List species and varieties by family
Rostrocalanidae Markhaseva, Schulz & Martinez Arbizu, 2008 ( Clausocalanoidea )
(1) Rostrocalanus Markhaseva, Schulz & Martinez Arbizu, 2008
Rem.: Type: Rostrocalanus peracutus. Total: 2 spp.

Diagnosis from Markhaseva & al; (2008, p.2421):
Female:
- Cephalosome and 1st pediger fused, 4th and 5th incompletely separate.
- Rostrum large, as rounded plate without filaments.
- Prosome 3.4-5.1 times longer than urosome.
- Posterior corners of prosome prolonged and obtusely rounded or acutely pointed.
- A1 24-segmented.
- A2 coxa without seta; basis with 1 small vestigial seta; endopodal segment 1 with 1 seta; exopod 7-segmented with 0, 3, 1, 1, 1, 0 and 3 setae.
- Gnathobase of Md with keel, cutting edge bearing 4 to 5 teeth, 1 fork-like distally and tipped with 3 to 4 points; endopodal segment 1 without seta, endopodal segment 2 with 6 setae; basis with 2 setae, one very small; exopod 4-segmented with 1, 1, 1 and 1 setae.
- Praecoxal endite of Mx1 with 9 terminal elements, four or five of them as thick spines, other setae modified (with swollen headsà or not; coxal endite with 2 setae, coxal epipodite with 3 to 4 setae, or setae absent; proximal basal endite with 2 setae; distal basal endite fused to endopod, with 5 setae ( setal affiliation obscure); exopod with 5 or 6 setae.
- Proximal praecoxal endite of Mx2 with 1 or 2 setal elements, distal with 3 setae; proximal and distal coxal endites with 3 setae each; proximal basal endite with 4 setae; endopod apparently 3-segmented, with 6 long and slender worm-like sensory setae.
- Syncoxa of Mxp without seta on proximal praecoxal endite, with 1 seta on middle endite and 2 setae on distal praecoxal endite; coxal endite bearing 2 setae. Setae of praecoxal endites poorly sclerotized but not aesthetasc-like; basis with 2 medial setae, distal setae absent; endopod 5-segmented with 3, 2, 2, 3+1, 4 setae.
- P1 basis with or without medial distal seta; lateral lobe of endopod moderately developed.
- P5 uniramous, 2-segmented; distal segment with 3 spine-like unarticulated extensions terminally.

Males unknown.

[1] Rostrocalanus cognatus  Markhaseva, Schulz & Martinez Arbizu, 2008   (F)    [Figs]

[2] Rostrocalanus peracutus  Markhaseva, Schulz & Martinez Arbizu, 2008   (F)    [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 http://copepodes.obs-banyuls.fr/en [Accessed March 28, 2024]

© copyright 2005-2024 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