Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Tortanidae ( Family )
            Tortanus ( Genus )
                Atortus ( Sub-Genus )
Tortanus (Atortus) tropicus  Sewell, 1932   (F,M)
Ref.:
Sewell, 1932 (p.400, figs.F,M); 1948 (p.324); Bowman, 1971 a (p.527); Silas, 1972 (p.650); Francis & Bijoy Nandan, 2019 (p.433, Table 4, 5).
Species Tortanus (Atortus) tropicus - Plate 1 of morphological figuresIssued from : R.B.S. Sewell in Mem. Indian Mus., 1932, X (continued). [p.402, fig.131].
Female (from Nicobar Is.): a, habitus (dorsal); b, Md; c, Mx1; d, Mxp; e, P5.

Male: f, grasping A1; g, P5.


Species Tortanus (Atortus) tropicus - Plate 2 of morphological figuresIssued from : S.V. Francis & S. Bijoy Nandan in Turkish J. Zool., 2019, 43. [p.434, Table 4].
Differential diagnosis of T. tropicus female. Compare with other species of the subgenus Atortus species from the Indian Ocean.

Morphological characters female:
- Genital compound somite with a small bulge on the left side. Caudal rami asymmetrical with left ramus stouter and right ramus slightly curved. P5 with spine at distal end.


Species Tortanus (Atortus) tropicus - Plate 3 of morphological figuresIssued from : S.V. Francis & S. Bijoy Nandan in Turkish J. Zool., 2019, 43. [p.435, Table 5].
Differential diagnosis of T. tropicus male. Compare with other species of the subgenus Atortus species from the Indian Ocean.

Morphological characters female:
- Right P5 basis bearing small rounded process.

Compl. Ref.:
Othman, 1987 (p.72); Ohtsuka, 1992 a (p.265); Nishida & Cho, 2005 (p.232, Fig.4: chart); Maiphae & Sa-ardrit, 2011 (p.641, Table 2, 3, Rem.)
NZ: 1

Distribution map of Tortanus (Atortus) tropicus by geographical zones
Loc:
NE Indian (Octavia Bay, Nankauri Harbour), Andaman Sea
N: 2
Lg.:
(44) F: 2,71; M: 2,289; {F: 2,71; M: 2,29}
Rem.: in surface tow-net.
For Nishida & Cho (2005, p.229) this species belongs in the subgenus Atortus to the ''species complex tropicus''.
Last update : 11/02/2020
    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 18, 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