Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Aetideidae ( Famille )
            Chiridius ( Genre )
Chiridius obtusifrons  Sars, 1902   (F,M)
Syn.: Pseudocalanus armatus : Vanhöffen, 1897;
C. armatus : Sars, 1900 (p.64, figs.F, M); Ferrari & Dahms, 2007 (p.22, 27, Rem. N)
C. vanhöffeni Wolfenden, 1904 (p.117, figs.M);
no C. obtusifrons : A. Scott, 1909 (p.43, figs.F); C.B. Wilson, 1950 (p.189)
Ref.:
Sars, 1902 (1903) (p.29, figs.F,M, Rem.); With, 1915 (p.83, figs.F); Rose, 1933 a (p.94, figs.F,M); Jespersen, 1934 (p.56, figs.12, 13); Brodsky, 1950 (1967) (p.155, figs.F,M); Vervoort, 1952 c (n°44, p.3, figs.F,M); Vidal, 1971 a (p.15, 24, 113, figs.F,M); Park, 1975 b (p.289, Rem.); Tupitsky, 1982 a (p.110, figs.); Markhaseva, 1996 (p.116, figs.F,M); G. Harding, 2004 (p.55, figs.F,M)
Espèce Chiridius obtusifrons - Planche 1 de figures morphologiquesissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.117, Fig.88].
Female (specimen from Central part of Arctic Basin). Gn: genital segment (ventral and lateral).


Espèce Chiridius obtusifrons - Planche 2 de figures morphologiquesissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.118, Fig.89].
Female: distal part of metasome and genital segment (dorsal) in specimens from Arctic Basin..


Espèce Chiridius obtusifrons - Planche 3 de figures morphologiquesissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.118, Fig.90].
Male (specimen fron Central part of Arctic Basin)


Espèce Chiridius obtusifrons - Planche 4 de figures morphologiquesissued from : G.O. Sars in An Account of the Crustacea of Norway. Vol. IV. Copepoda Calanoida. Published by the Bergen Museum, 1903. [Pl. XVII].
Female & Male.


Espèce Chiridius obtusifrons - Planche 5 de figures morphologiquesIssued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.155, Fig.69].
Female (from Arctic): habitus (dorsal and lateral left side); S1, P1; S2, P2.
Nota: Spikes of terminal thoracic segment short, ending before middle of genital segment, directed somewhat laterally.

Male: habitus (dorsal); S5, P5.
Nota: P5 without traces of endopodites, each leg 5-segmented.


Espèce Chiridius obtusifrons - Planche 6 de figures morphologiquesissued from : G. Harding in Key to the adullt pelagic calanoid copepods found over the continental shelf of the Canadian Atlantic coast. Bedford Inst. Oceanogr., Dartmouth, Nova Scotia, 2004. [p.55].
Female & Male.

Nota: Female with tiny point in front (arrowed); urosome 1/2 length of prosome; metasomal points do not reach middle of genital segment (arrowed).
Caudal rami about twice as long as broad in both sexes


Espèce Chiridius obtusifrons - Planche 7 de figures morphologiquesChiridius obtusifrons female:1 - Exopod of Mx1 with 10 setae. Points of last thoracic segment reaching to the end of first third of genital segment, rarely reaching its middle.
2 - Endopodal segment 2 of Md with 9 terminal setae.


Espèce Chiridius obtusifrons - Planche 8 de figures morphologiquesChiridius obtusifrons male:
1 - Points of last thoracic segment not longer than genital segment.
2 - Right P5 longer than left. Exopodal segments 1 and 2 of P1 with external spines reaching the midlength of the next segment or longer.
3 - Points of last thoracic segment reaching at most the posterior border of genital segment. Endopodal segment 1 of Mxp with 3 medial setae.
4 - Exopodal segment 1 of P1 not reaching the base of following spine.
5 - P5 longer than than half length of P4.
6 - Distal segment of left P5 4.4-5.0 times longer than wide.

