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Phylogeny and biogeography of species of Syphacia Seurat, 1916 (Nemata:Oxyurida:Oxyuridae) from the Australian Bioregion

Phylogeny and biogeography of species of Syphacia Seurat, 1916 (Nemata:Oxyurida:Oxyuridae) from... Pinworm nematodes of the genus Syphacia (Nemata:Oxyurida:Oxyuridae) have a global distribution, and infect the caecum of rodents. Within the Australian Bioregion, 17 species of Syphacia infect a range of rodent hosts. Pinworms are traditionally thought to have coevolutionary relationships with their hosts, but the evolution and dispersal of Australian rodents and their helminths remains unclear. This combination of factors allowed us to investigate the likely relationships of Australian Syphacia species based on phylogenetic analysis, overlaid with the ecology and relationships of host species. We conducted a phylogenetic analysis using morphological characters of the species of Syphacia from the Australian Bioregion in order to examine the relationships between species, and to investigate how host evolution and phylogeny could inform (or be informed) by parasite phylogeny. Application of the taxon pulse theory of parasite speciation by matching host species to parasites shed some light on the timing of speciation of rodent hosts. We found that species of Syphacia had reasonably close hostparasite relationships, with additional evidence for ecological fitting or host switching occurring. Evidence provided here suggests strongly that most elements of the Stockholm Paradigm are at play in structuring the relationships we observe in this pinwormmammal system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Journal of Zoology CSIRO Publishing

Phylogeny and biogeography of species of Syphacia Seurat, 1916 (Nemata:Oxyurida:Oxyuridae) from the Australian Bioregion

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Publisher
CSIRO Publishing
Copyright
Copyright © American Meteorological Society
ISSN
0004-959X
eISSN
1446-5698
DOI
10.1071/ZO15080
Publisher site
See Article on Publisher Site

Abstract

Pinworm nematodes of the genus Syphacia (Nemata:Oxyurida:Oxyuridae) have a global distribution, and infect the caecum of rodents. Within the Australian Bioregion, 17 species of Syphacia infect a range of rodent hosts. Pinworms are traditionally thought to have coevolutionary relationships with their hosts, but the evolution and dispersal of Australian rodents and their helminths remains unclear. This combination of factors allowed us to investigate the likely relationships of Australian Syphacia species based on phylogenetic analysis, overlaid with the ecology and relationships of host species. We conducted a phylogenetic analysis using morphological characters of the species of Syphacia from the Australian Bioregion in order to examine the relationships between species, and to investigate how host evolution and phylogeny could inform (or be informed) by parasite phylogeny. Application of the taxon pulse theory of parasite speciation by matching host species to parasites shed some light on the timing of speciation of rodent hosts. We found that species of Syphacia had reasonably close hostparasite relationships, with additional evidence for ecological fitting or host switching occurring. Evidence provided here suggests strongly that most elements of the Stockholm Paradigm are at play in structuring the relationships we observe in this pinwormmammal system.

Journal

Australian Journal of ZoologyCSIRO Publishing

Published: Jun 17, 2016

References