Species Card of Copepod
Calanoida ( Order )
    Ryocalanoidea ( Superfamily )
        Ryocalanidae ( Family )
            Ryocalanus ( Genus )
Ryocalanus bowmani  Markhaseva & Ferrari, 1996   (M)
Markhaseva & Ferrari, 1996 (p.66, Descr.M, figs.M); Boxshall & Halsey, 2004 (p.184, p.183: fig.M); Renz & al., 2013 (p.257)
Species Ryocalanus bowmani - Plate 1 of morphological figuresissued from : E.L. Markhaseva & F.D. Ferrari in Zoosyst. Rossica, 1995 (1996), 4 (1). [p.68, Fig.29-34].
Male (from 13°23.9'N, 102°35'W): 29-30, habitus (dorsal and lateral, respectively); 31, rostrum (ventral); 32-33, last segment of prosome and urosome (dorsal and right lateral, respectively); 34a, A1 (1st-14th segments); 34b, A1 (15th-24th segments).
Scale bars: 0.1 mm.

Nota : Prosome nearly 5.6 times as long as urosome. Rostrum one-pointed. Posterior corners of the last segment of prosome rounded, reaching the posterior border of genital segment. Genital segment slightly asymmetrical. Caudal ramus with 4 large apical setae, 1 small lateral seta. Left A1 25-segmented (8th and 9th segments partly fused) ; right A1 geniculated, 25-segmented (all segments inflated), with 8th-9th segments fused, ; 3 segments proximal to the geniculation each have a thick and stiff proximal seta, the 2 segments distal to the geniculation each have comb spines.

Species Ryocalanus bowmani - Plate 2 of morphological figuresissued from : E.L. Markhaseva & F.D. Ferrari in Zoosyst. Rossica, 1995 (1996), 4 (1). [p.69, Figs.35-40].
Male: 35, A2; 36, Md (mandibular palp); 37, Mx1; 38, Mx2; 39, Mxp; 40a, left P5; 40b, right P5.

Nota : A2 exopod nearly as long as endopod ; coxopodite with 1, basipodite with 2 setae ; exopodite 1 with 1, exopodite 2 with 3 setae ; endopodite 1 with 2 distal setae and hairs on internal side and endopodite 2 with 6 setae at external and 8 terminal and 1 posterior setae at internal lobe. Md palp base with 3 setae ; endopodite 1 with 4 setae, endopodite 2 with 10 setae. Mx1 gnathobase with 7 apical thick spines, 2 subapical spines, 1 short thin apical seta, 1 anterior seta and 4 posterior setae ; 2nd and 3rd internal lobes with 6 and 4 setae respectively ; basis and endopod have 21 setae ; exopod with 10 setae, and external lobe with 6 setae. Mx2 first endite with 5 setae, 2 nd to 4th endites with 3 setae each, 5th endite with 4 setae, one of which is thickened into spine, 6th endite with with 2 setae (1 long and 1 short), and terminal part with 5 long thick setae plus 1 short thin seta proximal to the thick ones. Mxp syncoxa with 8 setae, basis with 3 setae

Species Ryocalanus bowmani - Plate 3 of morphological figuresissued from : E.L. Markhaseva & F.D. Ferrari in Zoosyst. Rossica, 1995 (1996), 4 (1). [p.70, Figs.41-44].
Male: 41-44, P1 to P4

  Species Ryocalanus bowmani - Plate 4 of morphological figures  
Compl. Ref.:
Bradford-Grieve, 2004 (p.283)
NZ: 1

Distribution map of Ryocalanus bowmani by geographical zones
NE Pacif. (E off Clipperton Is.)
N: 1
(522) M: 1,9; {M: 1,90}
Rem.: hyperbenthic (3100-3022 m).
Last update : 30/03/2019
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed December 09, 2022]

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Marine Planktonic Copepods

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