Species Card of Copepod
Cyclopoida ( Order )
    Corycaeidae ( Family )
        Corycaeus ( Genus )
            Corycaeus ( Sub-Genus )
Corycaeus (Corycaeus) clausi  F. Dahl, 1894   (F,M)
Syn.: Corycäus ovalis : Giesbrecht, 1892 (p.659, figs.F,M)
Corycaeus clausi : Bainbridge, 1972 (p.61, Appendix Table II: vertical distribution); Dessier, 1983 (p.89, Tableau 1, Rem., %); Boxshall & Halsey, 2004 (p.494); Avancini & al., 2006 (p.144, Pl. 112, figs.F,M, Rem.); Lan Y.-C. & al., 2009 (p.1, Table 2, % vs hydrogaphic conditions); Vives & Shmeleva, 2010 (p.204, figs.F,M, Rem.); Isari & al., 2011 (p.51, Table 2, abundance vs distribution); Belmonte & al., 2013 (p.222, Table 2, abundance vs stations);
Ref.:
F. Dahl, 1894 (p.73); M. Dahl, 1912 (p.18, figs.F,M); Pesta, 1920 (p.647, fig.F); Farran, 1929 (p.211, 291, fig.F); Klevenhusen, 1933 (p.590, figs.F, Rem.); 1933 a (p.85, carte 38); Rose, 1933 a (p.327, figs.F,M); Dakin & Colefax, 1933 (p.209); 1940 (p.111, figs.F); Wilson, 1942 a (p.180, fig.F); Lysholm & al., 1945 (p.44); Sewell, 1947 (Rem.: p.274); Tanaka, 1957 (p.79, figs.F,M); Cervigon, 1964 (p.167, figs.F,M); Owre & Foyo, 1967 (p.120, figs.F,M); Vilela, 1968 (p.35, figs.F); Corral Estrada, 1970 (p.236, Rem.); Razouls, 1972 (p.95, Annexe: p.128, figs.F,M); 1974 c (1975) (p.85, figs.F,M); Corral Estrada & Pereiro Muñoz, 1974 (tab.I);; Lakkis & Zeidane, 1987 (p.18, figs.F,M, Rem.); Chihara & Murano, 1997 (p.966, Pl.218: F,M); Boxshall, 1998 (p.221); Bradford-Grieve & al., 1999 (p.888, 974, figs.F,M); Fuentes-Reinés & Suarez-Morales, 2015 (p.369, Table 1, Rem.: p.382, figs.F)
Species Corycaeus (Corycaeus) clausi - Plate 1 of morphological figuresissued from : O. Tanaka in J. Fac. Agricult. Kyushu Univ., 1957, 11 (1). [Pl.3, Figs.7-11].
Female (from Japanese waters): 7, habitus (dorsal); 8, urosome (lateral left side); 9, A2; 10, P4.
Nota: Head and 1st thoracic segment fused. Anterior segment about 1.6 times as long as wide. The abdominal segments and furca in the proportional lengths 46:22:32. Genital segment oval as wide as long (22:23). Anal segment wider at the proximal than at the distal (15:11). Furcal rami more than 3 times as long as it is wide at the proximal. Posterior corners of 3rd thoracic segment extend to 2/3 of the genital segment.

Male: 11, habitus (dorsal).
Nota: The abdominal segments and furca in the proportional lengths 46:21:33. Genital segment about 2 times as long as wide (7:4). Furcal rami about 7 times as long as it is wide at the proximal (20:3).


Species Corycaeus (Corycaeus) clausi - Plate 2 of morphological figuresissued from : C. Razouls in Vie Milieu, 1974, 24 (1.A). [p.99, Fig.1].
Female (from W Medit.:Banyuls, France): A, 5th troracic segment and urosome (dorsal); B-B', A2.


Species Corycaeus (Corycaeus) clausi - Plate 3 of morphological figuresissued from : C. Razouls in Vie Milieu, 1974, 24 (1.A). [p.100, Fig.2].
Male: A, 5th toracic segment and urosome (dorsal); B-B', A2, C, P4.


