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Genetic variation within the genus Macropostrongyloides (Nematoda: Strongyloidea) from Australian macropodid and vombatid marsupials

Published online by Cambridge University Press:  28 August 2019

Tanapan Sukee Open the ORCID record for Tanapan Sukee [Opens in a new window] ,
Ian Beveridge ,
Neil B. Chilton  and
Abdul Jabbar Open the ORCID record for Abdul Jabbar [Opens in a new window]
Tanapan Sukee*
Affiliation:
Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia
Ian Beveridge
Affiliation:
Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia
Neil B. Chilton
Affiliation:
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
Abdul Jabbar*
Affiliation:
Department of Veterinary Biosciences, Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia
*
Author for correspondence: Tanapan Sukee, E-mail: tsukee@student.unimelb.edu.au and Abdul Jabbar, E-mail: jabbara@unimelb.edu.au
Author for correspondence: Tanapan Sukee, E-mail: tsukee@student.unimelb.edu.au and Abdul Jabbar, E-mail: jabbara@unimelb.edu.au
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Abstract

The genetic variation and taxonomic status of the four morphologically-defined species of Macropostrongyloides in Australian macropodid and vombatid marsupials were examined using sequence data of the ITS+ region (=first and second internal transcribed spacers, and the 5.8S rRNA gene) of the nuclear ribosomal DNA. The results of the phylogenetic analyses revealed that Ma. baylisi was a species complex consisting of four genetically distinct groups, some of which are host-specific. In addition, Ma. lasiorhini in the common wombat (Vombatus ursinus) did not form a monophyletic clade with Ma. lasiorhini from the southern hairy-nosed wombat (Lasiorhinus latifrons), suggesting the possibility of cryptic (genetically distinct but morphologically similar) species. There was also some genetic divergence between Ma. dissimilis in swamp wallabies (Wallabia bicolor) from different geographical regions. In contrast, there was no genetic divergence among specimens of Ma. yamagutii across its broad geographical range or between host species (i.e. Macropus fuliginosus and M. giganteus). Macropostrongyloides dissimilis represented the sister taxon to Ma. baylisi, Ma. yamagutii and Ma. lasiorhini. Further morphological and molecular studies are required to assess the species complex of Ma. baylisi.

Keywords

Cryptic speciesinternal transcribed spacersmacropodid marsupialsMacropostrongyloidesphylogenetic relationshipsstrongylid nematodesvombatid marsupials
Type
Research Article
Information
Parasitology , Volume 146 , Issue 13 , November 2019 , pp. 1673 - 1682
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Copyright
Copyright © Cambridge University Press 2019 

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