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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1609

Title: Filling a gap in the phylogeny of flatworms: relationships within the Rhabdocoela (Platyhelminthes), inferred from 18S ribosomal DNA sequences
Authors: Willems, Wim
Walberg, A.
Jondelius, U.
Littlewood, D.
Backeljau, Thierry
Schockaert, Ernest
Artois, Tom
Issue Date: 2006
Publisher: Norwegian Academy of Science
Citation: ZOOLOGICA SCRIPTA, 35(1). p. 1-17
Abstract: The phylogeny of the Rhabdocoela, a species-rich taxon of free-living flatworms, is reconstructed based on complete 18S rDNA sequences. The analysis includes 62 rhabdocoels and 102 representatives of all major flatworm taxa. In total, 46 new sequences are used, 41 of them from rhabdocoel species, five from proseriates. Phylogenetic analysis was performed using maximum parsimony and Bayesian inference. Clade support was evaluated with parsimony jackknifing, Bremer support indices and Bayesian posterior probabilities. The resulting cladogram corroborates that the Rhabdocoela is monophyletic, but its sister group remains uncertain. The ‘Dalyellioida’ and the ‘Typhloplanoida’, both former rhabdocoel subtaxa, are polyphyletic. Within the Rhabdocoela the monophyletic Kalyptorhynchia, characterized by a muscular proboscis, forms the sister group of all other rhabdocoels. The Schizorhynchia is a monophyletic subtaxon of the Kalyptorhynchia, with the split proboscis as a synapomorphy. Except for the Dalyelliidae and the Typhloplanidae, both freshwater taxa, none of the ‘families’ previously included in the ‘Typhloplanoida’ and the ‘Dalyellioida’ appears to be monophyletic. As a result of this analysis, three existing and four new taxon names are formally defined following the rules of the Phylocode.
URI: http://hdl.handle.net/1942/1609
DOI: 10.1111/j.1463-6409.2005.00216.x
ISI #: 000234650400001
ISSN: 0300-3256
Category: A1
Type: Journal Contribution
Validation: ecoom, 2007
Appears in Collections: Research publications

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