Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Gaetanus ( Genus )
Gaetanus curvicornis  Sars, 1905   (F)
Syn.: Gaetanus curvirostris : Grice & Hülsemann, 1967 (p.15, lapsus calami )
Ref.:
Sars, 1905 b (p.11, Rem.F); Wolfenden, 1908 (p.32); 1925 (p.55, fig.F); Rose, 1933 a (p.100, fig.F); Jespersen, 1934 (p.61); Sewell, 1947 (p.58, 67, figs.F); Vervoort, 1952 e (n°46, p.3, fig.F); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48); Markhaseva, 1980 (p.628); 1996 (p.195, figs.F); Vives & Shmeleva, 2007 (p.577, figs.F,M, Rem.)
Species Gaetanus curvicornis - Plate 1 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVII, fig.2].
Female: 2, habitus (lateral left side).


Species Gaetanus curvicornis - Plate 2 of morphological figuresissued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.68 , Fig.12].
Female (from N Arabian Sea): A, Mx1; B, basal segment of Mxp; C, P1; D, P2; E, basal segment of P4.
Nota: Proportional lengths of the anterior and posterior regions of the body as 75 to 25. The proportional lengths of the segments of the body (cephalon to caudal rami) as 52:72:64:110:85:38:38:30:38 = 1000. The line of fusion of the head and the 1st pedigerous segment is clearly visible across the dorsal aspect. Spines on the 5th thoracic segment are long and slender, and reach back for about 3/4 the length of the genital segment. The posterior margins of the abdominal segments are devoid of any row of spines. A1 (24-segmented) over-reaches the posterior end of the body by about the last 3 segments. Basal segment of Mxp with crest-like, witout hook-like process.


Species Gaetanus curvicornis - Plate 3 of morphological figuresGaetanus curvicornis female:
1 - Anterior part of cephalon with frontal spine.
2 - Endopodal segments 1 of A2 with 1 seta, segment 2 with 3 setae. 2nd internal lobe of Mx1 with 5 setae.
3 - Exopodal segment 1 of P1 clearly 3-segmented; exopodal segment 1 with 3 external spines. Lateral plate of Mxp protopodite well developed.
4 - Spines of last thoracic segment straight, situated in about the middle of the posterior border of last thoracic segment (lateral view).
4 - Frontal spine directed straight forward and curved to rostrum by its top only.

Compl. Ref.:
Sewell, 1948 (p.331, 499, 520, 527, 532); De Decker & Mombeck, 1964 (p.12); Björnberg, 1973 (p.323, 386); Vives & al., 1975 (p.41, tab.II, XII); Deevey & Brooks, 1977 (p.256, tab.2, Station "S"); Vives, 1982 (p.291); Lapernat, 2000 (tabl.3, 4); Gaard & al., 2008 (p.59, Table 1, N Mid-Atlantic Ridge)
NZ: 6

Distribution map of Gaetanus curvicornis by geographical zones
Loc:
South Africa (E), off NW Cape Verde Is., off Morocco-Mauritania, off Madeira, Ibero-moroccan Bay, Portugal, Azores Is., Sargasso Sea, off Bermuda: Station "S" (32°10'N, 64°30'W), Baffin Bay, S Strait of Davis, W Medit. (Alboran Sea), Arabian Sea, Indian (W & SW), Chile.

Type locality: 36°46'N, 26°41'W.
N: 15
Lg.:
(1) F: 3,7; (11) F: 3,75; (32) F: 4,35; (37) F: 4,75-3,7; {F: 3,70-4,75}
Rem.: meso-bathypelagic- ?. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, station "S");
Last update : 07/12/2020
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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 October 18, 2021]

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