Phylogenetic Relationships among Tick Subfamilies (Ixodida: Ixodidae: Argasidae) Based on the 18S Nuclear rDNA Gene

Phylogenetic relationships among tick subfamilies have been estimated using morphological and molecular characters. However, the phylogeny based on a portion of the 16S mitochondrial rDNA gene differed from the morphologically based phylogeny in a number of important respects. The entire 18S rDNA ge...

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Bibliographic Details
Published in:Molecular phylogenetics and evolution 1997-02, Vol.7 (1), p.129-144
Main Authors: Black, William C., Klompen, J.S.H., Keirans, James E.
Format: Article
Language:English
Subjects:
Animals
Base Sequence
DNA, Ribosomal - chemistry
DNA, Ribosomal - genetics
Ixodes - classification
Ixodes - genetics
Models, Genetic
Molecular Sequence Data
Nucleic Acid Conformation
Phylogeny
RNA, Ribosomal, 18S - chemistry
RNA, Ribosomal, 18S - genetics
Sequence Analysis, DNA
Ticks - classification
Ticks - genetics
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Summary:Phylogenetic relationships among tick subfamilies have been estimated using morphological and molecular characters. However, the phylogeny based on a portion of the 16S mitochondrial rDNA gene differed from the morphologically based phylogeny in a number of important respects. The entire 18S rDNA gene was examined in 18 taxa from all tick subfamilies to test the 16S rDNA based phylogeny. The 18S phylogeny supports the earlier 16S based phylogeny in placing members of Hyalomminae on a common branch with members of the Rhipicephalinae and in indicating long branch lengths among soft tick taxa. However, unlike the 16S phylogeny, Amblyomminae was monophyletic and members of Haemaphysalinae did not arise within Amblyomminae. Argasinae formed a monophyletic group within Argasidae and wasnota sister taxon of the hard ticks. In most respects, the phylogeny based on the 18S rDNA gene resembles the morphologically based phylogeny.
ISSN:1055-7903
1095-9513
DOI:10.1006/mpev.1996.0382