Landrumius gigas - Species Card - Marine Planktonic Copepods

Landrumius gigas A. Scott, 1909 (F, juv.M)

Taxonomy

Order Calanoida

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Superfamily Clausocalanoidea

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Family Scolecitrichidae

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Genus Landrumius

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Abbreviations or symbols

Synonymy

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)

References

List of the studied authors

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)

Figures

Plate 1 issued 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).

Plate 2 issued 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 figures

Plate 3 issued 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 figures

Plate 4 issued 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 figures

Plate 5 issued 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 figures

Plate 6 issued 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 figures

Plate 7 Issued 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.

Complementary References

List of the studied authors

Razouls & al., 2000 (p.343, Appendix)

Distribution

NZ: 4

Distribution map of Landrumius gigas by geographical zones

Distribution map of Landrumius gigas and for the Zone Sub-Antarctic

Localisations

Geographical glossary

Sub-Antarct. (SE Pacif.), Indonesia-Malaysia, NW Pacif. (off E Japan), off Juan Fernandez Is., S Chile

Quotations

N: 6

Dimensions (mm)

References of the authors concerning dimensions

(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}

Remarks

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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