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Famille
Discoidae Gordeeva, 1975
Ref.:
Gordeeva, 1975 (p.189); Bowman & Abele, 1982 (p.9); Razouls, 1982 (p.521); Huys & Boxshall, 1991 (p.419); Razouls, 1993 (p.306); Bradford-Grieve,1999 b (p.68, Def., Rem.); Ohtsuka & Huys, 2001 (p.461); Boxshall & Halsey, 2004 (p.12, 14; 49; 108: Def.; p.110: Key of Genera); Vives & Shmeleva, 2007 (p.271, Key of Genera); Andronov & Kosobokova, 2011 (p.38, Rem.)
Bradford-Grieve J.M., (2002 onwards). Key to calanoid copepod families. Version 1 : 2 oct 2002. http://www.crustacea.net/crustace/calanoida/index.htm
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.:
4 G.: Disco, Paradisco, Prodisco, Pertsovius.
Pour Andronov & Kosobokova (2011, p.38-39) plusieurs espèces de la famille des Discoidae sont très similaires; Park (1970) et Schulz (1993) notèrent ce fait qui pourrait justifier leur placement dans un nouvel ensemble. La découverte de 3 nouvelles espèces affiliées à ce dernier clade dans l'Océan arctique a justifié la création d'un genre nouveau: Pertsovius comprenant désormais 7 espèces.
Pour Andronov & Kosobokova (2011, p.38-39) plusieurs espèces de la famille des Discoidae sont très similaires; Park (1970) et Schulz (1993) notèrent ce fait qui pourrait justifier leur placement dans un nouvel ensemble. La découverte de 3 nouvelles espèces affiliées à ce dernier clade dans l'Océan arctique a justifié la création d'un genre nouveau: Pertsovius comprenant désormais 7 espèces.
Figures
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Planche 1
Issued from : G.A. Boxshall & S.H. Halsey in An Introduction to Copepod Diversity. The Ray Society, 2004, No 166, Part. I. [p.108].
Armature formula of swimming legs P1 to P4.
Setation sometimes reduced, especially on endopods in species with reduced endopodal segmentation, such as Disco longus Grice & Hulsemann. Exopodal segment 3 of P2 only, or of P2 to P45 with only 2 outer margin spines in some species.
Nota: Female P5 typically reduced to small transverse plate with unarmed lateral lobes. P5 apparently 3-segmented in Paradisco grandis (Gordejeva).
- Male P5 asymmetrical; right leg slightly longer than left. Both legs with 3-segmented exopod and 2-segmented endopod (in Disco fjordicus): disyal endopodal segment club-shaped and ornamented with tuft of setules. 2nd exopodal segments transformed, right with inner groove, left with inner process. Endopods may be 1 to 3-segmented.
- Eggs presumably released into water.
Issued from : G.A. Boxshall & S.H. Halsey in An Introduction to Copepod Diversity. The Ray Society, 2004, No 166, Part. I. [p.108].
Armature formula of swimming legs P1 to P4.
Setation sometimes reduced, especially on endopods in species with reduced endopodal segmentation, such as Disco longus Grice & Hulsemann. Exopodal segment 3 of P2 only, or of P2 to P45 with only 2 outer margin spines in some species.
Nota: Female P5 typically reduced to small transverse plate with unarmed lateral lobes. P5 apparently 3-segmented in Paradisco grandis (Gordejeva).
- Male P5 asymmetrical; right leg slightly longer than left. Both legs with 3-segmented exopod and 2-segmented endopod (in Disco fjordicus): disyal endopodal segment club-shaped and ornamented with tuft of setules. 2nd exopodal segments transformed, right with inner groove, left with inner process. Endopods may be 1 to 3-segmented.
- Eggs presumably released into water.
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Planche 2
Issued from : G.A. Boxshall & S.H. Halsey in An Introduction to Copepod Diversity. The Ray Society, 2004, No 166, Part. I. [p.109, Fiug.20].
Discoidae. A, Prodisco princeps habitus female; B, Disco hartmanni habitus female; C, A2; D, Mx2; E, P1; F, Disco fjordicus male P5; G, Paradisco nudus female P5. ’Gordejeva, 1975: A; Schulz, 1993: B-E, G; Fosshagen, 1967: F].
Issued from : G.A. Boxshall & S.H. Halsey in An Introduction to Copepod Diversity. The Ray Society, 2004, No 166, Part. I. [p.109, Fiug.20].
Discoidae. A, Prodisco princeps habitus female; B, Disco hartmanni habitus female; C, A2; D, Mx2; E, P1; F, Disco fjordicus male P5; G, Paradisco nudus female P5. ’Gordejeva, 1975: A; Schulz, 1993: B-E, G; Fosshagen, 1967: F].
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Planche 3
Issued from : J.M. Bradford-Grieve in NIWA Biodiversity Memoir 111, 1999. [p/68].
Spine and seta formula of swimming legs P1 to P4.
- P5 female strongly reduced or absent.
- P5 male strongly modified and variable; right and left legs uniramous or biramous, asymmetrical, little different in length; endopods, if present, 1-3-segmented; exopods 3-segmented with terminal setae, segments 1 and 2 usually without setae, segment 2 sometimes has an inner projection.
