Platycopiidae Family - Marine Planktonic Copepods

Platycopioida ( Order )	details

Abbreviations or symbols

Platycopiidae Sars, 1911

Ref.:

Sars, 1911 a (p.14 ); Rose, 1933 a (p.165); Lang, 1948 (p.24); Bradford, 1969 b (p.502, Table 3); Fosshagen, 1972 (p.51); Andronov, 1974 a (p.1005, 1009); 1985 (p.1738); Bowman & Abele, 1982 (p.10); Razouls, 1982 (p.49); Fosshagen & Iliffe, 1985 (p.353, Rev.); 1988 (p.358, Rev.); Huys & Boxshall, 1991 (p.376, 384, 402, 419); Razouls, 1993 (p.306); Boxshall & Halsey, 2004 (p.11; 46: Def.; p.48: Key to Genera)

Rem.:

Key to genera after Boxshall & Halsey (2004, p.48):
1 - P2 to P4 with 2 inner setae on 2nd endopodal segment .....Sarsicopia.
- P2 to P4 with 1 inner seta on 2nd endopodal segment ..... 2.
2 - P2 to P4 with 2-segmented endopods ..... Nanocopia.
- P2 to P4 with 3-segmented endopods ..... 3.
3 - Male A1 geniculate between segments homologous with XXIV and XXV; Mx2 with reduced syncoxal endites represented by 2 isolated setae ..... Antrisocopia
- Male A1 non-geniculate; Mx2 with separate praecoxa and coxa armed with 4, 1, 3, 3 elements on endites ..... Platycopia.

Issued from : G.A. Boxshall & S.H. Halsey in An Introduction to Copepod Diversity. The Ray Society, 2004, No 166, Part. I. [p.46].
Armature formula of swimming legs P1 to P5.

(1) Antrisocopia Fosshagen, 1985

Species, varieties and details

Ref.:

Fosshagen & Iliffe, 1985 (p.353); Huys & Boxshall, 1991 (p.34, 39, 338, 460, Rem.); Razouls, 1993 (p.306); Ohtsuka & Boxshall, 1994 (p.165); Mauchline, 1998 (p.76: F, M); Boxshall & Halsey, 2004 (p.48)

Rem.:

Type: Antrisocopia prehensilis. 1 sp.

(2) Nanocopia Fosshagen, 1988

Species, varieties and details

Ref.:

Fosshagen & Iliffe, 1988 (p.358); Huys & Boxshall, 1991 (p.33, 338, 465, Rem.); Razouls, 1993 (p.306); Ohtsuka & Boxshall, 1994 (p.166); Mauchline, 1998 (p.93: F, M); Boxshall & Halsey, 2004 (p.48)

Rem.:

Type: Nanocopia minuta. 1 sp.
For Fosshagen & Iliffe (1988, p.361) in view of the sexual characters, very similar mouthparts, and the advanced character state of the swimming legs, this genus and Platycopia seem to be more closely related to each other than to Antrisocopia. The robust and compressed shape of Nanocopia suggests a benthic habitat; it is probable that the animal occupy small crevices in the porous and fissured rock and only occasionally enter the more open water of cave

(3) Platycopia Sars, 1911

Species, varieties and details

Syn.:

Arenocalanus C. B. Wilson,1935

Ref.:

Sars, 1911 (p.3, 14); 1919 (1921) (p.10, Rem.); Rose, 1933 a (p.165); M.S. Wilson, 1946 (p.3, Rev., clé spp.); Fosshagen, 1972 (p.51); Andronov, 1974 a (p.1002, 1009); Razouls, 1982 (p.49); Huys & Boxshall, 1991 (p.33, 34, 329, 331, 338, 356, 406, 466); Razouls, 1993 (p.306); Ohtsuka & Boxshall, 1994 (p.166, key spp.); Mauchline, 1998 (p.76: F, M); Boxshall & Halsey, 2004 (p.48)

Rem.:

Type: Platycopia perplexa. 8 spp. + 2 undetermined.
For Ohtsuka & Boxshall (1994, p.163) the intermaxillipedal process is not developed in P. orientalis, whereas it forms a powerful spinous process in P. inornata and P. perplexa. In the most closely related P. pygmaea, this structure is a slightly raised process bearing a tuft of long, radiating spinules (Huys, pers. comm.). The remarkable development of the intermaxillipedal process appears to be found only in relatively plesiomorphic species of Platycopia. It is likely that the absence of the intermaxillipedal process represents a secondary loss.

Remarks on dimensions and sex ratio:

The mean female size is 0,709 mm (n= 7; S= 0,142; Cv= 0,20) and the mean male size is 0,636 mm (n= 7; S= 0,135; Cv= 0,212). The size ratio (M/F) is 0,896 ou 89,6 % (n= 6; S= 0,053; Cv= 0,059)

(4) Sarsicopia Martinez Arbizu, 1997

Species, varieties and details

Ref.:

Martinez Arbizu, 1997 (p.36); Boxshall & Halsey, 2004 (p.48)

Rem.:

Type: Sarsicopia polaris. 1 sp.