Abstract
For Tisbe cucumariae Humes, setation and segmentation are described for all 6 naupliar and all 5 copepodid larval stages. This sequence of anatomical development is expressed numerically and compared with development sequences previously described for 4 other species of Tisbe. Interspecifically, the nauplii are more dissimilar than the subsequent copepodids. This is a violation of the general rule that among animals developmental stages become progressively more diverse (von Baer's third law). One possible explanation for this violation is cenogenesis. A second possibility is that the earlier the developmental stage, the smaller its size, and the greater becomes the chance of inaccurate description.
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Communicated by N.D. Holland, La Jolla
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Lopez, G.W. Description of the larval stages of Tisbe cucumariae (Copepoda: Harpacticoida) and comparative development within the genus Tisbe . Mar. Biol. 57, 61–71 (1980). https://doi.org/10.1007/BF00387371
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DOI: https://doi.org/10.1007/BF00387371