Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Chirundina ( Genus )
Chirundina alaskaensis  (Tanaka, 1969)   (F)
Syn.: Wilsonidius alaskaensis Tanaka, 1969 (p.268, figs.F); Bradford & Jillett, 1980 (p.92)
Markhaseva, 1996 (p.130, figs.F)
Species Chirundina alaskaensis - Plate 1 of morphological figuresissued from : O. Tanaka in Publ. Seto Mar. Lab., 1969, XVII (4). [Fig.8]. As Wilsonidius alaskaensis.
Female (from G. of Alaska): a, habitus (lateral left side); b, forehead (dorsal); c, last thoracic segment and urosome (dorsal); d, A1; e, A2; f, Md.

- Cephalothorax slightly less than 3 times longer than abdomen (74 : 26).
- Head and 1st pedigerous segment fused, 4th and 5th pedigers fused (with a line of demarcation between the 4th and 5th thoracic segments along the lateral margins)
- Forehead produced in dorsal view , broadly rounded in lateral view.
- Posterolateral corners of the last thoracic segment narrowly rounded but irregular in outlin9 : 13 : 5 : e at the apex.
- Rostrum 1-pointed and long, directing downwards.
- Abdomen 4-segmented; segments and caudal rami in proportional lengths 45 : 19 : 13 : 5 : 18 = 100.
- Genital segment symmetrical, dilated posteriorly, swollen considerably ventrally.
- 2nd and 3rd abdominal segments fringed with fine spinules on distal margin.
- Caudal rami as lonf as wide, with a small lateral spine, 4 long setae and 1 appendicular seta.
- A1 24-segmented, extending to the end of the 2nd abdominal segment.
- A2 with exopod 7-segmented , about1.5 times as long as the endopod; 1st exopodal segment furnished with a small seta on the inner distal margin; 2nd segment with 2 small setae on the inner proximal margin and 1 small spine at the inner distal margin; 3rd to 6th segments furnished with 1 long seta respectively, 7th segment with 3 terminal and 1 inner marginal setae; distal endopodal segment with 8 setae on the inner lobe and 7 setae on rhe outer lobe.
- Md palp elongate, furnished with 3 inner marginal setae; exopod 5-segmented with 6 setae in all; 1st endopodal segment with 2 marginal setae, distal segment with 10 setae; Cutting blade with 8 teeth and an inner marginal seta.

Species Chirundina alaskaensis - Plate 2 of morphological figuresissued from : O. Tanaka in Publ. Seto Mar. Lab., 1969, XVII (4). [Fig.9]. As Wilsonidius alaskaensis.
Female: a, Mx1; b, Mx2; c, Mxp; d, P1; e, P2; f, P4.9 setae

Nota: Mx1 with 9 setae on outer lobe; 11 setae on exopod; 6+5+4 setae on the 3rd to 1st endopodal segments; 5 setae on the basal segment; 4 setae on the 3rd inner lobe; 5 setae on the 2nd inner lobe; 14 setae on the 1st inner lobe (= arthrite).
- Mx2 with the 1st basal segment swollen on the proximal outer margin; 1st to 5th inner lobes (= endites) furnished with 3 setae respectively; endopod with 6 setae.
- Mxp with the 2nd basal segment 2 times as long as the 1st basal segment, striated with a lamellous plate along the outer margin; endopod with short segments and furnished with 4 , 3, 3, 3+1 and 3+1 setae on the 1st to 5th segments.
- P1 exopod 3-segmented and endopod 1-segmented

Species Chirundina alaskaensis - Plate 3 of morphological figuresChirubdina alaskaensis/em> female:
1 - Crest on cephalon absent.

Species Chirundina alaskaensis - Plate 4 of morphological figuresissued from : O. Tanaka in Publ. Seto Mar. Lab., 1969, XVII (4). [p.268]. As Wilsonidius alaskaensis.
Female A1.

Compl. Ref.:
Galbraith, 2009 (pers. comm.)
NZ: 1

Distribution map of Chirundina alaskaensis by geographical zones
SE Gulf of Alaska (coastal), Vancouver Is.

Type locality: 55°35'N, 132°33'W.
N: 2
(105) F: 3,7; {F: 3,70}
Rem.: Mesopelagic.
Last update : 28/03/2017
    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