List species and varieties by family
Arctokonstantinidae Markhaseva & Kosobokova, 2001 ( Spinocalanoidea )
(1) Arctokonstantinus Markhaseva & Kosobokova, 2001
Rem.: Type: Arctokonstantinus hardingi Markhaseva & Kosobokova, 2001. Total: 1 sp.
Considered as a type of a new family (Arctokonstantinidae) by Markhaseva & Kosobokova (2001, p.319), placed among the Spinocalanidae par Boxshall & Halsey (2004, p.196, 198).

Diagnosis after Markhaseva & Kosobokova (2001, p.320):
- Rostrum absent.
- Cephalon and 1st pedigerous seomite incompletely separate, 4th and 5th pedigerous somites separate.
- Urosome 4-segmented.
- Genital segment symmetrical.
- A1 24-segmented.
- A2 exopod incompletely 8-segmented (exopodal segments 2-3 partly fused), shorter than endopods (endopodal segment 1 with 1 seta).
- Md endopodal segment 1 without seta, endopodal segment 2 with 6 setae.
- Mx1 inner lobe 4 without setae (as Rhinomaxillaris), endopod rudimentary with 4 setae.
- P1 endopod without outer lobe and basis without inner setae (as Sognocalanus).

[1] Arctokonstantinus hardingi  Markhaseva & Kosobokova, 2001   (F)    [Figs]
(2) Caudacalanus Markhaseva & Schulz, 2008
Rem.: type: Caudacalanus mirus. Total: 2 spp.

[1] Caudacalanus mirus  Markhaseva & Schulz, 2008   (F)    [Figs]

[2] Caudacalanus vicinus  Markhaseva & Schulz, 2008   (F)    [Figs]
(3) Foxtonia Hulsemann & Grice, 1963
Rem.: Originally included, with doubt, in the Bathypontiidae. For Schulz (1996, p.599) this genus could be included among the Spinocalanidae. Position followed by Boxshall & Halsey, 2004 (p.196, Rem.), but genus considered by Markhaseva (2008) as belonging to the family Arctokonstantinidae.
1 sp.

[1] Foxtonia barbatula  Hulsemann & Grice, 1963   (F)    [Figs]
(4) Foxtosognus Markhaseva, 2008
Rem.: Type: Foxtosognus rarus Markhaseva, 2008. Total: 1 sp.

Diagnosis from Markhaseva (2008, p.9):
- Rostrum in short plate, rounded.
- Caudal rami symmetrical, their inner setae arranged symmetrically.
- A1 short, somewhat longer than cephalosome.
- A2 endopod longer and thicker than exopod; 2nd exopodal segment with 1 seta.
- Md basis of palp with 2 setae; 1st endopodal segment longer than 2nd segment, which is provided with 7 setae; terminal segment of exopod with 2 setar; gnathobase with 3 teeth and 2 setae.
- Mx1 praecoxal arthrite with 7 to 8 setae; both coxal and ptoximal basal endites reduced; distal basal endite without setae and separated from endopod with 3 setae; exopod with 4 setae.
- Mx2 proximal and distal endites of praecoxa with 3 and 2 setae, respectively; proximal and distal endites of coxa with 2 and 3 setae, respectively; those of basis with 3 and 2 setae, respectively; endopod with 4 setae.
- Mxp praecoxal endites of syncoxa lacking setae; coxal endite with 1 seta; allobasis with 1 seta arising in the middle part of segment and 2 setae locared distally; endopod 3-segmented, its segments have 1, 3, and 2 setae, respectively.
- P1 exopod 3-segmented, each segment with 1 external spine.
- P2 endopod 2-segmented.
- P3-P4 endopods 3-segmented, 3rd segment bears 6 setae.

Male unknown.

For Markhaseva, the new genus shows more morphological similarities to genera Foxtonia and Sognocalanus.

[1] Foxtosognus rarus  Markhaseva, 2008   (F)    [Figs]
(5) Sognocalanus Fosshagen, 1967
Rem.: Formerly included in the Bathypontiidae family, but considered by Markhaseva (2008) as belonging to the family Arctokonstantinidae.
Total: 1 sp.

[1] Sognocalanus confertus  Fosshagen, 1967   (F,M)    [Figs]

 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., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at [Accessed May 30, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

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


Version française
English version



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