Species Card of Copepod
Cyclopoida ( Order )
    Oithonidae ( Family )
        Oithona ( Genus )
Oithona alvarezi  Lindberg, 1955   (F,M)
Ref.:
Lindberg, 1955 e (p.462, 467, figs.F); Shuvalov, 1980 (p.167, figs.F)
Species Oithona alvarezi - Plate 1 of morphological figuresissued from : K. Lindberg in Akiv Zool., 1955, 7 (23). [p.463, Fig.1].
Female (from Laguna Coyuca, W Mexico): a, P5 and genital segment (ventral), anal segment and caudal rami (dorsal); b, Md.
Nota: Ratio cephalothorax and thoracic segment 5: abdomen + caudal rami 1.63:1. Rostrum absent. Caudal rami strongly diverging. A1 14-segmented (any segments more or less indisticct). Formula of the outer spines spines of exopod P1 to P4: 1-1-3; 1-1-3; 1-1-2; 1-1-2, respectively; setae of exopod of P1 to P4: 0-1-5; 0-1-5; 0,-1-5; 0-1-5, respectively; setae of endopod of P1 to P4: 1-1-6; 1-2-6; 1-2-6; 1-2-5, respectively. P5 with 2 setae of unequal length.P6 like a strong spine, curved on the ventral face.

Male: Caudal rami 2 times length than wide. P6 as a short spine.

Compl. Ref.:
Suarez-Morales & Gasca, 1998 a (p.111)
NZ: 1

Distribution map of Oithona alvarezi by geographical zones
Loc:
NE Pacif.: Mexico (laguna Coyuca, Guerrero State)
N: 1
Lg.:
(623) F: 0,551-0,579; M: 0,503; {F: 0,551-0,579; M: 0,503}
Rem.: For Lindberg (1955, o.464) the species resembles Oithona dissimilis, but differs by the armature of the swimming legs.
Last update : 24/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed August 08, 2022]

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