Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Pseudotharybis ( Genus )
Pseudotharybis magnus  (Grice & Hulsemann, 1970)   (M)
Syn.: Aetideopsis magna Grice & Hülsemann, 1970 (p.188, Descr.M, figs.M)
Bradford, 1976 a (p.9); Bradford & Jillett,1980 ( p.74, 76: Rem.); Markhaseva & Schulz, 2008 (p.48, Rem)
Species Pseudotharybis magnus - Plate 1 of morphological figuresIssued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp. Zool., Harvard, 1970, 139 (4). [p.198-199, Pl. I, Figs. 3-19]. As Aetideopsis magna.
Male (from 39°45.2'N, 70°33.8'W): 3-4, habitus (dorsal and lateral, respectively); 5, 4th and 5th thoracic segment§s and 1st abdominal segment (lateral); 6, forehead (lateral); 7, rostrum (ventral); 8, right A1; 9, A2; 10, Md palp; 11, Mx1; 12, Mx2; 13, Mxp; 14, P1; 15, P2 (exopod broken short); 16, P3 (exopod and endopod broken short); 17, P4 (exopod broken short); 18, P5; 19, tip of left P5.

Nota: Head and 1st thoracic segment fused, 4th and 5th thoracic segments partially fused.
- Abdomen 5-segmented, 2nd segment largest, anal segment very short.
- Rostrum 2-pointed, small.
- Posterolateral margin of 5th thoracic segment more or less rounded with posteriorly directed small spine.
- A1 reaching 3rd thoracic segment. Rifgt A1 segments 8 and 9, 20 and 21 fused. Left A1 segments 8 and 8 only fused. Large aesthetascs on segments 2 to 9.
- Exopod of A2 shorter than endopod.
- Basal segment of Md palp devoid of setae. Md blade (= gnathobase) rudimentary.
- Mx1 and Mx2 reduced.
- 2nd basipodal segment of Mxp slender, slightly longer than the 1st.
- Endopod of P1 1-segmented, of P2 2-segmented, of P4 3-segmented. Exopod of P1 3-segmented, of other legs broken short;
Posterior side of P2 and P4 with patches of short hair.
- P5 asymmetrical, left side longer than right. Endopods slender, 1-segmented. Exopod of right P5 ending with slender point. 2nd exopodal segment of left P5 with setae distally, 3rd segment small with hair at tip.

Compl. Ref.:
Bradford-Grieve, 2004 (p.283)
NZ: 1

Distribution map of Pseudotharybis magnus by geographical zones
NW Atlant. (off Woods Hole).

Type locality: 39°45.2' N, 70°33.8' W.
N: 1
(200) M: 4,56-4,2; {M: 4,20-4,56}
Rem.: Bathyal (1750-1820 m), epibenthic.
The belonging to this genus was suggested by Bradford (1976 a). For Markhaseva & Schulz (2008, p.48) this form shares some characters with the male of Parabradyidius angelikae Schulz & Markhaseva, 2000; thus, until new morphological data of Aetideopsis magna are reported its taxonomic affiliation remains unsettled.
Last update : 20/04/2017
    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 May 25, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



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