Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Cenognatha ( Genus )
Cenognatha antarctica  (Hulsemann, 1985)   (F, Juv.M)
Syn.: Neoscolecithrix antarctica Hulsemann, 1985 (p.55, Descr., figs. C5, F & M); Razouls & al., 2000 (p.343, tab. 2, Appendix); Boxshall & Halsey, 2004 (p.191, fig.F)
Bradford-Grieve, 2001 a (p.792, Rem.); Bradford-Grieve, 2004 (p.285)
Species Cenognatha antarctica - Plate 1 of morphological figuresissued from : K. Hulsemann in Polar Biol., 1985,5. [p.57, Figs.1-7]. As Neoscolecithrix antarctica.
Female (from W Weddell Sea): 1-2, habitus (dorsal and lateral, respectively); 2-4, urosome (dorsal and lateral, respectively); 5, genital segment (ventral); 6, anal segment and caudal rami (ventral); 7, forehead (ventral).
Scales in mm.
Nota: Head and 1st pedigerous segment fused, 4th and 5th separate. The posterolateral margin of the last segment carries 2 posteriad directed points separated by a wide gap. Simple rostrum with 2 prongs drawn out into filaments. Ratio of lengths Prosome/Urosome = 3.30. Urosome 4-segmented; a row of short hairs accompanies the posterior margins of urosomal segments 1-3; in addition, there are ventro-lateral patches of hair and lateral patches of spinules on the genital segment. Anal segment short. Length of caudal ramus nearly twice its width. A1 24-segmented

Species Cenognatha antarctica - Plate 2 of morphological figuresissued from : K. Hulsemann in Polar Biol., 1985,5. [p.58, Figs.8-15]. As Neoscolecithrix antarctica.
Female: 8, A2; 9, Md (mandibular palp); 10, Md (mandibular blade); 11, Md (cutting edge); 12, Mx1; 13, Mx2; 14, Mx2 (5th lobe); 15, Mxp.
Scales in mm.
Nota: Posterior side of the 1st basipodal segment of A2 with a patch of hair-like setae; the inner lobe of the 2nd segment of the endopod with 8 setae, the outer lobe 7 setae. The 1st inner lobe of Mx1 is armed with 9 strong and 4 slender spines. 3 setae on the 2nd inner lobe; 4 on the 3rd inner lobe; 5 on the 2nd basal segment; 3, 3, 5 on endopodal segments 1-3; 9 each on the exopod and the outer lobe, respectively. Lobe 1 of Mx2 with 5 setae, and lobes 2-4 each with 1 short and 2 long setae; lobe 5 carries a strong spine in addition to 3 setae of which the 2 shorter ones appear to be modified to sensory filaments; from the endopodal segments originate 2 types of sensory appendages: there appear to be 4 with a small apical \"brush\" and 3 which are larger and undifferenciated. Of the 6 setae on 1st basipodal segment of Mxp, 2 are modified to filamentous sensory structures; endopodal segments 1-5 armed with 4, 4, 3, 3+1 and 3.1 setae, respectively.

Species Cenognatha antarctica - Plate 3 of morphological figuresissued from : K. Hulsemann in Polar Biol., 1985,5. [p.59, Figs.16-21]. As Neoscolecithrix antarctica.
Female: 16-18, P1 to P3; 19, left P4 (posterior face); 20, P5 (anterior face); 21, right P5 (posterior face).

Copepodid female stage V: 22, P5 (posterior face.

Copepodid Male stage V: P5 (posterior face.
Scales in mm.

Species Cenognatha antarctica - Plate 4 of morphological figuresissued from : K. Hulsemann in Polar Biol., 1985,5. [p.61, Table 2]. As Neoscolecithrix antarctica.
Selected characters in females. B = basipod; Ri = endopod; Re = exopod.

Compl. Ref.:
Hopkins (1985)
NZ: 1

Distribution map of Cenognatha antarctica by geographical zones
Antarctic: Peninsula (SW Atlant.: Antarctic Sound, Croker Passage)
N: 2
(584) F: 2,32; juv.5 M: 1,82-1,66; {F: 2,32}
Rem.: epi-bathypelagic.
According to Vyshkvartzeva (2000, p.217) this species should belong to the Scolecitrichidae.
Last update : 31/12/2014
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 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., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed January 27, 2023]

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Marine Planktonic Copepods

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