The radiation of Haliotrema (Monogenea: Dactylogyridae: Ancyrocephalinae): molecular evidence and explanation inferred from LSU rDNA sequences
| Autor: | An-Xing Li, Xiansheng Wu, Xing-Quang Zhu, Ming-Quan Xie |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Molecular Sequence Data
Zoology Helminth genetics DNA Ribosomal Polymerase Chain Reaction Genus Phylogenetics Animals Ribosomal DNA Genes Helminth Phylogeny DNA Primers biology Phylogenetic tree Fishes Sequence Analysis DNA DNA Helminth biology.organism_classification Biological Evolution Dactylogyridae Infectious Diseases Platyhelminths Animal Science and Zoology Parasitology Taxonomy (biology) Sequence Alignment Monogenea |
| Zdroj: | Parasitology. 132 |
| ISSN: | 1469-8161 0031-1820 |
| DOI: | 10.1017/s003118200500956x |
| Popis: | The D1-D2 domains of LSU rDNA were used to reconstruct the phylogenetic relationships within the Ancyrocephalinae (Monogenea: Dactylogyridae) utilizing maximum-parsimony (MP), maximum-likelihood (ML), minimum evolution (ME) and neighbour-joining (NJ) methods. A total of 32 monogenean taxa were examined in the present study, including 9 Haliotrema species and 13 other species representing the Ancyrocephalinae, 4 Thaparocleidus species representing the Ancylodiscoididae, and 6 species representing the Diplectanidae which were used as multiple outgroups. All 4 analyses (i.e. MP, ML, ME and NJ) inferred the same interrelationship pattern: (Diplectanidae, (Ancylodiscoididae, Dactylogyridae)) with high bootstrap support. However, 9 Haliotrema species were dispersed to form 4 clades together with species from other genera, indicating the apparent non-monophyly of Haliotrema. Three major groups were defined based on reconstructed phylogenetic trees to explain the radiation of Haliotrema species. The morphology of the reproductive organ, particularly the male copulatory organ (MCO), was discussed to further understand the formation of each group. (1) Results of the present study indicated an intimate relationship among Metahaliotrema (2 species), Protogyrodactylus (4 species) and Haliotrema (2 of 9 species), and notably, all these species share vagina-absence. (2) Based on the present molecular analyses and the morphological characters of the MCO, we propose to transfer H. spirotubiforum and the undetermined Haliotrema sp. ZHDDb to Euryhaliotrema as new combinations. (3) We propose to erect a new genus to accommodate the Haliotrema species with horn-like shaped MCO. Taxonomic implications of the present molecular phylogenetic analyses are discussed. A wider range of taxa and more DNA markers displaying various evolutionary rates should be used to estimate phylogenetic relationships among species within the Ancyrocephalinae and Ancylodiscoididae in further studies. |
| Databáze: | OpenAIRE |
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