Species Corycaeus (Corycaeus) clausi - Plate 4 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.II, Figs.5-8].
Female: 5, habitus (dorsal); 6, idem (lateral right side); 7, A2; 8, P4.


Species Corycaeus (Corycaeus) clausi - Plate 5 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.II, Figs.9-12].
Male: 9, habitus (dorsal); 10, idem (lateral right side); 11, A2; 12, P1.


Species Corycaeus (Corycaeus) clausi - Plate 6 of morphological figuresissued from : F. Cervigon iin Mem. Soc. Cienc. nat. La Salle, 1964, 24 (68). [p.168, Lam.3]. As Corycaeus clausi.
Female (from Venezuela): 1, habitus (dorsal); 2, abdomen (dorsal); 2, A2; 4, distal part of A2; 5, P4.
Nota: lengths ratio genital, anal segments and ciudal rai 49:22:29 and 48:20:32.


Species Corycaeus (Corycaeus) clausi - Plate 7 of morphological figuresissued from : F. Cervigon iin Mem. Soc. Cienc. nat. La Salle, 1964, 24 (68). [p.169, Lam.4]. As Corycaeus clausi.
Male: 1, prosome (dorsal); 2, habitus (lateral); 3-4, abdomen (lateral and doral, respectively); 5, A2; 6, P4.

Nota: Lengths ratio genital , anal segments and caudal rami 46:21:33; 45:24:31 and 44:24:32.


Species Corycaeus (Corycaeus) clausi - Plate 8 of morphological figures[O & F]
Female: Caudal rami approimately 2/3 the length of the genital segment + anal segment.
Male: Caudal rami approximately 1/2 the length of the urosome.

[B. & H] Female: Anal somite just longer than wide, at most 1.25 times longer in male. Genital double-somite not projecting over anal somite (in lateral view).
Male: Caudal rami 75 % as long as genital somite.

[V & S] Female: Caudal rami length less than the abdominal segments (rapport ± 0.8/12). A2 without longitudinal line of spines. Genital segment in regular form, without prominence in dorsal view.
Male: Caudal rami length less than the abdominal segments (rapport ± 0.9/14). Anal segment 1.5 times longer than broad. Points of the 3rd thoracic segment exceed 2/3 the genital segment.


Species Corycaeus (Corycaeus) clausi - Plate 9 of morphological figuresIssued from : J.M. Fuentes-Reinés & E. Suarez-Morales in Bol. Invest. Mar. Cost., Santa Marta, Colombia, 44 (2) [p.383, Fig.4].Corycaeus (Corycaeus) clausi Female (from laguna Navio Quebrado, Colombia): a, habitus; b, A2; c, P4; d, urosome and caudal rami.

