Phylogenetic relationships of Echinostoma Rudolphi, 1809 (Digenea: Echinostomatidae) and related genera re-assessed via DNA and morphological analyses

In order to investigate the relationships within the Echinostomatidae two data sets of gene sequences were analysed. The first consisted of all previously published ND1 sequences (20) together with 17 new sequences. The latter represented six species from the cosmopolitan genera Echinostoma, Echinop...

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Bibliographic Details
Published in:Systematic parasitology 2003-03, Vol.54 (3), p.159-176
Main Authors: Kostadinova, A, Herniou, E A, Barrett, J, Littlewood, D T J
Format: Article
Language:English
Subjects:
Animals
Base Sequence
Digenea
DNA, Helminth - analysis
DNA, Helminth - genetics
Echinoparyphium
Echinoparyphium aconiatum
Echinoparyphium ellesi
Echinostoma
Echinostoma - anatomy & histology
Echinostoma - classification
Echinostoma - genetics
Echinostoma revolutum
Echinostomatidae
Evolution
Evolution, Molecular
Genetics
Hypoderaeum
Isthmiophora
Marine
Phylogeny
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Summary:In order to investigate the relationships within the Echinostomatidae two data sets of gene sequences were analysed. The first consisted of all previously published ND1 sequences (20) together with 17 new sequences. The latter represented six species from the cosmopolitan genera Echinostoma, Echinoparyphium, Hypoderaeum and Isthmiophora. The second data-set of ITS sequences again included all previously published sequences (12) and three new sequences from species of Echinostoma, Echinoparyphium and Isthmiophora. All new isolates, as well as voucher material from five previously sequenced isolates, were identified on the basis of morphological characters. The phylogenetic trees inferred from the ND1 data set helped to clarify the generic affiliation of all isolates and confirmed the morphological identifications. The only exception was Echinoparyphium aconiatum, whose current position in the genus Echinoparyphium was not supported by the sequence data. Although the ITS data provided insufficient resolution for an unequivocal solution to the relationships within the genus Echinostoma, it supported the identification of Echinoparyphium ellisi and the distinct species status of three isolates of Echinostoma revolutum as predicted from the ND1 data.
ISSN:0165-5752
1573-5192
DOI:10.1023/A:1022681123340