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| Oithonidae Dana, 1853 ( Cyclopoida ) | | Syn.: | Cyclopidae : Giesbrecht, 1892 (p.36) (part.) ; van Breemen, 1908 a (part., p.166) | | Ref.: | Sars, 1900 (p.119);1913 (1918) (p.4); Kiefer, 1929 g (p.2); Rose, 1933 a (p.279); Gonzalez & Bowman, 1965 (p.268); Wellershaus, 1970 (p.474); Shuvalov, 1980 (p.13, 85, clé des G.); Ferrari & Bowman, 1980 (p.3); Björnberg & al., 1981 (p.663); Razouls, 1982 (p.630); Bowman & Abele, 1982 (p.11); Zheng Zhong & al., 1984 (1989) (p.261); Reid, 1985 a (p.25); Nishida, 1985 a (p.11); Dussart & Defaye, 1985 (p.9); Sazhina, 1985 (p.85); Ho, 1986 (p.177); Nishida, 1986 (p.385: pores cuticulaires); Huys & Boxshall, 1991 (p.465); Razouls, 1993 (p.311); Chihara & Murano, 1997 (p.935); Bradford-Grieve & al., 1999 (p.886, 964, clé spp.); Boxshall & Halsey, 2004 (p.16, 610: Def.; p.611: Genera key); Vives & Shmeleva, 2010 (p.43, Rem., genera key) | | Rem.: | 2 Subfam : Limnoithonidae, Oithoninae | | | | Limnoithoninae Kiefer, 1928 | | Ref.: | Kiefer, 1929 g (p.11); Nishida, 1985 a (p.11); Dussart & Defaye, 1985 (p.10) | | Rem.: | 1 G.: Limnoithona | | | | Oithoninae Kiefer, 1913 | | Ref.: | Kiefer, 1929 g (p.2); Nishida, 1985 a (p.11, clé spp.); Dussart & Defaye, 1985 (p.9); Al-yamani & al., 2011 (p.94) | | Rem.: | 2 G.: Oithona, Dioithona | | | | (1) Dioithona Kiefer, 1935 ( Oithoninae ) | |
| | Syn.: | Dioithona Kiefer, 1935 f (p.322, espèce type: Dioithona alia ) | | Ref.: | Lindberg, 1950 (clé spp.F); Vervoort, 1964 a (p.25, Rem.); Gonzalez & Bowman, 1965 (p.268); Wellershaus, 1970 (p.472); Shuvalov, 1980 (p.86, 169); Razouls, 1982 (p.645); Nishida, 1985 a (p.48, Rem.); Dussart & Defaye, 1985 (p.9); Vives & Shmeleva, 2010 (p.45, Rem.) | | Rem.: | Vervoort (1964) believes that the creation of this genus rests on a character that is too restrictive and suggests to consider it only as a subgenus of Oithona. This opinion is followed by Wellershaus (1970) who reviews several characters in some Oithona species. Shuvalov (1980, p.86, 169) considers the genus as justified. Meanwhile, after examination of the males and on the basis of a phylogenetic analysis (Abiahy, 2000), Boxshall & Halsey (2004, p.611) restore the validity of the genus Dioithona. 5 spp. (including 1 doubtful). | | | | (2) Limnoithona Burckhardt, 1913 ( Limnoithoninae ) | |
| | Ref.: | Burckhardt, 1913 (p.421); Rosendorn, 1917 a (p.6); Kiefer, 1929 g (p.11); Razouls, 1982 (p.645); Shuvalov, 1980 (p.86, 187); Dussart & Defaye, 1985 (p.10) | | Rem.: | 2 spp. | | Remarks on dimensions and sex ratio: | | The mean female size is 0,503 mm and the mean male size is 0,440 mm. The size ratio (M/F) is 0,876 ou 87,6 %. | | | | (3) Oithona Baird, 1843 ( Oithoninae ) | |
| | Syn.: | Paroithona Farran, 1908 b (p.89); 1913 a (p.192, clé spp.); Rosendorn, 1917 (p.5); Sars, 1918 (p.207); Kiefer, 1929 g (p.3, 10); Rose, 1933 a (p.284); Shuvalov, 1980 (p.86, 190); Razouls, 1982 (p.644); Nishida, 1985 a (p.11,15, 16, 137, clé spp., Rem.); 1986 (p.388); Dussart & Defaye, 1985 (p.10); Razouls, 1993 (p.311); Chihara & Murano, 1997 (p.939) | | Ref.: | Brady, 1878 (p.90); Giesbrecht, 1892 (p.77, 537); Sars, 1900 (p.119); Wheeler, 1901 (p.186); Esterly, 1905 (p.207); van Breemen, 1908 a (p.166, clé spp.); A. Scott, 1909 (p.193); Sars, 1913 (1918) (p.4); Burckhardt, 