Euchaetidae Family - Marine Planktonic Copepods

Calanoida ( Order )	details
Clausocalanoidea ( Superfamily )	details

Abbreviations or symbols

Euchaetidae Giesbrecht, 1892 ( Clausocalanoidea )

Syn.:

Euchaetina Giesbrecht, 1892 (p.55);
Euchaetinae : Esterly, 1905 (p.156)

Ref.:

Sars, 1902 (1903) (p.36); 1925 (p.97); Gurney, 1931 a (p.84); Rose, 1933 a (p.112); Sewell, 1929 (p.12, 132); 1947 (p.110); Brodsky, 1950 (1967) (p.81, 196); Mazza, 1967 (p.144); Andronov, 1974 a (p.1005); Park, 1978 (p.199); Razouls, 1982 (p.234); Bowman & Abele, 1982 (p.9); Bradford & al., 1983 (p.13); Brodsky & al., 1983 (p.144, 147); Zheng Zhong & al., 1984 (1989) (p.235); Sazhina, 1985 (p.113: N); Mauchline, 1987 (p.731, 734); Fontaine, 1988 (p.27, 30, Rem.); Ferrari, 1992 (p.392, tab.3); Razouls, 1993 (p.310); Mazzocchi & al., 1995 (p.176: Rem.); Park, 1995 (p.5, Redef., 95); Chihara & Murano, 1997 (p.797); Mauchline, 1999 (n°182, p.5: species Key); Bradford-Grieve & al., 1999 (p.880, 903; 923, Genera Key; Valdiviella includes in this family); Ohtsuka & Huys, 2001 (p.445, 461); Boxshall & Halsey, 2004 (p.118, Déf., Genera Key); Mulyadi, 2004 (p.67); Vives & Shmeleva, 2007 (p.644, Key G.); Blanco-Bercial & al., 2011 (p.103, Table 1, Fig.2, 3, 4, Biol. mol, phylogeny) ; Jeong & al., 2011 (p.117, species key: p.130); Laakmann & al., 2012 (p.535, Rem.: p.543, phylogeny).
Bradford-Grieve J.M., (2002 onwards). Key to calanoid copepod families. Version 1 : 2 oct 2002. http://www.crustacea.net/crustace/calanoida/index.htm

Rem.:

The number of genera included in this family differs according to the authors, the discussion dealing with the validity of Paraeuchaeta.
Park (1995) redefines the family and confirms the existence of the two genera.
2 G.: Euchaeta, Paraeuchaeta.

issued from : E.L. Markhaseva & F.D. Ferrari in Invert. Zool., 2005, 2 (2). [p.162, Table 4]
Setation of oral parts in females Euchaetidae (Clausocalanoidea) and ancestral condition of setation.

(1) Euchaeta Philippi, 1843

Species, varieties and details

Syn.:

Euchirus Dana,1846; Euchäta : Giesbrecht, 1892 (p.55, 245); Euchaete : With, 1915 (p.157, clé spp.).
? Paraeuchaeta A. Scott, 1909 (p.69)

Ref.:

Claus, 1863 (p.183); Giesbrecht & Schmeil, 1898 (p.37, clé spp.); Sars, 1902 (1903) (p.36); Esterly, 1905 (p.156, clé spp.); van Breemen, 1908 a (p.48, clé spp.); A. Scott, 1909 (p.64); Wolfenden, 1911 (p.293); Sars, 1925 (p.103); Sewell, 1929 (p.146); Wilson, 1932 a (p.62); Rose, 1933 a (p.112, clé spp.); Farran, 1936 a (p.92: Rem.); Mori, 1937 (1964) (p.42, clé spp.); Sewell, 1947 (p.110, Rev.); Davis, 1949 (p.33); Brodsky, 1950 (1967) (p.197, clé spp.); Vervoort, 1957 (p.74 & suiv., Rev.); Tanaka, 1958 (p.327); Gaudy, 1963 b (p.13, clé spp.); Vervoort, 1963 b (p.157, Rem.); Owre & Foyo, 1967 (p.51, Rem., clé spp.); Tanaka & Omori, 1968 (p.219); Owre & Foyo, 1967 (p.51, clé spp.); Tanaka, 1973 (p.147); Bradford, 1974 (p.159); Park, 1975 c (p.1, clé spp.); 1978 (p.201, Rev., clé spp.); Séret, 1979 (p.88); Bradford, 1981 (p.398, Rem.); Razouls, 1982 (p.234); Gardner & Szabo, 1982 (p.259); Bradford & al., 1983 (p.13, Redéf., p.18); Zheng Zhong & al., 1984 (1989) (p.236, clé spp.); Mauchline, 1988 (p.731: pores cuticulaires); Fontaine, 1988 (p.27, 30, Rem.: E. antarctica Group); Razouls, 1993 (p.310); Park, 1995 (p.13, 95, Redef., clé spp.); Chihara & Murano, 1997 (p.797); Mauchline, 1998 (p.92: F; p.93: M); 1999 (CIEM, n°182, p.5, clé spp.); Bradford-Grieve & al., 1999 (p.924, clé spp.); Boxshall & Halsey, 2004 (p.120); Mulyadi, 2004 (p.67); Vives & Shmeleva, 2007 (p.645, spp. Key)

