Platycopioida ( Order )
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.
Family Platycopiidae - Plate 1Issued 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
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
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
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
Ref.: Martinez Arbizu, 1997 (p.36); Boxshall & Halsey, 2004 (p.48)
Rem.: Type: Sarsicopia polaris. 1 sp.

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed January 28, 2022]

© copyright 2005-2022 Sorbonne University, CNRS

Webmaster
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université

 

Version française
English version

 

Search

On the WEB of CNRS

 


Marine Planktonic Copepods

Marine Planktonic Copepods

 

Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins