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Phylogenetic analysis of the genus Megalobatrachonema Yamaguti, 1941 (Ascaridida:Cosmocercoidea:Kathlaniidae) with field and laboratory observations of M. Waldeni Richardson, Jane P.M.

Abstract

The genus Megalobatrachonema (Family Kathlaniidae; Order Ascaridida) was investigated using phylogenetic analysis. A single cladogram was produced with a consistency index of 92.6%. Six species were found valid, two of which are new. Division of the genus into subgenera Megalobatrachonema and Chabaudqolvania was not supported by the phylogenetic hypothesis. Comparison of host and parasite phylogenies suggest that at least two instances of host switching have occurred. Biogeographical analysis of parasites and hosts indicated that vicariance, rather than dispersal, best explains distribution of five of the six. Field and laboratory observations on one of the more evolved species of the genus, M. waldeni, suggests that there is probably a single generation a year, and that transmission to the definitive host occurs in spring and early summer.

Item Metadata

Title
Phylogenetic analysis of the genus Megalobatrachonema Yamaguti, 1941 (Ascaridida:Cosmocercoidea:Kathlaniidae) with field and laboratory observations of M. Waldeni
Creator
Richardson, Jane P.M.
Publisher
University of British Columbia
Date Issued
1988
Description
The genus Megalobatrachonema (Family Kathlaniidae; Order Ascaridida) was investigated using phylogenetic analysis. A single cladogram was produced with a consistency index of 92.6%. Six species were found valid, two of which are new. Division of the genus into subgenera Megalobatrachonema and Chabaudqolvania was not supported by the phylogenetic hypothesis. Comparison of host and parasite phylogenies suggest that at least two instances of host switching have occurred. Biogeographical analysis of parasites and hosts indicated that vicariance, rather than dispersal, best explains distribution of five of the six. Field and laboratory observations on one of the more evolved species of the genus, M. waldeni, suggests that there is probably a single generation a year, and that transmission to the definitive host occurs in spring and early summer.
Genre
Thesis/Dissertation
Type
Text
Language
eng
Date Available
2010-09-09
Provider
Vancouver : University of British Columbia Library
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
DOI
10.14288/1.0097822
URI
http://hdl.handle.net/2429/28321
Degree
Master of Science - MSc
Program
Zoology
Affiliation
Science, Faculty of; Zoology, Department of
Degree Grantor
University of British Columbia
Campus
UBCV
Scholarly Level
Graduate
Aggregated Source Repository
DSpace

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For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.