Rem.:

type: Cyclops marinus Prestandrea,1833. The genus redefined by Bradford & al. (1983, p.18) holds only 4 spp.: E. indica , E. marina , E. marinella , E. rimana. Fontaine (1988) discusses the validity of this genus founded on the type species P. norvegica Boeck,1872. Numerous species show characters, intermediate between the two type species: E. marina and P. norvegica. Species groups have been tempted as E. marina et E. antarctica . According to the authors the species would be distributed, subsequently to ancient descriptors, in one genus ( With,1915; Vervoort,1957; Fontaine,1967; Bradford, 1972; 1974; Park,1975; Fontaine, 1988 ), or two genera ( A. Scott,1909; Sars, 1925; Rose, 1933 a; Sewell, 1947; Brodsky,1950; Tanaka,1958; Heptner,1971; Yamanaka, 1976; Bradford & al., 1983; Park, 1995 (p.13).
Park (1995) redefines the genus and establishes 3 groups: 'marina', 'concinna', 'acuta', plus 1 independant (E. spinosa), comprising a total of 16 analysed (*) species.
In total, 16 species have been inventoried but certain need a complementary description.

Remarks on dimensions and sex ratio:

The mean female size is 3,632 mm (n= 16; S= 1,109; Cv= 0,305) and the mean male size is 3,424 mm (n= 13; S= 1,091; Cv= 0,319). The size ratio (M/F) is 0,937 or 93,7 % (n= 13; S= 0,039; Cv= 0,042). Le sex-ratio (F/M) est de 1,2.

(2) Paraeuchaeta A. Scott, 1909

Species, varieties and details

Syn.:

Pareuchaeta : Sars, 1925 (p.104, 111); Rose, 1933 a (p.117, clé spp.); Jespersen, 1934 (p.70); Farran, 1936 a (p.92: Rem.); Sewell, 1947 (p.110, 120); Brodsky, 1950 (1967) (p.203, clé spp.); Vervoort, 1957 (p.75 & suiv., Rem.); Tanaka, 1958 (p.327, 333); Heptner, 1968 (p.680); 1971 (p.76, Rem.: 4 Groupes); Zvereva, 1976 (p.70); Heptner, 1987 (p.1177, 1188, Rem.); Mauchline, 1988 (p.731: pores cuticulaires); Park, 1994 (p.317: Biogéo); Mauchline, 1998 (p.92: F; p.93: M)

Ref.:

A. Scott, 1909 (p.69); Brady, 1918 (p.20); Sewell, 1929 (p.154); Wilson, 1932 a (p.65); Sewell, 1947 (p.110, 120: 4 Groupes); Bradford, 1981 (p.398, Rem.); Razouls, 1982 (p.264); Bradford & al., 1983 (p.20, Redef.); Razouls, 1993 (p.310); Park, 1995 (p.29, Redef., clé spp.); Chihara & Murano, 1997 (p.798, clé spp.); Bradford-Grieve & al., 1999 (p.924, 925: clé spp.); Boxshall & Halsey, 2004 (p.120); Vives & Shmeleva, 2007 (p.656, spp. Key)

Rem.:

Park (1995) redefines 6 species groups: 'malayensis' (p.30, 31, 97), 'pavloskii' (p.30, 66, 98), 'norvegica' (p.30, 71, 98), 'glacialis' (p.31, 81, 98), 'hebes' (p.31, 83, 99), 'antarctica' (p.30, 87, 99), plus 3 independant species (p.30). Following the criteria defined by Park (1995) 66 spp. belong to this genus (*), 15 spp. seem to have been referred to (**), the remaining species need a complementary description. In total 88 spp. are inventoried (plus 3 unidentified).

Remarks on dimensions and sex ratio:

If one takes only into account the species belonging the most assuredly to the genus Paraeuchaeta, the mean female size is 7,332 mm (n= 66; S= 1,841; Cv= 0,251) and the mean male size is 6,184 mm (n= 50; S= 1,372; Cv= 0,222). The size ratio (M/F) is 0,884 or 88,4 % (n= 50; S= 0,079; Cv= 0,089). The sex-ratio (F/M) is 1,32