1913 (p.420, 439); Farran, 1913 a (p.182, 191, clé spp.); Rosendorn, 1917 a (p.4, 6, 50: key spp., biogéo); Pesta, 1920 (p.548, key spp.); Kiefer, 1929 g (p.3, clé spp.); Wilson, 1932 a (p.311); Rose, 1933 a (p.279); Mori, 1937 (1964) (p.108); Dakin & Colefax, 1940 (p.115, clé spp.); Oliveira, 1946 (p.478); Davis, 1949 (p.73); Lindberg, 1950 e (p.273, clé spp.F); Carvalho, 1952 a (p.165); Lindberg, 1955 e (p.464, key spp.); Björnberg, 1963 (p.73); Gonzalez & Bowman, 1965 (p.268, clé spp.); Owre & Foyo, 1967 (p.107, key spp.); Wellershaus, 1970 (p.477, 478, Rem. spp.); Nishida & al., 1977 (p.125, key spp.); Ferrari & Bowman, 1980 (p.5, Rem.); Shuvalov, 1980 (p.86, clé spp.); Björnberg & al., 1981 (p.663, key spp.); Razouls, 1982 (p.632); Gardner & Szabo, 1982 (p.107); Zheng Zhong & al., 1984 (1989) (p.261, key spp.); Dussart & Defaye, 1985 (p.9); Reid, 1985 a (p.26, key spp.); Nishida, 1985 a (p.14, key spp.); 1986 (p.385: pores cuticulaires); Huys & Boxshall, 1991 (p.465); Chihara & Murano, 1997 (p.935, key spp.); Bradford-Grieve & al., 1999 (p.965: key spp.) ; Vives & Shmeleva, 2010 (p.45, 47 Rem., key spp.) | | Rem.: | Kiefer (1935) distinguishes two groups of species within the genus Oithona. The first group, Oithona (sensu stricto), is characterised by the very small unique segment of the P5 (narrow and long, or reduced to a protuberance), having only two setae on its extremity. Also, one seta projects at each side on the external angle of the last thoracic segment.
The second group comprises the species in which the segment of the P5 is better developed (oviform) and of which the extremity bears a long plumose seta and a second, smaller seta, directed to the body axis and which has the aspect of a subtle spine (Dioithona). The author underlines the importance of the structure of the P5 in the Cyclopoids of fresh water and thinks that it is, mistakenly, neglected in the Oithonidae family.
The ecophenotypic variations could be important in the Oithonidae family making the identification of the species difficult and the synonymies confusing (Nishida & al., 1977).
These small carnivores, often very abundant, and generally underestimated because of the used mesh size in sampling, deserve a special attentiion because of their role in the pelagic food web. (cf.: Gallienne & Robins, 2001, p.1421) . Type: Oithona plumifera Baird,1843. 44 spp. (+ 1 doubtful) + 4 unidentified. | | Remarks on dimensions and sex ratio: | | The mean female size is 0,789 mm (n= 39; S= 0,307; Cv= 0,389) and the mean male size is 0,608 mm (n= 23; S= 0,171; Cv= 0,281). The size ratio (M/F) is 0,833 ou 83,3 % (n= 23; S= 0,139; Cv= 0,167) |  issued from : C.T. Achuthankutty, N. Ramaiah & G. Padmavati in Pelagic biogeograpgy ICoPB II. Proc. 2nd Intern. Conf. Final report of SCOR/IOC working group 93, 9-14 July 1995. Workshop Report No. 142, Unesco, 1998. [p.8, Fig.6]. Salinity ranges for Oithona spp. in coastal and estuarine waters of Goa (India). Shaded area indicates the range of higher abundance. | | | | | Oithonina Sars, 1913 | | Ref.: | Sars, 1913 (1918) (p.5); Wilson, 1932 a (p.316); 1942 a (p.197); Razouls,1982 (p.644); 1993 (p.311) | | Rem.: | Cf. Oithona | | | | | Ref.: | Boxshall & Halsey, 2004 (p.611: Rem.) | | Rem.: | Cf. Oithona | | | |
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