Phylogeny,natural groups and nemertean classification |
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Authors: | Per Sundberg |
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Institution: | 1. Department of Zoology, University of Gothenburg, Medicinaregatan 18, S-413 90, G?teborg, Sweden
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Abstract: | Contemporary practice in the classification of nemerteans (phylum Nemertea) is critically discussed. It is argued that basing
higher taxa on the existence of a unique combination of characters in a species (or genus) is unlikely to lead to monophyletic
taxa, and that this approach should be abandoned in favour of a classification based on explicit hypotheses of phylogeny.
These hypotheses should be based on all available characters and characters should not be excluded before the analysis. The
classification should be based on a reconstruction of the phylogeny and reflect this phylogeny in an unambiquous way. |
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Keywords: | Nemertea cladistics systematics |
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