Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Gaetanus ( Genus )
Gaetanus brevicaudatus  (Sars, 1907)   (F)
Syn.: Chiridius brevicaudatus Sars, 1907 (p.7);
Gaidius brevicaudatus : Sars, 1925 (p.48, Descr.F, figs.F); Sewell, 1948 (p.499); Park, 1975 a (p.11); 1978 (p.127); Bradford & Jillett, 1980 (p.58); Ref. compl.:C.B. Wilson, 1950 (p.234); Grice & Hulsemann, 1967 (p.15); Björnberg, 1973 (p.323, 386)
Ref.:
Park, 1975 a (p.13); Markhaseva, 1996 (p.183, figs.F); Vives & Shmeleva, 2007 (p.590, figs.F, Rem.)
Species Gaetanus brevicaudatus - Plate 1 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.186, Fig.145].
Female (specimen frpm NW Pacif.: Izu-Bonin Trench).Ce: forehead (lateral; R: rostrum (anterior); CP4: coxopod of P4 (partial).

Nota: Spines on last thoracic segment situated in the middle of segment border (lateral view), very minute and short.


Species Gaetanus brevicaudatus - Plate 2 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XV, figs. 1-13]. As Gaidius brevicaudatus.
Female: 1, habitus (dorsal); 2, idem (lateralleft side); 3, forehead (lateral); 4, rostrum (frontal view); 5, A2; 6, Md; 7, Mx1; 8, Mx2; 9, Mxp; ; 10, P1; 11, P2; 12, P4; 13, inner distal margin of basal segment of P4 (enlarged).


Species Gaetanus brevicaudatus - Plate 3 of morphological figuresGaetanus brevicaudatus female:
1 - Anterior part of cephalon without frontal spine.
2 - Posterior corners of last thoracic segment with spines.
3 - Exopodal segment 1 of A2 with 1 seta; segment 2 with 2 setae. 2nd internal lobe of Mx1 with 5 setae. Exopod of P1 3-segmented with 3 external spines.
4 - Exopodal segment 2 of A2 with 2 setae. Lateral plate of Mxp protopodite faintly developed.

NZ: 8

Distribution map of Gaetanus brevicaudatus by geographical zones
Loc:
off Canary Is., G. of Mexico, Faroe Is., W Indian, Izu-Bonin Trench, SW Galapagos, off Easter Is., Chile.

Type locality: 27°43'N, 18°28'W.
N: 8
Lg.:
(1) F: 4,5; (37) F: 4,5-3,9; {F: 3,90-4,50}
Rem.: bathypelagic.
Last update : 05/01/2015
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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 February 28, 2021]

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