Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Landrumius ( Genus )
Landrumius gigas  (A. Scott, 1909)   (F, juv.M)
Syn.: Brachycalanus gigas A. Scott, 1909 (p.81, Descr. juv.M, figs. juv.M); Bradford & al., 1983 (p.88);
Lophothrix gigas Vervoort, 1965 (p.58, Rem.); Grice & Hulsemann, 1968 (tab.2, p.332, Descr.F, figs.F, Rem.);
Lophothrix thorsoni Björnberg, 1975 (p.178, figs.F); Bradford & al., 1983 (p.88)
Park, 1983 (p.195, Redescr.F, figs.F); Bradford-Grieve & al., 1999 (p.881, 931, figs.F); Boxshall & Halsey, 2004 (p.193, fig.F); Vyshkvartzeva, 2005 (p.164, Redescr.F, figs.F, Rem.); Park & Ferrari, 2009 (p.143, Table 5, Appendix 1, biogeography from Southern Ocean)
Species Landrumius gigas - Plate 1 of morphological figuresissued from : T. Park in Antarct. Res. Ser. Washington, 1983, 38 (3). [p.196, Fig.17].
Female (SE Pacific): a, habitus (lateral left side); b, forehead (dorsal); c, idem (ventral); d, idem (lateral); e, last thoracic segments and urosome (dorsal); f, idem (lateral left side); g, P1 (anterior).

Species Landrumius gigas - Plate 2 of morphological figuresissued from : T. Park in Antarct. Res. Ser. Washington, 1983, 38 (3). [p.197, Fig.18].
Female: a, P2 (posterior); b, P3 (posterior); c, P4 (posterior); d, P5 (posterior).

Species Landrumius gigas - Plate 3 of morphological figuresissued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate XXXV, Figs.10-18]. As Brachycalanus gigas.
Male (from Manipa Strait): 10, habitus (dorsal); 11, forehead (lateral); 12, last thoracic and genital segments (left side); 13, rostrum; 14, A1; 15, Mx2; 16, P2; 17, P4 (endopodite); 18, P5.

Species Landrumius gigas - Plate 4 of morphological figuresissued from : T.K.S. Björnberg in Ciencia E Cultura, 1975, 27 (2). [p.179, Figs.15-23]. As Lophothrix thorsoni.
Female (from off Galera, S Chile): 15, habitus (lateral); 16, forehead (lateral); 17, rostrum); 18, posterior thoracic margin and urosome (lateral right side); 19, A1; 20, Md (mandinular palp); 21, Md (mandibular blade); 22, Mxp; 23, P5.
Scales: 1 mm (15, 16, 18, 19, 20, 22); 0.100 mm (21); 0.50 mm (23).
Nota: Head without crest; rostrum duckbill-like. A1 24-segmented, and does not reach the end of the metasome segments. Genital segment almost completely covered laterally by the lappets formed by the border of the last metasome segment.

Species Landrumius gigas - Plate 5 of morphological figuresissued from : T.K.S. Björnberg in Ciencia E Cultura, 1975, 27 (2). [p.180, Figs.24-30]. As Lophothrix thorsoni.
Female: 24, A2; 25, Mx1; 26, Mx2; 27, P1; 28, P2; 29, endopod of P2 (dorsal view); 30, endopod of P3 (dorsal view).
Scales: 1 mm (24, 27, 28); 0.500 mm (29, 30); 0.100 mm (25, 26);.

Species Landrumius gigas - Plate 6 of morphological figuresissued from : G.D. Grice & K. Hulsemann in Pacif. Sci., 1968, 22 (3). [p.333, Figs.63-74]. As Lophothrix gigas.
Female (from SE Pacific): 63-64, habitus (dorsal and lateral, respectively); 65 anterior end of head (dorsal); 66, idem (lateral); 67, rostrum (lateral); 68, posterior end of thorax and urosome (dorsal); 69, idem (lateral); 70, P1; 71, endopod of P2; 72, endopod of P3; 73, endopod of P4; 74, P5.

Species Landrumius gigas - Plate 7 of morphological figuresIssued from : N.V. Vyshkvartzeva in Zoosyst. Rossica, 2005, 13 (2). [p.165, Figs.37-42].
Female (from 30°48'N, 155°02'E): 37-38, habitus (dorsal and lateral, respectively); 39, distal endopodal complex of Mx2; 40, P1; 41, P3; 42, P5.

Compl. Ref.:
Razouls & al., 2000 (p.343, Appendix)
NZ: 4

Distribution map of Landrumius gigas by geographical zones
Sub-Antarct. (SE Pacif.), Indonesia-Malaysia, NW Pacif. (off E Japan), off Juan Fernandez Is., S Chile
N: 6
(5) juv. M: 7,2; (6) F: 8,58-7,58; (100) F: 8,66-7,91; (288) F: 8,25; (941) F: 7,8; {F: 7,58-8,66}
Rem.: Meso-bathypelagic.
Sampling depth (Antarct.) : 0-2500 m.
For Vyshkvartzeva (2005, p.166) the female collected in the North Pacific is similar to that described by Park (1983) from the southeastern Pacific. It differ from the latter in the shape of the forehead having a somewhat flattened crest in lateral view, the posterolateral corners of pediger somte 5 bearing a small distal knob, the rostrum devoid of distal points (which corresponds to the rostrum dscribed by Björnberg (1975)), and the absence of distal vesicle of the spermatheca. P5 of specimens illustrated by Grice & Hulsemann (1968) differs from that North Pacific specimen and Park's specimen in having the inner apical spine much longer than the other three spines. Park (1983) noted individual variations in both the distal end of 5th thoracic segment and the rostrum among his six specimens
Last update : 22/03/2015
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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 December 02, 2021]

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