Abstract
The genera Caligus and Lepeophtheirus can be used to illustrate some evolutionary trends. The most striking example of these trends is a gradual reduction of the fourth thoracopod. now largely functionless. All stages of this reduction can be found in Caligidae. Other, apparently correlated, changes are also present. For example, reduction in the armature of the first thoracopod occurs mainly among species in which the fourth exopod has become twosegmented, though still retaining the seta associated with the original three-segmented structure.
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References
Kabata, Z. 1979 Parasitic Copepoda of British fishes. Ray Socicty: London. 468 p.. 199 pl.
Kabata, Z. and G. C. Hewitt, 1971. Locomotory mechanisms in Caligidae ( Crustacea: Copepoda). J. Fish. Res. Bd Can.. 28: 1143–1151.
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© 1988 Kluwer Academic Publishers
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Kabata, Z. (1988). Some evolutionary trends in caligid copepods. In: Boxshall, G.A., Schminke, H.K. (eds) Biology of Copepods. Developments in Hydrobiology, vol 47. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3103-9_72
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DOI: https://doi.org/10.1007/978-94-009-3103-9_72
Publisher Name: Springer, Dordrecht
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