Phylogeny of species of the genus Litomosoides (Nematatoda

Onchocercidae): Evidence of rampant host switching

Sara V. Brant, Scott L Gardner

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Filarioid nematodes of the genus Litomosoides occur in the abdominal and (or) thoracic cavities of marsupials, rodents, and bats of the Nearctic and Neotropical regions. In this study, the phylogenetic relationships among these nematodes were estimated with a parsimony analysis of morphological characters derived from species descriptions. This nonweighted analysis produced 20 shortest trees. The monophyly of the genus was not supported in that Litomosoides thomomydis and Litomosoides westi failed to group with the other members of the genus. When these 2 taxa (parasites of pocket gophers) were excluded, monophyly of Litomosoides was supported by 2 synapomorphies (structure of the walls and general shape of the stoma); however, ancestor- descendant relationships among the species in the genus were not well resolved. A posteriori re-weighting of the characters produced a single tree, different from all 20 most parsimonious trees. Alternative host-parasite evolutionary models were tested against these results supporting the process of host switching as being most important in forming the patterns of mammal- nematode associations that have been detected in this group of nematodes.

Original languageEnglish (US)
Pages (from-to)545-554
Number of pages10
JournalJournal of Parasitology
Volume86
Issue number3
StatePublished - Jun 1 2000

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Litomosoides
Filarioidea
Onchocercidae
Phylogeny
nematode
phylogeny
Nematoda
monophyly
Gophers
parasite
Parasites
Nearctic Region
Thoracic Cavity
thoracic cavity
Neotropical Region
parasites
Marsupialia
alternative hosts
parsimony analysis
marsupial

ASJC Scopus subject areas

  • Parasitology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Phylogeny of species of the genus Litomosoides (Nematatoda : Onchocercidae): Evidence of rampant host switching. / Brant, Sara V.; Gardner, Scott L.

In: Journal of Parasitology, Vol. 86, No. 3, 01.06.2000, p. 545-554.

Research output: Contribution to journalArticle

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