Species Card of Copepod
Calanoida ( Order )
    Calanoidea ( Superfamily )
        Paracalanidae ( Family )
            Calocalanus ( Genus )
Calocalanus equalicauda  (Bernard, 1958)   (F,M)
Syn.: Leptocalanus equalicauda Bernard, 1958 a (p.194, figs.F,M); 1960 (n°36, p.3, figs.F,M); Mazza, 1966 (p.69, as equicauda);
Ischnocalanus equalicauda Corral, 1972 (n°138, p.5, 6, fig.F,M, Rem: M juv ?); Vives & al., 1975 (p.35, tab.II, III, IV); Vives, 1982 (p.290); Lozano Soldevilla & al., 1988 (p.57).
Calocalanus equicauda : Mazzocchi & al., 2014 (p.64, Table 5, abundance)
Bradford-Grieve & al., 1999 (p.877, 909, figs.F,M); Vives & Shmeleva, 2007 (p.931, figs.F,M, Rem.)
Species Calocalanus equalicauda - Plate 1 of morphological figuresIssued from : M. Bernard in Bull. Soc. Zool. France, 1958, 83. [p.190, Pl III, c]. As Leptocalanus equalicauda.
Female (from Algiers Bay, Algeria): habitus.
Length: 1.600 mm.

Species Calocalanus equalicauda - Plate 2 of morphological figuresIssued from : M. Bernard in Bull. Soc. Zool. France, 1958, 83. [p.193, Pl. IV, c-e]. As Leptocalanus equalicauda.
Female: c, habitus (lateral); d, P5; e, P4.

Nota: Cephalon and 1st thoracic segment separate, 4th and 5th separated. Urosome 4-segmented, the 1st as long as wide. Spermathecae at the middle of the genital segment. Caudal rami short and square, with 3 strong setae plus 1 outer thin seta and 1 on the dorsal surface.

Species Calocalanus equalicauda - Plate 3 of morphological figuresIssued from : M. Bernard in Bull. Soc. Zool. France, 1958, 83. [p.190, Pl. IV, c]. As Leptocalanus equalicauda.
Male: a, habitus; b, P5; f, P4.

Nota: Closely resemble Calocalanus plumulosus but differs by the small size of the caudal rami. Urosome 4-segmented, the 2nd shorter than in C. plumulosus. Last segment of A1 equal 1 3/4 the preceeding. P5 with 4 segments and 2 short setae on the left leg, 3 segments on the right leg with 1 terminal seta as long as than the three segments and 2 short setae.

Compl. Ref.:
Kovalev & Schmeleva, 1982 (p.83); Hure & Krsinic,1998 (p.20, 100); Belmonte, 2018 (p.273, Table I: Italian zones)
NZ: 3

Distribution map of Calocalanus equalicauda by geographical zones
S Brazil, Canary Is., Mauritania, Bay of Biscay, SW Ireland, Ibero-moroccan Bay, Medit. (Alboran Sea, Baleares Sea, Algiers, S Adriatic Sea)
N: 6
(1131) F: 1,60; M: 0,954; (1132) F: 1,1; M: 1,0; {F: 1,10-1,60; M: 0,954-1,00}
Rem.: epi-mesopelagic.
Last update : 06/02/2020
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed March 03, 2024]

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