Phylogenetic analysis of the monocotylidae (monogenea) inferred from 28S rDNA sequences

Chisholm, Leslie A., Morgan, Jess A.T., Adlard, Rob D. and Whittington, Ian D. (2001) Phylogenetic analysis of the monocotylidae (monogenea) inferred from 28S rDNA sequences. International journal for parasitology, 31 13: 1537-1547. doi:10.1016/S0020-7519(01)00313-7

Author Chisholm, Leslie A.
Morgan, Jess A.T.
Adlard, Rob D.
Whittington, Ian D.
Title Phylogenetic analysis of the monocotylidae (monogenea) inferred from 28S rDNA sequences
Journal name International journal for parasitology   Check publisher's open access policy
ISSN 0020-7519
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1016/S0020-7519(01)00313-7
Open Access Status Not yet assessed
Volume 31
Issue 13
Start page 1537
End page 1547
Total pages 11
Language eng
Subject 2405 Parasitology
2725 Infectious Diseases
Abstract The current classification of the Monocotylidae (Monogenea) is based on a phylogeny generated from morphological characters. The present study tests the morphological phylogenetic hypothesis using molecular methods. Sequences from domains C2 and D1 and the partial domains C1 and D2 from the 28S rDNA gene for 26 species of monocotylids from six of the seven subfamilies were used. Trees were generated using maximum parsimony, neighbour joining and maximum likelihood algorithms. The maximum parsimony tree, with branches showing less than 70% bootstrap support collapsed, had a topology identical to that obtained using the maximum likelihood analysis. The neighbour joining tree, with branches showing less than 70% support collapsed, differed only in its placement of Heterocotyle capricornensis as the sister group to the Decacotylinae clade. The molecular tree largely supports the subfamilies established using morphological characters. Differences are primarily how the subfamilies are related to each other. The monophyly of the Calicotylinae and Merizocotylinae and their sister group relationship is supported by high bootstrap values in all three methods, but relationships within the Merizocotylinae are unclear. Merizocotyle is paraphyletic and our data suggest that Mycteronastes and Thaumatocotyle, which were synonymized with Merizocotyle after the morphological cladistic analysis, should perhaps be resurrected as valid genera. The monophyly of the Monocotylinae and Decacotylinae is also supported by high bootstrap values. The Decacotylinae, which was considered previously to be the sister group to the Calicotylinae plus Merizocotylinae, is grouped in an unresolved polychotomy with the Monocotylinae and members of the Heterocotylinae. According to our molecular data, the Heterocotylinae is paraphyletic. Molecular data support a sister group relationship between Troglocephalus rhinobatidis and Neoheterocotyle rhinobatidis to the exclusion of the other species of Neoheterocotyle and recognition of Troglocephalus renders Neoheterocotyle paraphyletic. We propose Troglocephalus incertae sedis. An updated classification and full species list of the Monocotylidae is provided.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
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Created: Fri, 22 Dec 2017, 10:44:04 EST