Compl. Ref.:
Massuti Alzamora, 1942 (p.105, Rem.); Sewell, 1948 (p.393, 406, 451, Rem.); C.B. Wilson, 1950 (p.193); Fagetti, 1962 (p.51); V.N. Greze, 1963 a (tabl.2); Shmeleva, 1963 (p.141); Duran, 1963 (p.26); Björnberg, 1963 (p.85, Rem.); De Decker & Mombeck, 1964 (p.12); Pavlova, 1964 (p.1711); Shmeleva, 1965 b (p.1350, lengths-volume-weight relation); Pavlova, 1966 (p.45); Furuhashi, 1966 a (p.295, vertical distribution in Kuroshio region, Table 10); Mazza, 1966 (p.74); 1967 (p.367); Ehrhardt, 1967 (p.744, geographic distribution, Rem.); Evans, 1968 (p.12); Dowidar & El-Maghraby, 1970 (p.268); Deevey, 1971 (p.224); Binet & al., 1972 (p.71); Apostolopoulou, 1972 (p.329, 381); Björnberg, 1973 (p.368, 385); Guglielmo, 1973 (p.399); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Dessier, 1979 (p.208); Vaissière & Séguin, 1980 (p.23, tab.1); Vives, 1982 (p.296); Kovalev & Shmeleva, 1982 (p.86); Scotto di Carlo & al., 1984 (p.1043); Tremblay & Anderson, 1984 (p.7, Rem.); Regner, 1985 (p.11, Rem.: p.42); Moraitou-Apostolopoulou, 1985 (p.303, occurrence/abundance in E Mediterranean Sea, Rem.: p.310); Jansa, 1985 (p.108, Tabl.I, II, III, IV, V); Brinton & al., 1986 (p.228, Table 1); Jimenez-Perez & Lara-Lara, 1988; Lozano Soldevilla & al., 1988 (p.61); Webber & Roff, 1995 (tab.1); Shih & Young, 1995 (p.76); Suarez-Morales & Gasca, 1997 (p.1525); Böttger-Schnack, 1997 (p.409); Hure & Krsinic, 1998 (p.89, 105); Alvarez-Cadena & al., 1998 (t.1,2,3,4); Suarez-Morales & Gasca, 1998 a (p.112); Lapernat, 1999 (p.33); Siokou-Frangou, 1999 (p.479); Lavaniegos & Gonzalez-Navarro, 1999 (p.239, Appx.1); Dolganova & al., 1999 (p.13, tab.1); Lapernat, 2000 (tabl.3, 4); Suarez-Morales & Gasca, 2000 (1247, tab.1); Seridji & Hafferssas, 2000 (tab.1); Lopez-Salgado & al., 2000 (tab.1); Lapernat & Razouls, 2001 (tab.1); Zerouali & Melhaoui, 2002 (p.91, Tableau I); Vukanic, 2003 (p.139, tab.1); Daly Yahia & al., 2004 (p.366, fig.4); Lan & al., 2004 (p.332, tab.1); Isari & al., 2006 (p.241, tab.II); Marques & al., 2006 (p.297, tab.III); Mageed, 2006 (p.168, Table 4); Lavaniegos & Jiménez-Pérez, 2006 (p.140, tab.2, Rem.); Zervoudaki & al., 2006 (p.149, Table I); Khelifi-Touhami & al., 2007 (p.327, Table 1); Zakaria & al., 2007 (p.52, Table 1, vs Salinity, p.59: Rem.); Marques S.C. & al., 2007 (p.725, Table 1, fig.4, climate variability); McKinnon & al., 2008 (p.848: Tab. IV); McKinnon & al., 2008 (p.843: Tab.1); Lan Y.-C. & al., 2008 (p.61, Table 1, % vs stations);C.-Y. Lee & al., 2009 (p.151, Tab.2); Vidjak & Bojanic, 2009 (p.432, Table II, IV, V); Brugnano & al., 2010 (p.312, Table 2, 3); Drira & al., 2010 (p.145, Tanl.2); Williamson & McGowan, 2010 (p.273, Table 3, Pacific central gyres: N and S); Mazzocchi & Di Capua, 2010 (p.428); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2); Hsiao S.H. & al., 2011 (p.475, Appendix I); Selifonova, 2011 a (p.77, Table 1, alien species in Black Sea); Tutasi & al., 2011 (p.791, Table 2, abundance distribution vs La Niña event); Shiganova & al., 2012 (p.61, Table 4); Salah S. & al., 2012 (p.155, Tableau 1); Uysal & Shmeleva, 2012 (p.909, Table I); Brugnano & al., 2012 (p.207, Table 3); Rekik & al., 2012 (p.336, Table 1, abundabce); Lidvanov & al., 2013 (p.290, Table 2, % composition); Marquez-Rojas & al., 2014 (p.5, Rem., %); Zaafa & al., 2014 (p.67, Table I, occurrence); Benedetti & al., 2016 (p.159, Table I, fig.1, functional characters); Ben Ltaief & al., 2017 (p.1, Table III, Summer relative abundance); Marques-Rojas & Zoppi de Roa, 2017 (p.495, Table 1); Benedetti & al., 2018 (p.1, Fig.2: ecological functional group); Chaouadi & Hafferssas, 2018 (p.913, Table II: occurrence); Palomares-Garcia & al., 2018 (p.178, Table 1: occurrence)
NZ: 15

