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A preliminary phylogenetic analysis of the Capsalidae (Platyhelminthes: Monogenea: Monopisthocotylea) inferred from large subunit rDNA sequences

Published online by Cambridge University Press:  06 May 2004

I. D. WHITTINGTON
Affiliation:
Monogenean Research Laboratory, Parasitology Section, The South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia Marine Parasitology Laboratory, Environmental Biology, School of Earth and Environmental Sciences, The University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia
M. R. DEVENEY
Affiliation:
PIRSA Aquaculture, Primary Industry and Resources South Australia, GPO Box 1625, Adelaide, South Australia 5001, Australia
J. A. T. MORGAN
Affiliation:
Department of Microbiology and Parasitology, The University of Queensland, Brisbane, Queensland 4072, Australia Present address: Department of Plant and Microbial Biology, University of California Berkeley, CA 94720-3102, USA.
L. A. CHISHOLM
Affiliation:
Marine Parasitology Laboratory, Environmental Biology, School of Earth and Environmental Sciences, The University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia
R. D. ADLARD
Affiliation:
Department of Microbiology and Parasitology, The University of Queensland, Brisbane, Queensland 4072, Australia Biodiversity Program, Queensland Museum, PO Box 3300, South Brisbane, Queensland 4101, Australia

Abstract

Phylogenetic relationships within the Capsalidae (Monogenea) were examined using large subunit ribosomal DNA sequences from 17 capsalid species (representing 7 genera, 5 subfamilies), 2 outgroup taxa (Monocotylidae) plus Udonella caligorum (Udonellidae). Trees were constructed using maximum likelihood, minimum evolution and maximum parsimony algorithms. An initial tree, generated from sequences 315 bases long, suggests that Capsalinae, Encotyllabinae, Entobdellinae and Trochopodinae are monophyletic, but that Benedeniinae is paraphyletic. Analyses indicate that Neobenedenia, currently in the Benedeniinae, should perhaps be placed in a separate subfamily. An additional analysis was made which omitted 3 capsalid taxa (for which only short sequences were available) and all outgroup taxa because of alignment difficulties. Sequence length increased to 693 bases and good branch support was achieved. The Benedeniinae was again paraphyletic. Higher-level classification of the Capsalidae, evolution of the Entobdellinae and issues of species identity in Neobenedenia are discussed.

Type
Research Article
Copyright
2004 Cambridge University Press

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