Species Card of Copepod
Cyclopoida ( Order )
    Corycaeidae ( Family )
        Corycaeus ( Genus )
            Ditrichocorycaeus ( Sub-Genus )
Corycaeus (Ditrichocorycaeus) amazonicus  F. Dahl, 1894   (F,M)
Syn.: no Corycaeus amazonicus : Wolfenden, 1905 (1906) (p.1029);
Ditrichococorycaeus amazonicus : Boxshall & Halsey, 2004 (p.495); Miyashita & al., 2009 (p.815, Tabl.II); Miyashita & al., 2012 (p.1557, Table 2: occurrence); Lopez-Ibarra & al., 2014 (p.453, fig.6, biogeographical affinity); Acha & al., 2020 (p.p.1, Table 3: occurrence % vs ecoregions, Table 5: indicator ecoregions).
Ref.:
F. Dahl, 1894 (p.71); M. Dahl, 1912 (p.69, figs.F,M); Farran, 1929 (p.211, 296); Klevenhusen, 1933 a (p.92, chart 38); Cervigon, 1964 (p.192, figs.F,M); Gonzalez & Bowman, 1965 (p.266, figs.F,M, Rem.); Ramirez, 1969 (p.96, figs.F,M, Rem.); Björnberg, 1972 (figs.,N); Dawson & Knatz, 1980 (p.10, figs.F,M); Björnberg & al., 1981 (p.676, figs.F,M); Sazhina, 1985 (p.95, figs.N); Bowxshall, 1998 (p.223); Bradford-Grieve & al., 1999 (p.888, 974, figs.F,M);
Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 1 of morphological figuresissued from : F.C. Ramirez in Contr. Inst. Biol. mar., Buenos Aires, 1969, 98. [p.94, Lam. XIX, figs. 160, 162].
Female (from off Mar del Plata): 160, habitus (dorsal).

Male: 162, habitus (dorsal).
Scale bars in mm: 0.3 (160, 162).


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 2 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.X, Figs.1, 2, 3].
Female: 1, habitus (dorsal); 2, urosome (ventral); 3, habitus (lateral right side).


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 3 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.X, Fig.6].
Female: 6, A2.


Species Corycaeus (Ditrichocorycaeus) amazonicus - 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.X, Figs.8, 9].
Female: 8, P4; 9, P2 (d-terminal part of exopod)


Species Corycaeus (Ditrichocorycaeus) amazonicus - 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.X, Figs.4, 5].
Male: 4,habitus (dorsal); 5, idem (lateral left side).


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 6 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.X, Fig.7].
Male: A2.


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 7 of morphological figuresissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.X, Fig.10].
Male: 10, P1 (terùinal part of exopod).


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 8 of morphological figuresissued from : F. Cervigon iin Mem. Soc. Cienc. nat. La Salle, 1964, 24 (68). [p.193, Lam.20]. As Ditrichocorycaeus amazonicus.
Female (from Venezuela): 1-2, habitus (dorsal and lateral, respectively); 3, A2; 4, P4.

Nota: Length prosome: 0.63-0.66; length urosome: 0.34-0.38. Lengths ratio genital , anal segments and caudal rami 35:29:35; 35:27:38 and 34:26:40.


Species Corycaeus (Ditrichocorycaeus) amazonicus - Plate 9 of morphological figuresissued from : F. Cervigon iin Mem. Soc. Cienc. nat. La Salle, 1964, 24 (68). [p.194, Lam.22]. As Ditrichocorycaeus amazonicus.
Male: 1, habitus (dorsal); 2, abdomen (lateral); 3, A2; 4, P4.

Nota: Length prosome: 0.48-0.50; length urosome: 0.33-0.37. Lengths ratio genital , anal segments and caudal rami 46:26:28; 43:24:32 and 41:28:31.

