Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Centropagidae ( Family )
            Isias ( Genus )
Isias uncipes  Bayly, 1964   (F,M)
Syn.: Isias uniceps : Pillai P., 1975 a (p. 325, Table 1)
Ref.:
Bayly, 1964 b (p.239, figs.F,M); Greenwood, 1977 (p.64); 1982 (p.220); Bradford-Grieve,1999 b (p.145, figs.F,M, figs.181, 192)
Species Isias uncipes - Plate 1 of morphological figuresissued from : I.A.E. Bayly in Aust. J. Mar. Freshw. Res., 1964, 15. [p.241, Fig.1].
Female (from Brisbane River estuary): A, P2; B, P1; C, P4; D, P5; E, right ventro-lateral aspect of urosome segments 1-3; F, ventral aspect of urosome; G, A2.

Nota: A1 24-segmented, reaching about half-way along urosome.
- Exopodite of A2 distinctly 7-segmented.
- Urosome 3-segmented.
- Genital segment about as long as segments 2 and 3 combined, produced posteriorly into broad tongue-like flap, twisted to right, extending 0.7 times distance from anterior to posterior edge of segment 2 and overlying much of its ventral surface; posterior margins of segments 2 and 3 smooth.
- Caudal rami about 3.5 times as long as wide.


Species Isias uncipes - Plate 2 of morphological figuresissued from : I.A.E. Bayly in Aust. J. Mar. Freshw. Res., 1964, 15. [p.242, Fig.2].
Male: A, anterior aspect of P5; B, C, posterior aspect of right (R) and left (L) P5; D, dorsal aspect of segments 17-21 of right A1; E, dorsal aspect of urosome.

Nota: Urosome segments 2-4 with a row of irregular spines along posterior margin.
- Caudal rami about 3.5 times as long as wide.
- Right A1 21-segmented (hinged between segments 18 and 19, segments 17-21 armed with rows of small teeth).
- P5 left and right basipod 1 segments fused. The right basipod 2 produced at the inner distal corner into a huge recurved hook which is curved outwards. A vestigial endopod in the form of a small unsegmented structure with a proximally pointing hook is present at base of exopod. Right exopod 2-segmented; segment 1 about 3 times as long as wide and with a1 single spine near outer distal corner; segment 2 of complex shape, its long axis inclined at an angle of 30° to that of segment 1 and apparently attached to the inner distal corner of the segment 1 half-way along its outer edge, distal half of segment with 2 outer spines and 2 terminal spines of unequal size, larger terminal spine serrated along outer edge. Left basipod 2 with a long styliform process arising from inner anterior proximal corner. Left exopod 2-segmented; segment 1 with 1 single spine at outer distal corner; segment 2 bent back on to inner edge of segment 1, with 6 spines, 4 on outer edge, 1 subterminal and 1 posterior face just short of distal extremity, distal outer spine much stouter than the remaining, subterminal claw-like spine has a sharp angular bend, posterior spine has a right-angle bend. A vestigial left endopod present near inner junction of exopod and basipod 2 on its anterior face; it is constricted or segmented about half-way along its length, with its distal half forming a small subspherical knob.


Species Isias uncipes - Plate 3 of morphological figuresIssued from : P.P. Pillai in Bull. Dept. Mar. Sci. Univ. Cochin, 1975, VII (2). [p.326, Table I].
Setal formulae of certain appendages in Isias uniceps (= I. uncipes).
Spines = Roman numerals; setae = Arabic numerals.

NZ: 1

Distribution map of Isias uncipes by geographical zones
Loc:
Australia (Moreton Bay, Brisbane River)
N: 3 (Pacif.: 3)
Lg.:
(361) F: ± 1,53; M: ± 1,57; {F: 1,53; M: 1,57}
Rem.: Brackish waters.
Last update : 01/03/2016
    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., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed July 02, 2022]

© copyright 2005-2022 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