Distribution map of Corycaeus (Corycaeus) clausi by geographical zones
Species Corycaeus (Corycaeus) clausi - Distribution map 3issued from : A.A. Shmeleva in Bull. Inst. Oceanogr., Monaco, 1965, 65 (n°1351). [Table 6: 45]. Corycaeus clausi (from South Adriatic).
Dimensions, volume and Weight wet. Means for 50-60 specimens. Volume and weight calculated by geometrical method. Assumed that the specific gravity of the Copepod body is equal to 1, then the volume will correspond to the weight.
Loc:
South Africa (E), Congo, G. of Lagos, Ivorian shelf, Dakar, Cape Verde Is., off NW Cape Verde Is., off Morocco-Mauritania, Cap Ghir, Canary Is., off Madeira, Portugal, Mondego estuary, Patagonia, S Brazil, off N Trindade, Barbada Is., Venezuela, Bahia de Mochima & Cariaco Gulf (Venezuela), Caribbean Sea, Jamaica, Caribbean Colombia, Colombia (Laguna Navio Quebrado), Yucatan, G. of Mexico, Cuba, Florida, Sargasso Sea, off Bermuda (Station "S"), off New-York, off E Nova Scotia, Flemish Cap, off W Azores, off W Tangier, Medit. (Alboran Sea, Sidi Fredj coast, Gulf of Annaba, Castellon, Baleares, Banyuls, G. of Lion, Ligurian Sea, Tyrrhenian Sea, Milazzo, Strait of Messina, G. of Gabes, Gulf of Taranto, Malta, Adriatic Sea, Sfax, G. of Gabès, Ionian Sea, Aegean Sea, Thracian Sea, Black Sea, Lebanon Basin, Alexandria, Bardawill Lagoon), SW Indian, China Seas (East China Sea), Taiwan Strait, Taiwan (E, NW), Japan, Japan Sea, Bikini, Kamtchatka, Pacif. (equatorial E & W), California, W BaJa California, La Paz, Gulf of California, W Mexico, Pacific (central gyres: N and S), Australia (New South Wales, North West Cape), Fiji Is., Galapagos-Ecuador, N Chile
N: 135
Lg.:
(35) F: 1,74-1,5; M: 1,44; (104) F: 1,8; (107) F: 1,5; M: 1,37; (180) F: 1,77-1,6; M: 1,4-1,34; (237) F: 1,7; (327) F: 1,82-1,74; M: 1,56-1,49; (340) F: 1,7; 1,6; M: 1,3; (449) F: 1,57; M: 1,35; (666) F: 1,566; M: 1,35; (668) F: 1,6-1,57; M: 1,36-1,33; (670) F: 1,78-1,55; M: 1,4-1,36; (920) F: 1,58; (1312) F: 1,65; {F: 1,50-1,82; M: 1,30-1,56}
Rem.: epi-mesopelagic, (off Malta: 2000 m). Overall Depth Range in Sargasso Sea: 0-500 m (Deevey & Brooks, 1977, Station "S"). 0-97 m at Station N-1 (SW Bösö, E middlel Japan) from Furuhashi (1966 a).
For Sewell (1947) this species would only be a variety of C. crassiusculus.
For Corral Estrada (1970, p.218), the abdominal segments and furca in the proportional lengths 44-47 : 25-27 : 27-30 = 100.
After Benedetti & al. (2018, p.1, Fig.2) this species belonging to the functional group 2 corresponding to small ambush feeding carnivorous.
For Boxshall & Halsey (2004, p.491) the subgenus (Dahl, 1912) is considered as full generic status pending phylogenetic revision of the whole family at the generic level.
Last update : 04/12/2020
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed September 19, 2021]

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