Species Card of Copepod
Cyclopoida ( Order )
    Oithonidae ( Family )
        Oithona ( Genus )
Oithona parvula  (Farran, 1908)   (F)
Syn.: Paroithona parvula Farran, 1908 b (p.89, Descr.F, figs.F); Rosendorn, 1917 a (p.47, figs.F); Sars, 1918 (p.208, figs.F); Kiefer, 1929 g (p.11, Rem.F, fig.F); Rose, 1933 a (p.284, figs.F); C.B. Wilson, 1950 (p.285); Gundersen, 1953 (p.1, 26, seasonal abundance); Razouls, 1968 a (p.154, figs.F); Razouls, 1972 (p.95, Annexe: p.110, figs.F); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Shuvalov, 1980 (p.191, figs.F); Greze & al., 1985 (p.8); Ferrari & Böttger, 1986 (p.284, tab.2); Khelifi-Touhami & al., 2007 (p.327, Table 1); Ayon & al., 2008 (p.238, Table 4: Peruvian samples); Raybaud & al., 2008 (p.1765, Table A1); Mazzocchi & Di Capua, 2010 (p.428); Shiganova & al., 2012 (p.61, Table 4); Uysal & Shmeleva, 2012 (p.909, Table I); Selifonova, 2011 a (p.77, Table 1, alien species in Black Sea); Krsinic & Grbec, 2012 (p.57, 62: abundance);
? Paroithona sp. : Shmeleva, 1965 b (p.1350, lengths-volume -weight relation);
Ref.:
Boxshall & Halsey, 2004 (p.611: Rem.); Vives & Shmeleva, 2010 (p.67, figs.F, Rem.)
Species Oithona parvula - Plate 1 of morphological figuresissued from : G.O. Sars in An Account of the Crustacea of Norway. Vol. VI. Copepoda Supplement, Corrections and additions. Published by the Bergen Museum, 1918. [Pl. CXIV]. As Paroithona parvula.
Female (from Norway).
Nota: Exopodite of P4 with 1.1.1 outer edge spines on segments 1 to 3, respectively.


Species Oithona parvula - Plate 2 of morphological figuresissued from : I. Rosendorn in Wiss. Ergebn. dt. Tiefsee-Exped. \"Valdiviella\", 1917, 23. [p.47, Fig.27]. As Paroithona parvula.
Female: a, Md; b, exopod of P1; c, exopod of P2.
Nota: Proportion of lengths (p.cent) Prosome : 62.22, Urosome : 37.78 . Relative lengths of urosomal segments and caudal rami: 4 : 10 : 4.5 : 6 : 5. Setal formula of the exopod swimming legs P1 to P4 (Se = outer sete ; Si = inner setae), P1 : 1, 1, 2 Se ; 0, 1, 4 Si ; P2 : 1, 1, 2 Se ; 0, 1, 5 Si ; P3 : 1, 1, 2 Se ; 0, 1, 5 Si ; P4 : 1, 1, 1 Se ; 0, 1, 5 Si .


Species Oithona parvula - Plate 3 of morphological figures issued from : G.P. Farran in Fish. Ire. Sci. Invest., 1906, II [1908]. [Pl. X, Figs.1-13]. As Paroithona parvula.
Female (from W Ireland): 1, habitus (dorsal); 2, cephalon (lateral); 3, anal segment and caudal rami (dorsal); 4, A1; 5, A2; 6, Mx1; 7, P1; 8, P2; 9, Mxp; 10,Md; 11, Mx2; 12, P3; 13, P4.


Species Oithona parvula - Plate 4 of morphological figuresissued from : V.S. Shuvalov in Opred. Faune SSSR, Nauka, Leningrad, 1980, 125. [p.121, Fig.27, 10-18]. As Paroithona parvula.
Female: 10, prosome (dorsal); 11, urosome (dorsal); 12-13, forehead (dorsal and lateral, respectively); 14, Mx1; 15, Mx2; 16, Mxp; 17, A2; 18, P1.


Species Oithona parvula - Plate 5 of morphological figuresissued from : C. Razouls in Th. Doc. Etat Fac. Sc. Paris VI, 1972, Annexe. [Fig.65]. As Paroithona parvula.
Female (from Banyuls, G. of Lion): A, P2; B, P3; C, A1; D, P4; E, P1.

Compl. Ref.:
Sewell, 1948 (p.431, 461, 506); C.B. Wilson, 1950 (p.285); V.N. Greze, 1963 a (tabl.2); Shmeleva, 1963 (p.141); 1964 a (p.1068); Pavlova, 1966 (p.45); Kovalev & Shmeleva, 1982 (p.85); Hure & Krsinic, 1998 (p.103); Suarez-Morales & Gasca, 1998 a (p.112); Holmes & Gotto, 2000 (p.3, Rem.); Daly Yahia & al., 2004 (p.366, fig.4); Salah S. & al., 2012 (p.155, Tableau 1); Benedetti & al., 2016 (p.159, Table I, fig.1, functional characters)
NZ: 9

Distribution map of Oithona parvula by geographical zones
Loc:
off SW Cape of Good Hope, Morocco, off Cabo Finisterre, off W Hebrides Is., W Ireland (coast), off Bermuda (Station "S"), Sargasso Sea, Norway (Hundfjord, Bergen), Cap Ghir, Ibero-moroccan Bay, Medit. ( Alboran Sea, Gulf of Annaba, Banyuls, Adriatic Sea, G. of Manfredonia, Ionian Sea, Aegean Sea, Black Sea, Lebanon Basin), Indian (off N Amsterdam Is., off E & W Seychelles, Sumatra), Philippines, California (in Olson,1949), Peru (in Abanto, 2001)
N: 22 (SE Atlant. SE: 1; NE Atlant. : 5; Medit.: 13; Black Sea: 1; W Pacif.: 1; E. Pacif.: 2)
Lg.:
(24) F: 0,46; (133) F: 0,52; (649) F: 0,45; (658) F: 0,525; (880) F: 0,45-0,50; {F: 0,45-0,50}
Rem.: epipelagic-bathypelagic. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, Station "S");
For Razouls (1968 a, p. 154) the descriptions of Farran and Sars show differences on the number of articles of antennae ( A1). These differences are due to a segmentation only sketched on certain segments. The antennae of the individual collected to Banyuls seems closer to that of the specimen of Farran. the chetotaxy of the 2nd segment of endopodites differs strikingly from that observed by Farran for P1 and P2, but this last author is not sure of his observation. My own observations suit to those of Sars for P1, P3 and P4 but differ for P2 where appear only 5 setae. The presence of this rare species in the Mediterranean Sea, with Diaixis hibernica and Paraeuchaeta norvegica suggests the hypothesis of species glacial relicts. Oithona parvula observed off the northwest coast(ribs) of Ireland ( Farran) and on the coast(ribs) of Norway ( Sars) completes the list of these species of Atlantic boreal origin present it.
Last update : 20/02/2018
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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2019. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed February 22, 2019]

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