Ref. compl.:
Damas & Koefoed, 1907 (p.398, tab.II, III); Jespersen, 1939 (p.47, Rem., Table 29, 30); Østvedt, 1955 (p.14: Table 3, p.61); Grice, 1962 a (p.101); V.N. Greze, 1963 a (tabl.2); M.W. Johnson, 1963 (p.89, Table 1, 2); Harding, 1966 (p.17, 66); Dunbar & Harding, 1968 (p.319); Shih & al., 1971 (p.32, 201); Björnberg, 1973 (p.323, 385); Kovalev & Schmeleva, 1982 (p.83); Buchanan & Sekerak, 1982 (p.41, vertical distribution); Tremblay & Anderson, 1984 (p.3); Groendahl & Hernroth, 1986 (tab.1); Kosobokova, 1989 (p.27); Mumm, 1993 (tab.1, fig.2); Hanssen, 1997 (tab.3.1); Hirche & Kwasniewski, 1997 (p.299, Table 5); Kosobokova & al., 1998 (tab.2); Auel, 1999 (p.1); Kosobokova & Hirche, 2000 (p.2029, tab.2); d'Elbée, 2001 (tabl. 1); Ringuette & al., 2002 (p.5081, Table 1; Auel & Hagen, 2002 (p.1013, tab.2, 3); Hopcroft & al., 2005 (p.198, table 2); Hop & al., 2006 (p.182, Table 4); Deibel & Daly; 2007 (p.271, Table 1, Rem.: Arctic polynyas); Kosobokova & al., 2007 (p.919, Tab.3, 6, 7, fig.2); Blachowiak-Samolyk & al., 2007 (p.2716, Table 2); Blachowiak-Samolyk & al., 2008 (p.2210, Table 3, biomass); Walkusz & al., 2008 (p.1, Table 3, abundance); Darnis & al., 2008 (p.994, Table 1); Galbraith, 2009 (pers. comm.); Laakmann & al., 2009 (p.741, fig.2, vertical distribution, lipids analysis); Kosobokova & Hopcroft, 2010 (p.96, Table 1, fig.7); Dvoretsky & Dvoretsky, 2010 (p.991, Table 2); 2011 a (p.1231, Table 2: abundance, biomass); Kosobokova & al., 2011 (p.29, Table 2, figs.4, 8, Rem.: Arctic Basins); Matsuno & al., 2012 (Table 2); Laakmann & al., 2012 (p.535, Table 1, fig.2, Rem.: mol. Biol.); Smoot & Hopcroft, 2016 (p.1, fig.7, vertical distribution)
NZ: 5 + 3 douteuses

Carte de distribution de Chiridius obtusifrons par zones géographiques
Espèce Chiridius obtusifrons - Carte de distribution 3
Carte de 1996
Espèce Chiridius obtusifrons - Carte de distribution 4Issued from : S. Laakmann, M. Kochzius & H. Auel in Deep-Sea Res. I, 2009, 56. [p.745, Fig.2 c].
Vertical distribution abundance of copepodite stages C3 to C6 of Aetideopsis spp. and Chiridius obtusifrons. +: No occurrence; solid line depicts bottom profile (right axis); station 853 over the Yermak Plateau (81°22'N, 6°52'E) is separated from the other stations on the transect; other stations between East Greenland Current, the Fram Strait and the West Spitsbergen Current, into south return Atlantic Current (77°46'N-79°36'N, 6°20'E-7°29'W).
Deep-sea copepods collected from August 20 to September 16, 2006.
Loc:
North Sea, Norway Sea, Barents Sea, Franz Josef Land, Laptev Sea, Lomonosov Ridge, Canada Basin, Barrow Strait, Baffin Bay, Davis Strait, W Iceland, Greenland Sea, Fram Strait, Spitsbergen, Kongsfjorden, Alaska NW, Arctic (all polar basins), Fletcher's Ice Is., Chukchi Sea, Beaufort Sea, Canadian abyssal plain, Vancouver Is., G. of Maine, Nouvelle-Ecosse, Détr. d'Hudson, ! S Chile (sub-Antarct.) (in Björnberg, 1973), S Bay of Biscay (in d'Elbée, 2001); ? Medit. (Ionian Sea)
N: 59
Lg.:
(7) F: 4,39; (37) F: 4,6-3,5; M: 3,2-2,9; (65) F: 4,2; M: 2,9; (134) F: 4,3; M: 3,3; (1001) F: 3,98-4,52; (1089) F: 3,5-4,2; M: 2,9; {F: 3,50-4,60; M: 2,90-3,30}
Rem.: épi-méso-bathypélagique.
Les localisations du sud Chili, dans la partie sud du G. de Gascogne (mais possible compte tenu de la répartition mésopélagique de cette espèce) et en Méditerranée sont douteuses et nécessitent confirmation.
La localisation dans le NE atlantique: de 30 à 60° N (in Grice & Hulsemann, 1965, p.223) n'est pas précisée.
Voir aussi les remarques en anglais
Dernière mise à jour : 26/01/2017

 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :

Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2021. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 13 avril 2021]

© copyright 2005-2021 Sorbonne Université, CNRS

Webmaster
Mentions légales et informations nominatives
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université

 

Version française
English version

 

Rechercher

Sur le WEB du CNRS

 


Copépodes planctoniques marins

Copépodes planctoniques marins

 

Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins