Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Amallothrix ( Genus )
Amallothrix sp.  Roe, 1975   (M)
Roe, 1975 (p.327, Descr.M, figs.M)
Species Amallothrix sp. - Plate 1 of morphological figuresissued from : H.S.J. Roe in Bull. British Mus. (Natural History) Zool., London, 1975, 28 (7). [p.328, Fig.16].
Male (from Cape Verde Islands): a, habitus (dorsal); b, forehead and rostrum (left lateral side); c, A2; d, mandibular palp; e, Mx1; f, Mx2 (endopod); g, P1; h, P2; i, P3; j, P4; k, P5; l, P5 (last exopodite segment left leg); m, P5 (terminal segments from different specimen).
Bar scale 0.1 mm unless indicated.
Nota: Cephalothorax 2.5 times as long as the 5-segmented abdomen.
Head and 1st thoracic segment fused, 4th and 5th fused.
Rostrum with 2 stout filaments.
A1 19-segmented, reaches to the hind edge of the 2nd abdominal segment.
There is some slight variation in setation of Mx1 where one specimen has 9 setae on the exopodite.
P5 reaches back about half the length of the abdomen; on the left side the exopodite is slightly longer than the endopodite and the last exopodite segment has a lamella and groups of coarse setae.

NZ: 1

Distribution map of Amallothrix sp. by geographical zones
NE Atlant. (Cape Verde Is.)
N: 1
(8) M: 2,81-2,05; {M: 2,05-2,81}
Rem.: meso-bathypelagique (depth: 1220-610 m).
According to Roe (1975, p.328-329) this form is similat to the male of Amallothrix propinqua (as Scolecithricella propinqua in Tanaka, 1962, p.63), but differ in the spinulation of the swimming legs and in the structure of P5. This form agrees with Bradford's (1973) redefinition of Amallothrix, but as it may be an undescribed male of a known species, there is not considered to be a new species.
Last update : 29/12/2014
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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 24, 2024]

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Marine Planktonic Copepods

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