Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Metridinidae ( Famille )
        Pleuromamma ( Genre )
Pleuromamma antarctica  Steuer, 1931   (F,M)
Syn.: Pleuromamma robusta antarctica Steuer, 1931 (p.8, fig.F); 1932 a (p.24, figs.F,M); 1933 (p.13, figs.F); Mackintosh, 1934 (p.85); Hardy & Gunther, 1935 (p.167); Vervoort, 1951 (p.123, figs.F,M, Rem.); 1957 (p.125, Rem.); 1965 (p.107); Ramirez, 1969 (p.73, figs.F,M); Rudyakov, 1972 (p.886, Table 1: sinking rate); Bradford, 1972 (p.46); Séret, 1979 (p.139, figs.F,M); Razouls, 1994 (p.146, figs.F,M, Rem); Errhif & al., 1997 (p.422); ? Pleuromamma robusta : Mazzocchi & al., 1995 (p.57, figs.F,M, Rem.)
Ref.:
Ferrari & Saltzman, 1998 (p.217, figs.F,M, Rem.); Park & Ferrari, 2009 (p.143, Table 3, Appendix 1, biogeography from Southern Ocean); Cheng F. & al., 2013 (p.119, molecular biology, GenBank)
Espèce Pleuromamma antarctica - Planche 1 de figures morphologiquesPleuromamma robusta antarctica
Female: 1, dorsal view; 2, Urosome (dorsal); 3, P5; issued from Séret, 1979 (var. robusta ?). 4, dorsal view; 5, A1; 6 & 6', Urosome (dorsal, lateral); 7 P5; issued from : Vervoort, 1951 (var. antarctica).

Male: 8, dorsal view; 9, P5; issued from Séret, 1979. 10, P5 (G: left; Dt: right); issued from Vervoort, 1951


Espèce Pleuromamma antarctica - Planche 2 de figures morphologiquesComparison between robusta and antractica; issued from : Séret C., 1979.
1: Furca and A1 from robusta robusta.
2: Furca and A1 from robusta antarctica;
P5 female from Pleuromamma sp. (Kerguelen Islands).


Espèce Pleuromamma antarctica - Planche 3 de figures morphologiquesIssued from: M.G. Mazzocchi, G. Zagami, A. Ianora, L. Guglielmo & J. Hure in Atlas of Marine Zooplankton Straits of Magellan. Copepods. L. Guglielmo & A. Ianora (Eds.), 1995. [p.59, Fig.3.6.1]. As Pleuromamma robusta.
Female: A, habitus (dorsal); B, forehead (lateral); C, urosome (lateral left side); D, P5.
Nota: Pigmented spot on right side of cephalothorax. Proportional lengths of urosomites and furca 41:24:17;18 = 100. Anal somite produced into distinct tooth-like corner on each side with 3 pores at tip; dorsal distal margin bordered with a row of denticles and concave area ornated with short setae. Caudal rami slightly asymmetrical, left one slightly longer; inner edge of both rami hairy; dorsal surface of left ramus with row of long setules along midline.

Male: E, habitus (dorsal); F, left P5; G, right P5.
Nota: Proportional lengths of urosomites and furca 15:18:16:19:16 = 100.3rd urosomal somite with a clutch of long hairs on posterior margin of left side.


Espèce Pleuromamma antarctica - Planche 4 de figures morphologiquesissued from : F.D. Ferrari & J. Saltzman in Plankton Biol. Ecol., 1998, 45 (2). [p.219, Fig.8].
Female (from 55° S, 21°E): A, genital complex (ventral); B, idem (lateral right side); C, A1 sgments 2-4 (arrows to recurved hooks).

Male: D, rostral area (lateral left side); E, urosomal segment 3; F, urosomal segments 2-3 (ventral); G, left A1 segments 13-14 (arrowhead to tip of distal rogid seta, arrow to axial angle of segment attenuation); H, P5 (anterior) (short arrow connects left coxa and basis; arthropodial membranes and poorly sclerotized areas stippled) ; I, P5 (posterior) (curved arrow to angled proximal face of attenuation of left exopod 3; straight arrow to twisted attenuation of left exopod 1; short arrow connects left coxa and basis; arthropodial membranes and poorly scletotized areas stippled).

Nota: Thoracic, abdominal somites and ramal segments are numbered according to their appearance during development as interpreted from data of Hulsemann (1991).


