Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Scolecitrichopsis ( Genus )
Scolecitrichopsis alvinae  (Grice & Hulsemann, 1970)   (F)
Syn.: Xanthocalanus alvinae Grice & Hulsemann, 1970 (p.189, Descr.F, figs.F); Bradford & al., 1983 (p.71, 104); Bradford-Grieve, 2004 (p.284)
Vyshkvartzeva, 1999 (2000) (p.221)
Species Scolecitrichopsis alvinae - Plate 1 of morphological figuresIssued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp.Zool., Harvard, 1970, 139 (4). [p.202-203, Pl. III Figs. 41-54]. As Xanthocalanus alvinae.
Female (from 39°45.2'N, 70°33.8'W): 41,nhabitus (dorsal); 42, Md palp; 43, Md (masticatory edge); 44, Mx1; 45, Mx2; 46, Mxp; 47, P1; 48 P2; 49, P3 (exopod broken off); 50, P3 ( exopoid of another specimen); 51, P4 ( exopod and endopod broken off); 52, P4 (2nd and 3rd endopodal segments of another specimen); 53, P5; 54, P5 (another specimen).

Nota: - Head and 1st thoracic segment fused, biut trace of segmentation visible; 4th and 5th thoracic segments separate.
- Abdomen 4-segmented.
- Anal segment very short.
- Rostrum with 2 filaments of moderate length.
- Posterolateral corner of 5th thoracic segment angular, little produced.
- A1 23-segmented, segments 8-10 and 24-25 fused; reaching end of 3rd abdominal segment.
- Exopod of A2 7-segmented, slightly longer than endopod.
- Basal segment of Md palpus carrying 3 setae, mandible blade with rather simple teeth.
- 2 setae on 2nd inner lobe of Mx1, 4 setae on 3rd inner lobe, 4 setae on 2nd basal segment, 2 and 5 setae on endopod, 7 setae on exopod.
- Mx2: 3 setae on 1st lobe, 2nd to 4th lobes with 2 setae, 5th lobe with 3 setae, one of them spine-like, and 1 sensory appendage; endopod carrying sensory filaments.
- Endopod of P1 1-segmented.
- Endopod of P2 to P4 2-segmented.
Exopods of P1 to P3 3-segmented, exopod of P4 broken.
- Posterior sides of both rami of P2 and P3 spinulose, of endopod of P4 covered with hair-like spines.
- P5 composed of 3 segments of about equal length equipped with conspicuous hair and spinules; 2nd segment slightly wider than long, distal segment carrying 1 external, 1 internal, and 1 terminal spine, the latter being the shortest. One female had 2 terminal spines; internal spine strong exceeding distal segment in length, directed more or less at right angle to segment.

Species Scolecitrichopsis alvinae - Plate 2 of morphological figuresIssued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp.Zool., Harvard, 1970, 139 (4). [p.200-201, Pl. II, Figs.36-40]. As Xanthocalanus alvinae.
Female: 36, 4th and 5th thoracic segments and urosome (lateral); 37, Forehead (lateral); 38, 4th and 5th thoracic segments and urosome (dorsal); 39, rostrum (ventral); 40, A2.

Compl. Ref.:
Kosobokova & al., 2011 (p.29, Table 2, Rem.: Nansen Basin)
NZ: 2

Distribution map of Scolecitrichopsis alvinae by geographical zones
off S Woods Hole, Nansen Basin, Laptev Sea (in Sirenko & al., 1996, p.349)

Type locality: 39°45.2' N, 70°33.8' W.
N: 4
(200) F: 2,34-2,1; {F: 2,10-2,34}
Rem.: bathypelagic, hyperbenthic.
For Grice & Hülsemann (1970, p.189) this species closely resembles X. echinatus Sars.
Last update : 07/03/2015
    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., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed October 01, 2023]

© copyright 2005-2023 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