Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Euchaetidae ( Famille )
            Paraeuchaeta ( Genre )
Paraeuchaeta austrina  (Giesbrecht, 1902)   (F,M)
Syn.: Euchaeta austrina Giesbrecht, 1902 (p.22, figs.F,M); Wolfenden, 1911 (p.296); Hopkins & Torres, 1988 (tab.1); Fontaine, 1988 (p.46, figs.F);
? E. austrina : Vervoort, 1957 (p.78, figs.M, Rem.)
Ref.:
Senô & al., 1963 a (p.8, figs.F); Bradford, 1981 (p.401: Table 5): Bradford & al., 1983 (p.20); Park, 1994 (p.321); 1995 (p.90, Rem.)
Espèce Paraeuchaeta austrina - Planche 1 de figures morphologiquesissued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.55]. With doubt.
Male (from 66°11'S, 65°10'E): a, habitus (lateral); b, posterior part cephalothorax and urosome (lateral); c-d, terminal portions of left P5.


Espèce Paraeuchaeta austrina - Planche 2 de figures morphologiquesissued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.56]. With doubt.
Male: a, posterior part cephalothorax and genital somite (dorsal); b, forehead (lateral).


Espèce Paraeuchaeta austrina - Planche 3 de figures morphologiquesissued from : J.M. Bradford in N. Z. Jl Mar. Freshw. Res., 1981, 15. [p.401, Table 5 (part.)].
Female & Male (from Giesbrecht, 1902): Distinguishing features of species of Paraeuchaeta closely related to P. antarctica (* for code see p.393, Fig.2 in P. erebi).


Espèce Paraeuchaeta austrina - Planche 4 de figures morphologiquesissued from M. Fontaine in Biol. Antarctic Seas XIX, Antact. Res. Ser., 1988, 47. [p.47, Fig.16]. As Euchaeta austrina.
Female (from Ross Sea): A, rostrum; B-F, genital segment (B, sta. 2086, right lateral; C, sta. 2089, ventral; D, sta. 2086, left lateral; E, sta. 2086, ventrolateral; F, sta. 1077, right lateral); G, Md (mandibular palp); H, Md (gnathobase).

Nota: A2 as in but with no seta discernible on exopod segment 2. mxp bearing a minute ''flagellum'' or spinule on several of the large curved terminal endopodal setae.


Espèce Paraeuchaeta austrina - Planche 5 de figures morphologiquesissued from M. Fontaine in Biol. Antarctic Seas XIX, Antact. Res. Ser., 1988, 47. [p.48, Fig.17]. As Euchaeta austrina.
Female: A-C, Mx1; D, Mx2; E, P1; F, P2.
Scale bars: 0.25 mm each.P. antractica). Exopod of P1: Aa ± 4/5 AB; Bb > BC; Cc ± 5/4 BC. Exopod of P2: Aa ± 4/3 AB; Bb ± 1/2 BC; Cc ± 2/3 CD.


Espèce Paraeuchaeta austrina - Planche 6 de figures morphologiquesissued from : W. Giesbrecht in Copepoden. Res. voyage du S. Y. Belgica. Rapports scientifiques, Zoologie, 1902. [Taf. III, Figs.9-16]. As Euchaeta austrina.
Female (from S Peter Ist Island): 9, last thoracic segment and genital segment (ventral); 10, idem (lateral); 11, exopod of P1; 13, exopodite 3 of P3.

Male: 12, exopod of P1; 14, exopodite 3 of P2; 15, P5 (anterior); 16, distal part of left P5.


Espèce Paraeuchaeta austrina - Planche 7 de figures morphologiquesParaeuchaeta austrina Female:
1 - See key to species Groups and independent species of Paraeuchaeta (p.30).
2 - An endopodal seta of Mx2 armed with long spinules in addition to dense rows of small spinules (Fig.17 D in Fontaine, 1988).
3 - Ventrally, genital field about symmetrical (Fig.16 C in Fontaine, 1988).

Ref. compl.:
Sewell, 1948 (p.574); Razouls & al., 2000 (p.343, tab. 2, 5, Appendix); Park & Ferrari, 2009 (p.143, Table 3, 8, Appendix 1, biogeography)
NZ: 1

Carte de distribution de Paraeuchaeta austrina par zones géographiques
Espèce Paraeuchaeta austrina - Carte de distribution 3issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.57]. As Euchaeta austrina male.
Chart showing the geographical distribution (white circle) in the seas surrounding the Antarctic continent.
Nota: In this chart the area frequented by whaling vessels has been hatched. The Antarctic circle (66°.5 S) has been drawn as a broken line. The numbers I to VI refer to the sectors into which the Antarctic seas are divided according to Mackintosh (1942) (after Vervoort, 1951).
Espèce Paraeuchaeta austrina - Carte de distribution 4issued from M. Fontaine in Biol. Antarctic Seas XIX, Antact. Res. Ser., 1988, 47. [p.43, Fig.13].
Occurrence of P. austrina.
Open circles show stations where no adults were found. RSSW = Ross Sea Shelf Water; CDW = Circumpolar Deep Water.
Espèce Paraeuchaeta austrina - Carte de distribution 5issued from M. Fontaine in Biol. Antarctic Seas XIX, Antact. Res. Ser., 1988, 47. [p.36, Fig.6].
Occurrence of P. austrina.
Open circles show stations where no adults were found. Solid line: Antarctic Convergence.

Nota: According to Fontaine (1988, p.49) Giesbrecht (1902) described P. austrina from a male and a female collected from 350 m and 400 m, respectively, through the ice in the Bellingshausen Sea. In the Fontaine’s samples, the species were also collected at intermediate depths in the southwestern part of the Ross Sea and in the northwestern part of the Weddell Sea, east of the South Orkney Islands. The species is also recorded from the Indian sector (67°34’S, 35°51’E by Senô & al. (1663). For Vervoort (1965) P. autrina is one of the copepod species characteristic of the Warm Deep Layer
Loc:
Antarct. (SW Atlant., Weddell Sea, Indian, Ross Sea, SE Pacif., Bellingshausen Sea)

Locality type: 70°41'S, 90°14'W.
N: 7
Lg.:
(33) F: 6; M: 4,75; (397) F: 6,5-5,6; {F: 5,60-6,50; M: 4,75}
Rem.: Sampling depth (Antarct.) : 500-700 m. Cette forme semble proche de P. antarctica.
Voir aussi les remarques en anglais
Dernière mise à jour : 27/01/2015

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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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