Espèce Pleuromamma antarctica - Planche 5 de figures morphologiquesissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.125, Fig.68]. As Pleuromamma robusta forma antarctica.
Female (from ± 66°.5S, 11°W): a, urosome (dorsal); b, habitus (dorsal); c, right A1 (proximal portion).
Nota: Head and 1st thoracic segment fused, 4th and 5th fused. Rostrum with 2 filiform appendages. The eye spot (pigment) is found on the right side of the body (in all specimens). Proportional lengths of cephalothorax and abdomen as 54:29. Abdomen 3-segmented; proportional lengths with the caudal rami 38:25:18:19 = 100. A1 23-segmented (tth-9th segments fused; basal segments without spines or teeth.


Espèce Pleuromamma antarctica - Planche 6 de figures morphologiquesissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.126, Fig.69]. As Pleuromamma robusta forma antarctica.
Female: a, urosome (lateral, left side); b, right P5 (anterior).
Nota: Genital segment laterally with a huge ventral swelling, greatest lateral diameter in the first third of the segment. Anal segment symmetrical, on each side produced into a distinct tooth-like corner. Anal valve semicircular, not set with teeth. Caudal rami slightly longer than twice the diameter, slightly asymmetrical (left ramus slightly longer); there are 4 marginal setae of nearly equal length, densely plumose, an additional seta is found along the outer margin, about halfway its length; inner edge of caudal rami haired.

Male: c, P5 (anterior; lt = left foot, rt = right foot).
Nota: The male differs from P. robusta normally met in tropical waters by the scantiness of the hair covering; no spinules or tubes are found along the edge of the anal operculum.


Espèce Pleuromamma antarctica - Planche 7 de figures morphologiquesIssued from : C. Séret in Thesis 3ème Cycle UPMC, Paris 6. 1979. [Pl. XXXVI, Figs.234-237]. As Pleuromamma robusta.
Female (from off Kerguelen Is.): 234, habitus (dorsal); 235, urosome (dorsal); 236, A1; 237, P5.


Espèce Pleuromamma antarctica - Planche 8 de figures morphologiquesIssued from : C. Séret in Thesis 3ème Cycle UPMC, Paris 6. 1979. [Pl. XXXVI, Figs.238-240]. As Pleuromamma robusta.
Male: 238, habitus (dorsal); 239, A1; 240, P5 (D = right leg; G = left leg)..

NZ: 4

Carte de distribution de Pleuromamma antarctica par zones géographiques
Espèce Pleuromamma antarctica - Carte de distribution 3Issued from : C. Séret in Thesis 3ème Cycle, UPMC, Paris 6. 1979, Annexe. [p.22].
Geographical occurrences of Pleuromamma robusta (= P. robusta) in the Indian Ocean and Antarctic zone. [after publications from: Brady, 1883, 1918; Thompson, 1900; Wolfenden, 1908, 1911; With , 1915; Rosendorn, 1917; Farran, 1929; Sewell, 1929, 1947; Brady & Gunther, 1935; Steuer, 1929, 1392, 1933; Ommaney, 1936; Vervoort, 1957; Tanaka, 1960; Brodsky, 1964; Seno, 1966; Andrews, 1966; Grice & Hulsemann, 1967; Seno, 1966; Frost & Fleminger, 1968; Voronina, 1970; Zverva, 1972].

Nota: It is unlikely that the occurrences in the northern Indian Ocean are Pleuromamma robusta F. Dahl, 1894 and in the antarctic waters the form of Pleuromamma antarctica from Steuer, 1931.
Loc:
Antarct., sub-Antarct., Straits of Magellan (Pacific area), S Indian (subtropical convergence), S Kerguelen Is., New Zealand (Kaikoura)
N: 12
Lg.:
(25) F: 4,5-3,65; M: 3,6-3,06; (31) F: 4,55-4; M: 3,1; (36) F: 3,82-3,45; M: 3,27-3,14; (246) F: 3,91-4,64; M: 3,19-3,48; (426) F: 4,19-1,2; M: 3,19-3,48; (772) F: 4,5-3,9; M: 3,6-2,9; {F: 1,20-4,64; M: 2,90-3,60}

The mean female size is 3.859 mm (n = 12; SD = 0.9208), and the mean male size is 3.274 mm (n = 11; SD = 0.2335). The size ratio (male : female) is 0.87 (n = 6; SD = 0.1876).
Rem.: D'après C. Séret (1979, p.141) l'espèce effectue des migrations verticales importantes entre la surface et 1500 m. Elle set absente de la surface le jour et se concentre essentiellement vers 600 m. La nuit, son effectif est abondant en surface.
Voir aussi les remarques en anglais
Dernière mise à jour : 13/02/2016

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Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2020. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 01 décembre 2020]

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