Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Omorius ( Genus )
Omorius curvispinus  Markhaseva & Schulz, 2007   (F)
Markhaseva & Schulz, 2007 (p.743, figs.F)
Species Omorius curvispinus - Plate 1 of morphological figuresissued from : E.L. Markhaseva & K. Schulz in J. Nat. Hist., 2007, 41 (13-16). [p.743, Fig.8]
Female (60°38'S, 53°57'W): A, habitus (dorsal); B, anterior part of cephalosome (lateral); C, rostrum (ventral); D, posterior prosome and urosome (lateral); E, posterior prosome and genital double-somite (right lateral); F, urosome (dorsal); G, genital double-somite (ventral); H, anal somite and caudal rami (ventral; setae partly detached).
Scale bars: 0.1 mm.

Nota : Prosome about 4.6 times longer than urosome. Rostrum witout filaments. Cephalosome and pediger 1 separate, 4th and 5th separate. Right posterior corner of prosome rounded with small knob ventrally. In dorsal view, genital double-somite slightly swollen at mid-length, lateral surfaces with denticles, spermathecae small, oblong. Caudal rami with 4 terminal setae, 1 small dorsal and 1 small ventral seta.

Species Omorius curvispinus - Plate 2 of morphological figuresissued from : E.L. Markhaseva & K. Schulz in J. Nat. Hist., 2007, 41 (13-16). [p.745, Fig.9]
Female: A, A1 (segments 1 (ancestral segment I) to 8 (ancestral segments X-XI); B, A2 (coxa); C, idem (basis and endopod); D, idem (exopod); E, Md (mandibular palp); F-G, Md (gnathobase; different positions); H, Mx1 (posterior view); I, P5 (posterior view); J, Mx1 (praecoxal endite; posterior view).
Scale bars: 0.1 mm.

Nota : broken. A2 : coxa with 1 seta ; basis with 2 setae (1 very long) ; endopodal segment 1 with with 2 setae, 2nd with 7 and 8 setae ; exopod 8-segmented with 1, 2, 2,1, 1, 1, 1, and 3 setae (3rd proximal segment small, incompletely separate from 2nd segment). Md gnathobase with tooth-like knob on posterior face and wide cutting edge, with 8 blunt teeth and 1 seta ; exopod 5-segmented ; endopod 2-segmented with 2 and 9 setae, respectively. Mx1 : praecoxal endite with 9 terminal and 4 posterior setae ; coxal endite with 2 setae, coxal epipodite with 9 setae ; proximal basal endite with 2 setae, distal basal endite ; endopod with 7 setae ; exopod with 4 setae and small spinules distally.with 3 setae

Species Omorius curvispinus - Plate 3 of morphological figuresissued from : E.L. Markhaseva & K. Schulz in J. Nat. Hist., 2007, 41 (13-16). [p.746, Fig.10]
Female: A, Mx2 (posterior view); B, Mx2 (sensory setae of distal basal endite plus endopod (anterior view)); C, Mxp (syncoxa); D, Mxp (basis and endopod; E, P1 (anterior view).
Scale bars: 0.1 mm.

Nota : Mx2 : proximal praecoxal endite with 4 setae and short triangular attenuation, distal endite with 3 setae ; proximal coxal endite with 3 setae, distal endite with 3 setae (1 long, thick and spine-like and 1 worm-like sensory seta) ; all endites with small spinules distally ; distal basal endite plus endopod with 8 sensory setae (5 worm-like and 3 brush-like). P1 : coxa with row of small denticles along distal outer edge ; basis with tiny distolateral seta and mediodistal seta on anterior face ; endopod1-segmented, lateral lobe small, triangula rand lacking denticles, spinules present along distolateral edge.

Species Omorius curvispinus - Plate 4 of morphological figuresissued from : E.L. Markhaseva & K. Schulz in J. Nat. Hist., 2007, 41 (13-16). [p.747, Fig.11]
Female: A-C, P2 to P4 (incomplete; all posterior views).
Scale bar: 0.1 mm.

NZ: 1

Distribution map of Omorius curvispinus by geographical zones
Antarct. (Scotia Sea)
N: 1
(969) F: 1,86; {F: 1,86}
Rem.: hyperbenthic; bathypelagic (2889-2893 m).
Last update : 26/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed November 30, 2023]

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