Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Aetideus ( Genus )
Aetideus pseudarmatus  Bradford, 1971   (F)
Syn.: ? Aetideus armatus (part.) Brady,1883 (p.76)
Bradford, 1971 (p.23, Descr.F, figs.F); Bradford & Jillett, 1980 (p.14, figs.F, fig. 73, distribution chart); Razouls, 1994 (p.64, figs.F); Markhaseva, 1996 (p.24, figs.F,Rem.); Bradford-Grieve & al., 1999 (p.879, 920, figs.F)
Species Aetideus pseudarmatus - Plate 1 of morphological figuresissued from : Bradford J. in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1) [p.23, Fig.8].
Female (from SW pacific): 7, 8, habitus (lateral, dorsal); 9, 9', Rostrum (variability); 10, distal part of metasome and genital segment (latera right sidel).

Nota: Seminal receptacles with a long uniformly narrow tube, at least 5 times as long as wide. Mouth parts and swimming legs identical with those of A. armatus.

Species Aetideus pseudarmatus - Plate 2 of morphological figuresissued from : J.M. Bradford & J.B. Jillett in Mem. N.Z. Oceanogr. Inst., 86, 1980. [p.18, Fig.8].
Female: A, lateral right side); B, idem (dorsal); C, rostrum; D, genital segment (lateral right side).

Species Aetideus pseudarmatus - Plate 3 of morphological figuresissued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1). [p.18, Fig.4, a]. [modified C.R]
Rostrum width : depth plotted against rostrum depth (c) for Aetideus pseudarmatus. SA: Southern African specimens.
Compare with A. australis, A. truncatus, A. divergens and A. armatus.

Species Aetideus pseudarmatus - Plate 4 of morphological figuresAetideus pseudarmatus female:
1 - Posterior corners of last thoracic segment prolonged into points.
2 - Posterior corners not prolonged into wing-like lobes. Points not reaching yje middle of urosomal segment 2. Anterior part of cephalon without crest.
3 - Basipodite of right P1 without external tooth-like projection distally. Coxopodite of P4 usually with spinules near the base of internal seta.
4 - Points of posterior corners reaching or exceeding posterior border of genital segment.
5 - Spermatheca with long duct connecting its dorsal and ventral parts.

Compl. Ref.:
Razouls & al., 2000 (p.343, tab. 3, Appendix); Bradford-Grieve, 2003 (p.96, tab.1)
NZ: 3

Distribution map of Aetideus pseudarmatus by geographical zones
Species Aetideus pseudarmatus - Distribution map 3issued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1). [p.34, Fig.13].

Southwest Pacific Ocean showing distribution of four Aetideus species.
sub-Antarct. (SW Africa, off Kerguelen: station Kerfix: 50° 40' S, 68° 25' E, SW Pacif.), New Zealand (SW, SE North Island).

Type locality: 46°46'S, 164°35'E.
N: 4
(37) F: 1,8-1,65; (204) F: 1,78; {F: 1,65-1,80}
Rem.: epi & mesopelagic.
Sampling depth (sub-Antarct.) : 0-200 m.
Species similar to A. armatus. See notes in Markhaseva (1996, p.24).
For Bradford (1971, p.24) this species is distinguished from A. armatus and A. autralis
Last update : 27/12/2014
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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 25, 2024]

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