Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Acartiidae ( Family )
            Acartia ( Genus )
                Acartia ( Sub-Genus )
Acartia (Acartia) nana  Brady, 1914   (F,M)
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
SE South Africa (Durban Bay)
N: 1
(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
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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 May 25, 2024]

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Marine Planktonic Copepods

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