997 (p.422); Suarez-Morales & Gasca, 1998 a (p.110); Voronina & Kolosova, 1999 (p.71); Atkinson & Sinclair, 2000 (p.46, 50, 51, 54, 55, zonal distribution); Lapernat, 2000 (tabl. 3, 4); Razouls & al., 2000 (p.343, tab. 5, Appendix); Ward & Shreeve, 2001 (p.50, tab.3); Yamaguchi & al., 2002 (p.1007, tab.1); Kahle & Zauke, 2003 (p.409, metals concentration); Yamaguchi & al., 2004 (p.480, tab.2); Hsiao & al., 2004 (p.326, tab.1); Ikeda & al., 2006 (p.1791,Table 2); Schnack-Schiel & al., 2008 (p.1045: Tab.2; Fernandes, 2008 (p.465, Tabl.2); Gaard & al., 2008 (p.59, Table 1, N Mid-Atlantic Ridge); Galbraith, 2009 (pers. comm.); Park & Ferrari, 2009 (p.143, Table 4, Appendix 1, biogeography); Homma & Yamaguchi, 2010 (p.965, Table 2); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2); Hsiao & al., 2010 (p.179, Table III, trace metal concentration); Homma & al., 2011 (p.29, Table 2, 3, 5, abundance, feeding pattern: suspension feeders); Michels & al., 2012 (p.369, Table 1, occurrence frequency); Ward & al., 2014 (p.305, Table 6, 7, seasonal and abundance in the ''Discovery'' Investigations in the 1930s); Belmonte, 2018 (p.273, Table I: Italian zones)
NZ: 18

Distribution map of Metridia curticauda by geographical zones
Species Metridia curticauda - Distribution map 4Issued from : A. Atkinson & J.D. Sinclair in Polar Biol., 2000, 23. [p.50, Fig.3]
Metridia curticauda from Scotia Sea.
Median and interquartile ranges of copepods (nos /m2) in the five water zones; from north to south these are SAF Subantractic Front area, PFZ Polar frontal Zone, PF Polar Front area, AZ Antarctic Zone, WSC Weddell-Scotia Confluence area/ East Wind Drift.
Numbers on the plots are upper interquartiles where these could not be scaled.
Species Metridia curticauda - Distribution map 5Issued from : P. Ward, A. Atkinson, A.W.A. Murray, A.G. Wood, R. Williams & S. Poulet in Polar Biol., 1995, 15. [p.202, Fig.4, B].
Abundance (10/m3) and biomass (g dry mass/m3) profiles at the oceanic station from the shelf break in water 4000 m deep off Bird Island, South Georgia (53°04'S, 39°51'W) in January 1990.
Values on the horizontal axes at the base of each profile represent abundance and the one above biomass. Solid line = midday haul; hatched line = midnight haul.
Species Metridia curticauda - Distribution map 6Issued from : P. Ward, A. Atkinson, A.W.A. Murray, A.G. Wood, R. Williams & S. Poulet in Polar Biol., 1995, 15. [p.198, Fig.1, B (modified C.R.)].
Profile temperature-depth at the oceanic stations from the shelf break in water 4000 m deep off Bird Island, South Georgia, in January 1990.
Loc:
Antarct. (Peninsula, Drake Passage, Weddell Sea, SW & SE Atlant., Scotia Sea, Weddell Sea, Indian, SW & SE Pacif., Ross Sea), South Georgia, sub-Antarct. (Indian, SW Pacif.), S South Africa, off Tristan da Cunha, off Ascension Is., off Cape Verde Is., off Mauritania - NW Cape Verde Is., Canary Is., off Azores, Caribbean Sea, Caribbean Colombia, G. of Mexico, off Bermuda: Station ‘’ S’’ (32°10’N, 64°30’W), Sargasso Sea, SW Ireland, off W Norway, Medit. (S Adriatic Sea: in Grandori, 1913), Indian N, Bay of Bengal, Sulu Sea, China Seas (South China Sea), Taiwan E, Japan, off Sanriku, off SE Kuril Is., Station Knot, Bering Sea, S Aleutian Basin, S Aleutian Is., Station "P", off British Columbia, Gulf of California, off NE Marquesas Is., off Peru, Galapagos, Chile, New Zealand, Tasman Sea, S Tasmania
N: 61
Lg.:
(22) F: 3,6-2,52; M: 3,1-2; (25) F: 3,2-2,25; M: 2,3-1,8; (26) F: 3,57; M: 3,12; (31) F: 3,25-2,65; M: 2,13-2; (35) F: 3-2,52; M: 2,28-1,92; (46) F: 3,6-2,7; (102) F: 2,5-2,4; M: 2,1; 2; (199) F: 3,12-2,81; M: 2,68-2,58; (208) F: 3,8-3,2; M: 3,3-3,1; (909) F: 2,5-3,15; M: 2,8; {F: 2,25-3,80; M: 1,80-3,30}

The mean female size is 2.965 mm (n = 19; SD = 0.4698), and the mean male size is 2.450 mm (n = 16; SD = 0.5031). The size ratio (male : female) is 0.84 (n = 9; SD = 0.0881).
Rem.: meso-abyssopelagic.
Sampling depth (Antarct., sub-Antarct.) : 200-1000 m. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, Station "S"); 495-1646 m at Station S1 (SE Hokkaido) in the Oyashio region.
According to Vervoort (1951, p.121) the male, unknown to Giesbrecht, is mentioned by Farran and Lysholm & al., but it is still undescribed. The female, which is not so easily distinguished from M. lucens, differs by the shape of the last thoracic segment; the proportional length of the urosomal segments and the caudal rami, the structure of P5 and the length of the enspine of the exopod of P4.
For Bradford-Grieve (1999 b, p.113) the Southwest Pacific specimens appear to differ slightly from the Vervoort's description because the "minor" knob on the posterior metasomal corners inconspicuous, and no outer distal spine was observed on the 3rd segment of the female P5.
For Bradford '1971 b, p.24) the species seems to inhabit both the Deep Warm Water and Antarctic Bottom Water (Vervoort, 1965), hence its wide distiburion.
Last update : 07/12/2020
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