Species Card of Copepod
Calanoida ( Order )
    Ryocalanoidea ( Superfamily )
        Ryocalanidae ( Family )
            Yrocalanus ( Genus )
Yrocalanus antarcticus  (Renz, Markhaseva & Schulz, 2012)   (F,M)
Syn.: Ryocalanus antarcticus : Renz & al., 2012 (p.150, Descr.F, M, figs.F, M, Rem.); Andronov, 2014 (p.44, fig.: P1)
Ref.:
Renz & al., 2013 (p.258)
Species Yrocalanus antarcticus - Plate 1 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.151, Fig.1]. As Ryocalanus antarcticus.
Female (from 73°24'S, 22°08'W): A-B, habitus (lateral and dorsal, respectively); C-D, rostrum (ventral and lateral, respectively); E-F, pedigers 4-5 and urosome (dorsal and lateral, respectively); G, posterior prosome and genital double-somite (dorsal); H, urosome (dorsal); J, urosome (right lateral); K urosome (left lateral); L, posterior prosome and urosome (ventral).
Scale bars = 0.1 mm.
A, C-D, F, H-K: holotype; B, E, L: paratypes; G: paratype from 52°02'S, 0°00'E.


Species Yrocalanus antarcticus - Plate 2 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.152, Fig.2]. As Ryocalanus antracticus.
Female: A, A1, segments I-XVIII, round dots are scars of broken aesthetasks; B, A1, segments XIX-XXVIII; C, A1, segment I; D, A1, segments I-XVI; E, A2 (coxa, basis and endopod); F, A2 (exopod); G, Mx1; H, Mx1 (praecoxal arthrite, asterisk marks teeth near bases of middle terminal spines; I, Mx1 (coxal endite.
A,B: paratype from52°02'S, 0°00'E; paratypes from 73°24'S, 22°08'W; H: holotype.
Scale bars = 0.1 mm.


Species Yrocalanus antarcticus - Plate 3 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.153, Fig.3]. As Ryocalanus antarcticus.
Female: A, Md; B, Mx2; C, Mxp; D, P1.
Scale bars = 0.1 mm.
A: paratype from 52°02'S, 0°0'E; B-D: paratypes from 73°24'S, 22°08'W.


Species Yrocalanus antarcticus - Plate 4 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.155, Fig.4]. As Ryocalanus antarcticus.
Female: A-C, P2 to P4, respectively.Scale bars = 0.1 mm.
A, B: holotype; C, paratype.


Species Yrocalanus antarcticus - Plate 5 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.156, Fig.5]. As Ryocalanus antarcticus.
Male: (from 73°24'S, 22°08'W): A-B, habitus (lateral and dorsal, respectively); C, forehead (lateral); D, rostrum (ventral); E, urosomal segment 5 and caudal rami (dorsal); F, left A1, segments I-XVI; G, left A1, segments XVII-XXVIII; H, P1; I, P5.
Scale bars = 0.1 mm.

Left A1 unmodified of 24 free segments extending to urosome (segments indicated on the figure in Roman numerals are primitive segments).


Species Yrocalanus antarcticus - Plate 6 of morphological figuresIssued from : J. Renz, E.L. Markhaseva & K. Schulz in Proc. Zool. Inst. RAS, 2012, 316 (2). [p.157, Fig.6]. As Ryocalanus antarcticus.
Male (from 73°24'S, 22°08'W): A, right A1, segments X-XXVIII, arrow shows small segment XIX; B, C, right A1, segments XVIII-XX (other views); D, A1, segments XXI-XXVIII (asterisk marks place of attachment of segment XX).
Scale bars = 0.1 mm.

Nota: Right A1 geniculate, strongly modified, 23 free segments (segments indicated on the figure in Roman numerals are primitive segments).


Species Yrocalanus antarcticus - Plate 7 of morphological figuresIssued from : V.N. Andronov in Russian Acad. Sci. P.P. Shirshov Inst. Oceanol. Atlantic Branch, Kaliningrad, 2014. [p.44, Fig.12, 7]. As Ryocalanus antarcticus after Renz & al., 2012.
Female P1.

NZ: 2

Distribution map of Yrocalanus antarcticus by geographical zones
Loc:
Antarct. (E Weddell Sea), sub-Antarct. (off E Bouvet)

Locality type: 73°24'S,22°08'W.
N: 1
Lg.:
(1305) F: 1,00-1,05; M: 0,75-0,80; {1,00-1,05; M: 0,75-0,80}
Rem.: Above seabed (depth: 1983 and 2987 m).
For Renz & al. (2012, p.154 ) the female is more closely related to R. admirabilis (= Yrocalanus admirabilis). This species is the first ryocalanoid copepod recorded from the Southern Ocean.
Last update : 20/04/2016
    to add your remark
  

 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., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed January 17, 2022]

© copyright 2005-2022 Sorbonne University, CNRS

Webmaster
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université

 

Version française
English version

 

Search

On the WEB of CNRS

 


Marine Planktonic Copepods

Marine Planktonic Copepods

 

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