Compl. Ref.:
Grice, 1956 (p.53); Deevey, 1960 (p.5, Table II, annual abundance); Björnberg, 1963 (p.83, Rem.); Peterson & Miller, 1976 (p.14, Table 1, 3, abundance vs interannual variations); 1977 (p.717, Table 1, seasonal occurrence); Turner & al., 1984 (p.191, feeding); Turner, 1986 (p.289, fig. 7: pellet-content): Santos & Ramirez, 1991 (p.79); Lindo, 1991 (tab.3); Suarez Morales, 1994 b (tab.1); Lopes, 1994 (tab.1); Palomares Garcia & Vera, 1995 (tab.1); Webber & al., 1996 (tab.1); Suarez-Morales & Gasca, 1997 (p.1525); Lopes & al., 1998 (p.195, tab.2); Alvarez-Cadena & al., 1998 (t.1,2,3,4); Hopcroft & Roff, 1996 (p.789, diel egg production); Hopcroft & al., 1998 (tab.2); Suarez-Morales & Gasca, 1998 a (p.112); Lavaniegos & Gonzalez-Navarro, 1999 (p.239, Appx.1); Lopes & al., 1999 (p.215, tab.1); Lopez-Salgado & al., 2000 (tab.1); Dunbar & Webber, 2003 (tab.1); Choi & al., 2005 (p.710: Tab.III); Lavaniegos & Jiménez-Pérez, 2006 (p.140, tab.2, Rem.); Sterza & Fernades, 2006 (p.95, Table 1, occurrence); Lopez Ibarra, 2008 (p.1, Table 1, fig.11); Hernandez-Trujillo & al., 2010 (p.913, Table 2); Hidalgo & al., 2010 (p.2089, Table 2); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2); Lavaniegos & al., 2012 (p. 11, Table 1, fig.3, seasonal abundance, Appendix); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.); Melo Jùnior & al., 2013 (p.363, Table 2, egg production); Fierro Gonzalvez, 2014 (p.1, Tab. 3, 5, occurrence, abundance); Marquez-Rojas & al., 2014 (p.6, Rem., %); Ben Ltaief & al., 2017 (p.1, Table III, Summer relative abundance); Atique & al., 2017 (p.1, Table 1); Palomares-Garcia & al., 2018 (p.178, Table 1: occurrence)
NZ: 5

Distribution map of Corycaeus (Ditrichocorycaeus) amazonicus by geographical zones
Loc:
off Mar del Plata, Rio de la Plata, Brazil (S, Guarau, Paranagua estuary, Rio de Janeiro, Vitoria Bay, Caeté Estuary, Amazon mouths), G. of Mexico, off W Mississipi River mouth, Caribbean Sea, Caribbean Colombia, Venezuela (Cariaco Gulf), Guajira, Yucatan (Chetumal Bay), Porto Rico, Jamaica (Kingston Harbour), Yucatan, Florida, off Beaufort Inlet, Delaware Bay (outside), E Medit. (G. of Gabes), Oregon (off Newport); California (San Pedro Bay: in Dawson & Knatz, 1980), W Baja California (Bahia Magdalena), La Paz, G. of California, Chile (N-S)
N: 47
Lg.:
(35) F: 1,02; (237) F: 0,9; M: 0,82; (254) F: 0,9; M: 0,85; (666) F: 1,04; M: 0,84; (668) F: 1,04-0,98; M: 0,87-0,81; {F: 0,90-1,04; M: 0,81-0,87}
Rem.: Coastal. Tropical affinity
After Björnberg (1963, p.83) in Brazilian waters this species occurs sparingly in the samples where C. giesbrechti is very numerous. The greatest percentage of the species occurred in waters where the salinity was under 34.00 p.1000.
Observed in the ballast of ships in San Francisco.
First occurrence in Chilean waters by Hidalgo & al. (2010).
Ben Ltaief & al. (2017 (p.11, Table III) note the first record of this species in the Mediterranean Sea (Tunisia: Gulf of Gabes).
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 : 12/02/2021
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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 22, 2021]

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