Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Acartiidae ( Family )
            Acartia ( Genus )
                Acartia ( Sub-Genus )
Acartia (Acartia) nana  Brady, 1914   (F,M)
Ref.:
Brady, 1914 (p.6, figs.F,M); Steuer, 1923 (p.37, figs.F,M).
Species Acartia (Acartia) nana - Plate 1 of morphological figuresissued from : A. Steuer in Arb. zool. Inst. Innsbruck, 1923, 1 (5). [p.37, Figs.175 a', 175 a'', 175 a'''].
Female: 175 a', habitus (dorsal); 175 a'', P5.

Male: 175 a''', P5.


Species Acartia (Acartia) nana - Plate 2 of morphological figuresIssued from : G.S. Brady in Ann. Durban Mus., 1914, Vol. I. [Pl. II, figs. 7-12].
Female & male (from Durban Bay, Natal): 7, habitus (dorsal) of female; 8, A1; 9, Urosome of male; 10, terminal spine of one of the swimming feet; 11, P5 female; 12, P5 male.

Nota frmale.
- Cephalothorax widest in the middle, greatest width equal to 1/3 of the length and minutely spined at the lateral angle.
- Forehead narrowed and subtruncated.
- Urosome equal in length to 1/3 of metasome, first two segments nearly equal in lengths, last segment very small.
- Caudal rami slender, about equal in length to the median abdominal segment .
-,A1 scarcely at all nodulose or dentiferous, reaching to the middle of the urosome; 15-segmented, yje first ywo segments much the longest, median segments very indistincdtly marked, the last 6 or 7 quite distinctly separated.
- Terminal spines of the outer rami (= exopod) of the swimming feet very long and slender, their inner margins minutely pectinated along their entire length.
- P5 very small, basal segment expanded, sub-quadrate, bearing 2 setae, one of which is very long, the other rather shorter, bulbously expanded at its base, and minutely multifid toward the apex, which is produced into a delicate terminal seta.

Nota male:
- Urosome 4-segmented, each segment nearly equal length.
- Caudal segments (= rami) shorter and stouter, the terminal setae stouter and more divergent.
- P5 with basal portion divided as so to form a digitiform outer branch, which ends in a long terminal setae.

Compl. Ref.:
Sewell, 1948 (p.430).
NZ: 1

Distribution map of Acartia (Acartia) nana by geographical zones
Loc:
SE South Africa (Durban Bay)
N: 1
Lg.:
(164) F: 1; (1320) F: 1; {F: 1,00}
Rem.: Doubtful species. After Brady (1914, p.6) the animal is almost pellucid ; observation of P5 very difficult, and the author is not quite sure whether future research may altogether confirm the description.
Last update : 16/03/2021
    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., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed April 19, 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