Species Card of Copepod
Calanoida ( Order )
    Metridinidae ( Family )
        Metridia ( Genus )
Metridia effusa  Grice & Hulsemann, 1967   (F,M)
Grice & Hulsemann, 1967 (p.17, 28, figs.F,M); Vives & Shmeleva, 2007 (p.372, figs.F,M, Rem.); Blanco-Bercial & al., 2011 (p.103, Table 1, Biol. mol, phylogeny)
Species Metridia effusa - Plate 1 of morphological figuresissued from : G.D. Grice & K. Huisemann in Proc. U.S. natn. Mus., 1967, 122 (3583). [p.55, Fig.139; p.56, Figs.140-143].
Male (from Indian Ocean): 139, habitus (lateral right side); 140, 4th and 5th thoracic segments and urosome (dorsal); 141, forehead (dorsal); 142, right P5; 143, left P5.

Nota: Head and 1st thoracic segment fused, 4th and 5th fused. Forehead with rounded knob.

Species Metridia effusa - Plate 2 of morphological figuresissued from : G.D. Grice & K. Huisemann in Proc. U.S. natn. Mus., 1967, 122 (3583). [p.55, Figs.134-138].
Female: 134, habitus (dorsal); 135, idem (lateral left side); 136, forehead (lateral); 137, proximal part of A1; 138, P5.

Nota: Head and 1st thoracic segment incompletely separate, 4th and 5th fused. Forehead pointed. Furca longer than wide. A1 reaches genital segment, 1st and 2nd segments with proeminent teeth. P5: 3-segmented with extremely small distal segment bearing a long seta, penultimate segment with small distolateral spine.

Compl. Ref.:
Roe, 1972 (p.277, tabl.1, tabl.2); 1972 b (p.545); Vives, 1982 (p.293); Lozano Soldevilla & al., 1988 (p.59); Wishner & al., 2008 (p.163, Table 2, fig.8, oxycline); Hirai & al., 2020 (p.1, Fig. 5: cluster analysis (OTU), spatial distribution).
NZ: 3

Distribution map of Metridia effusa by geographical zones
Canary Is., W Indian, Arabian Sea, Pacif. (subtropical, rare)
N: 6
(67) F: 1,79-1,58; M: 1,44-1,36; (199) F: 1,75-1,6; {F: 1,58-1,79; M: 1,36-1,44}
Rem.: meso-bathypelagic.
For Grice & Hulsemann (1967, p.29) the female resembles M. venusta Giesbrecht and M. brevicauda Giesbrecht.
Last update : 29/10/2020
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 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed February 05, 2023]

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Marine Planktonic Copepods

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