Issued from : J.M. Bradford-Grieve in NIWA Biodiversity Memoir 111, 1999. [p/68].
Spine and seta formula of swimming legs P1 to P4.
- P5 female strongly reduced or absent.
- P5 male strongly modified and variable; right and left legs uniramous or biramous, asymmetrical, little different in length; endopods, if present, 1-3-segmented; exopods 3-segmented with terminal setae, segments 1 and 2 usually without setae, segment 2 sometimes has an inner projection.
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Planche 4
Issued from : S. Laakmann, E.L. Markhaseva & J. Renz in Mol. Phylog. Evol., 2019, 130. [p.331, Table 1].
compilation of information on relationships among ''Bradfodian'' genera from Markhaseva & Ferrari 2005) and Markhaseva & al. (2014).
Abbreviations: A2, antenna; Md, mandible; Mx1, maxillule; Mx2, maxilla; Mxp, maxilliped ; P5, leg 5. w, worm-like sensory seta; b, brush-like sensory seta; s, sclerotized seta.;
Issued from : S. Laakmann, E.L. Markhaseva & J. Renz in Mol. Phylog. Evol., 2019, 130. [p.331, Table 1].
compilation of information on relationships among ''Bradfodian'' genera from Markhaseva & Ferrari 2005) and Markhaseva & al. (2014).
Abbreviations: A2, antenna; Md, mandible; Mx1, maxillule; Mx2, maxilla; Mxp, maxilliped ; P5, leg 5. w, worm-like sensory seta; b, brush-like sensory seta; s, sclerotized seta.;
Genre
Ref.:
Grice & Hulsemann, 1965 (p.256); Fosshagen, 1967 (p.319); Matthews, 1972 (p.4); Gordeeva, 1974 (p.841); 1974 a (p.1148); 1974 b (p.1414); 1975 (p.188); Razouls, 1982 (p.521); 1993 (p.306); Schulz, 1993 (p.200, Rem.); Mauchline, 1998 (p.66, 77: F; p.76: M); Bradford-Grieve,1999 b (p.69, Def.); Schulz, 2003 (p.110, Rem.); Boxshall & Halsey, 2004 (p.110); Vives & Shmeleva, 2007 (p.272, spp. key)
Rem.:
Ce genre est établi par Grice et Hulsemann pour y inclure trois femelles (les mâles étant inconnus) déterminant chacune trois espèces différentes. En 1967, le mâle de D. inflatus est décrit ainsi qu'un second mâle non identifié à l'une des espèces connues. Les auteurs considèrent ce genre comme appartenant à la famille des Augaptilidae, suivis par Matthews (1972). Fosshagen (1967) estime que les caractéristiques des femelles ne permettent guère un tel classement. Gordeeva (1974 a et b) décrit plusieurs espèces nouvelles et crée en 1975 deux nouveaux genres qui sont inclus dans la nouvelle famille des Discoidae. 22 spp. + 1 indet.
Andronov & Kosobokova (2011, p.38) transfèrent 4 espèces initialement dans le genre Disco dans un nouveau genre: Pertsovius qui comprend maintenant 7 espèces.
Total: 18 spp. +1 uncertain.
Andronov & Kosobokova (2011, p.38) transfèrent 4 espèces initialement dans le genre Disco dans un nouveau genre: Pertsovius qui comprend maintenant 7 espèces.
Total: 18 spp. +1 uncertain.
Remarques sur les dimensions et le sex-ratio
The mean female size is 0.554 (n = 24; SD = 1.779), and the mean male size is 0.575 (n = 6; SD = 0.0338).
Nota the Arctic species (Disco triangularis Markhaseva & Kobosokova, 1998) not included in the calcul, because its great body size: 1.35-1.40 mm.
Nota the Arctic species (Disco triangularis Markhaseva & Kobosokova, 1998) not included in the calcul, because its great body size: 1.35-1.40 mm.
Figures
Genre
Ref.:
Gordeeva, 1975 (p.192); Razouls, 1982 (p.524); 1993 (p.306); Schulz, 1993 (p.205); Mauchline, 1998 (p.73: F; p.74: M); Bradford-Grieve,1999 b (p.69, Def.); Boxshall & Halsey, 2004 (p.110); Vives & Shmeleva, 2007 (p.286, spp. key)
Rem.:
Total: 4 spp.
Remarques sur les dimensions et le sex-ratio
Females: Mean = 0,533 mm (n= 4). Males: Mean = 0,520 mm (n= 3). The size ratio male/female = 0.094.
Genre
Ref.:
Andronov & Kosobokova, 2011 (p.38)
Rem.:
Espèce type : Pertsovius tridentatus. Total: 7 spp.
Genre
Ref.:
Gordeeva, 1975 (p.189); Razouls, 1982 (p.525); 1993 (p.307); Mauchline, 1998 (p.76);Bradford-Grieve,1999 b (p.69, Déf.); Boxshall & Halsey, 2004 (p.110); Vives & Shmeleva, 2007 (p.289)
Rem.:
Total: 2 spp.