Phylogenetic analysis of European species of Proteocephalus (Cestoda: Proteocephalidea): compatibility of molecular and morphological data, and parasite-host coevolution. |
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Authors: | A Skeríková V Hypsa T V Scholz |
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Institution: | Faculty of Biological Sciences, University of South Bohemia and Institute of Parasitology, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05, Ceské Budejovice, Czech Republic. |
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Abstract: | The phylogeny of European species of the tapeworm genus Proteocephalus was studied, based on partial 18S rDNA and morphological data. The group was found to be monophyletic. The analysis showed a low informative value of available morphological characters in comparison with molecular data. The morphological matrix resulted in a poorly resolved tree which is, however, compatible with the topology (Proteocephalus osculatus (Proteocephalus torulosus (Proteocephalus macrocephalus, Proteocephalus filicollis) (Proteocephalus tetrastomus, Proteocephalus percae, Proteocephalus longicollis))) based on the 18S rDNA data. A comparison performed by the program TreeMap showed a lack of significant congruency between parasite and host phylogenies. Therefore, the distribution of species in their hosts appears to be independent of the phylogeny and it is likely to be a result of host-switching, rather than co-speciation events. |
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