Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Tharybidae ( Family )
            Tharybis ( Genus )
Tharybis magna  Bradford & Wells, 1983   (F,M)
Syn.: Stephus neptuni : Wolfenden, 1911 (p.206, figs.F, Rem.)
Bradford & Wells, 1983 (p.4, Descr.F,M, figs.F,M); Andronov, 2002 (p.47, figs.F,M); Ferrari & Markhaseva, 2005 (p.46: tab.1)
Species Tharybis magna - Plate 1 of morphological figuresissued from : V.N. Andronov in Arthropoda Selecta, 2002, 11 (1). [p.51, Figs.241-252]. After Ohtsuka & al., 1998 (fig.245), others figures after Bradford & Wells, 1983.
Female: 241-242, habitus (dorsal and lateral, respectively); 243, urosome (dorsal); 244, idem (left lateral side); 245, -246, P5.

Male: 247-248, habitus (dorsal and dorso-lateral, respectively); 249, left P5; 250, exopod of left P5; 251, right P5; 252, distal segment of right P5.

Species Tharybis magna - Plate 2 of morphological figuresissued from : J.M. Bradford & J. Wells in Polar Biol., 1983, 2. [p.5, Fig.4].
Female (from Ross Ice Shelf: 82°22.5'S, 168°37.5'W): a-b, habitus (dorsal and lateral, respectively); c-d, urosome (dorsal and lateral, respectively).

Nota: Rostral filaments absent. Head and pedigerous segment 1 separate, 4 and 5 fused but fusion line visible dorsally. A1 24-segmented, extends to posterior border of pedigerous segment 1.

Species Tharybis magna - Plate 3 of morphological figuresissued from : J.M. Bradford & J. Wells in Polar Biol., 1983, 2. [p.5, Fig.5].
Female: a, A1; b, A2; c, Md; d, Mx2; f, Mxp; gj, P1 to P4; k, P5.

Nota: A2 endopod segment 1 with 2 outer edge setae; exopod segments 1 and 2 naked, segments 3-6 small, each with long seta, segment 7 with small proximal seta extending about 2/3 its length. Mx1inner lobe with 4 oosterior surface setae, 9 spine-like setae distally and 1 small exterior surface seta, inner lobe 2 with 3 setae, inner lobe 3 with 4 setae, endopod with 3 + 2 + 5 setae, exopod with 4 setae, one very small, outer lobe 1 with 7 large setae. Mx2 endopod with 3 worm-like and 5 brush-like sensory filaments, inner lobe 5 with 1 worm-like sensory filament in addition to spines and setae.

Species Tharybis magna - Plate 4 of morphological figuresissued from : J.M. Bradford & J. Wells in Polar Biol., 1983, 2. [p.6, Fig.6].
Male: a-b, habitus (lateral and dorsal, respectively); c, urosome (dorsal); d, left A1; e-h, P1 to P4; i, right P5; j, left P5.

Nota: A1 23-segmented, extending beyond posterior border of metasome, segments 20 and 21 partly fused on left. Rostral filament absent.

Compl. Ref.:
Razouls & al., 2000 (p.343, tab. 2, 5, Appendix); Bradford-Grieve, 2004 (p.285); Schnack-Schiel & al., 2008 (p.1046: Tab.2)
NZ: 1

Distribution map of Tharybis magna by geographical zones
Antarct. (Ross Sea, W Weddell Sea)
N: 2
(452) F: 1,66-1,5; M: 1,56-1,49; {F: 1,50-1,66; M: 1,49-1,56}
Rem.: Sampling depth (Antarct.) : Sea floor-ice, 500-1000 m.
Last update : 01/02/2015
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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., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed April 10, 2021]

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Marine Planktonic Copepods

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