Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Stephidae ( Family )
            Stephos ( Genus )
Stephos kurilensis  Kos, 1972   (F,M)
Ref.:
Kos, 1972 a (1973) (p.113, figs.F,M); Bradford-Grieve, 1999 a (p.25, Table1: Rem.); Kos, 2016 (p.13, figs.F, M, Rem.)
Species Stephos kurilensis - Plate 1 of morphological figuresissued from : M.S. Kos in Crustaceana, 1972, 23 (2). [p.114, Fig.1].
Female (Izmena bay, Kunashir Island): A-B, habitus (dorsal and lateral, respectively).
Nota: Head and Th1 fused, 4th and 5th fused.
Last thoracic segment asymmetrical, the right side more elongated, extending to the middle of the genital segment; the distal corner of the segment widely rounded in lateral view.
Rostal prominence low, without filaments.
Urasome 4-segmented, its length is less than 1/3 of the cephalothorax.
Genital segment swollen on the left lateral margin.
Caudal rami symmetrical, with 4 strong and 1 small setae, the innermost seta arises separately from the distal margin of the ramus.


Species Stephos kurilensis - Plate 2 of morphological figuresissued from : M.S. Kos in Crustaceana, 1972, 23 (2). [p.115, Fig.2].
Female: A, A1; B, A2; C, Md; D, Mx1; E, Mx2; F, Mxp; G-J, P1 to P4; K, P5.
Nota: A1 symmetrical, 24-segmented, reaching almost the proximal margin of the genital segment.
A2 with protopod 2-segmented; exopod longer than the endopod; exopod 5-segmented with 3 terminal setae and 6 setae along the inner edge; endopod 2-segmentd, last segment with 6 terminal setae.
Denticulate orocess of Md with 9 teeth; basipod with 4 strong setae along the inner edge; exopod 4-segmented with 6 setae; endopod 2-segmented, its 1st segment with a few setae, 2nd segment with 8 terminal setae.
P5 symmetrical, 3-segmented; terminal segment short and broad basally, its slightly narrows distally, the external distal edge is strongly serrate, at its base it carries a short, thick, strongly serrate process, which tapers apically.


Species Stephos kurilensis - Plate 3 of morphological figuresissued from : M.S. Kos in Crustaceana, 1972, 23 (2). [p.116, Fig.3].
Male: A-B, habitus (dorsal and lateral, respectively); C, P5.
Nota: Mouth parts and swimming legs as in female.
Right leg of P5 long and slender, 4-segmented, 3th segment very slender and long, it bears 1 small outside spine; last segment claw-like and carries 2 processes on the inner proximal margin; left leg 5-segmented, the penultimate segment is the largest and the most massive, it has a complex cristate formation; the terminal segment carries a number of plates and cristate formations in a complex arrangement.


Species Stephos kurilensis - Plate 4 of morphological figuresIssued from : M.S. Kos in Zoological Institut RAS, St. Petersburg, 2016, 179. [p.20, Fig.5]. Stephos kurilensis female and male.


Species Stephos kurilensis - Plate 5 of morphological figuresIssued from : M.S. Kos in Zoological Institut RAS, St. Petersburg, 2016, 179. [p.21, Fig.6]. Stephos kurilensis female.
Note the teeth of the edge of Md and P2.


Species Stephos kurilensis - Plate 6 of morphological figuresIssued from : M.S. Kos in Zoological Institut RAS, St. Petersburg, 2016, 179. [p.22, Fig.7]. Stephos kurilensis female: P1, P2 and P4.

NZ: 1

Distribution map of Stephos kurilensis by geographical zones
Loc:
NW Pacif. (Kuril Islands)
N: 1
Lg.:
(556) F: 1,42-1,26; M: 1,35-1,23; {F: 1,26-1,42; M: 1,23-1,35}
Rem.: above the Zostera belt (depth 10-16 m).
After Bradford-Grieve (1999 a, p.25) this species belongs to type III (see Genus Stephos).
Last update : 08/02/2019
    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 August 09, 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