Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Arietellidae ( Family )
            Arietellus ( Genus )
Arietellus pacificus  Esterly, 1913   (F)
Esterly, 1913 (p.189, figs.F); Brodsky, 1950 (1967) (p.397, figs.F)
Species Arietellus pacificus - Plate 1 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 10, Figs. 9, 23].
Female (from S California): 9,forehead (lateral); 23, abdomen and last thoracic segment (lateral).

Nota : Rostral filaments delicate but straight and rather stiff.
A1 19-segmented, reaching the posterior border of the 2 nd thoracic segment ; 1st segment as long as the next eight together.
Cephalothorax length = 3.6 mm.
Coloration opaque and without pigment.

Species Arietellus pacificus - Plate 2 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 12, Figs. 46, 55].
Female: 46, P1; 55, P5.

Nota: P1 length : 1.285 mm. P5 (two sdistal segments only) : 400 µm.

Compl. Ref.:
Sewell, 1948 (p.559, 563); Suarez-Morales & Gasca, 1998 a (p108); Galbraith, 2009 (pers. comm.); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, pers. comm.)
NZ: 2

Distribution map of Arietellus pacificus by geographical zones
NE Pacif. (California, Vancouver Is.)
N: 3
(22) F: 4,5; {F: 4,50}
Last update : 29/12/2014
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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 May 25, 2024]

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Marine Planktonic Copepods

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