Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Pseudochirella ( Genus )
Pseudochirella semispina  Vervoort, 1949   (F)
Syn.: Pseudeuchirella semispina : Björnberg, 1973 (p.325, 388)
Vervoort, 1949 (p.44, figs.F); Tanaka & Omori, 1969 a (p.169, Rem.); Bradford & Jillett, 1980 (p.67); Markhaseva, 1989 (p.58); 1996 (p.253)
Species Pseudochirella semispina - Plate 1 of morphological figuresIssued from : W. Vervoort in Zool. Verh., Leiden, 1949, 5. [p. 45, Fig.20]
Female (from Moluccan Sea): a, forehead (lateral); b, idem (abnormal female); c, urosome (dorsal); d, idem (lateral right side); e, idem (lelt side).

Nota: Head and 1st thoracic segment separated, 4th and 5th separated. The abdominal segments and furca in the proportional lengths 44:22:15:8:11 = 100. A1 (24 free segments) reaches the middle of the abdomen. A2: internal lobe of the 2nd endopodal segment with 8 setae, external lobe with 7 setae; the 1st and 2nd endopodal segments are separated.

Compl. Ref.:
Grice & Hulsemann, 1967 (p.15)
NZ: 3

Distribution map of Pseudochirella semispina by geographical zones
Species Pseudochirella semispina - Distribution map 2Issued from : E.L. Markhaseva in Issled. Fauny Morei, 1989, 41 (49). [p.58, Fig.15].
Geographical distribution of P. semispina from literature.
W Indian, Molucca Sea, Timor Sea , Arafura Sea, Peru
N: 3
(41) F: 5,85-5,5; {F: 5,50-5,85}
Rem.: The species resembles P. gibbera and P. notacantha. From the former it differs distinctly by the shape of the abdomen; the latter has the lateral spine on both sides of the lateral thoracic margin (the presence of the right spine only for 4 females of P. semispina is not due to damage).
Markhaseva (1996, p.294) remarks that Tanaka & Omori (1969) noted close connection between this species and P. vervoorti Vervoort, 1949, but distinguished the species in segmentation of P2 endopod (1-segmented in P. semispina vs 2-segmented in P. vervoorti), in highter number of spines on coxopodite of P4 (7-8 in P. semispina vs 9-12 in P. vervoorti), in different proportion of endopod and exopod of A2 (exopod 1.2 times endopod in P. semispina), and in different arrangement of hairs on genital segment.
Last update : 30/01/2015
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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]

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Marine Planktonic Copepods

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