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  • 1995-1999  (2)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    18S rRNA gene sequences and phylogenetic relationships of European hard-tick species (Acari: Ixodidae) (1997)
    Springer
    Parasitology research 84 (1997), S. 31-37 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The complete 18S rRNA gene sequences of the following six European hard-tick species were obtained by direct PCR cycle sequencing and silver-staining methods: Rhipicephalus pusillus, Boophilus annulatus, Dermacentor marginatus, Hyalomma lusitanicum, Haemaphysalis punctata, and Ixodes ricinus. Differences observed in the sequence alignment of these six species together with the 18S rRNA gene sequences of 13 other hard-tick species demonstrate that this gene is a good marker for supraspecific differentiation as well as genus grouping among hard ticks. Phylogenetic analyses strongly support that Hyalomma species share a common ancestor with Rhipicephalinae and, consequently, Hyalomminae should no longer be considered an independent subfamily. However, no definitive conclusion could be reached to support or oppose the separation of the subfamilies Haemaphysalinae and Amblyomminae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050352
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mitochondrial 16S rDNA sequences and phylogenetic relationships of species of Rhipicephalus and other tick genera among Metastriata (Acari: Ixodidae) (1998)
    Springer
    Parasitology research 84 (1998), S. 478-484 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The mitochondrial 16S rRNA gene sequences of the following eight European Metastriata tick species were obtained by direct polymerase-chain-reaction cycle sequencing and silver-staining methods: Rhipicephalus bursa, R. pusillus, R. sanguineus, R. turanicus, Boophilus annulatus, Dermacentor marginatus, Haemaphysalis punctata, and Hyalomma lusitanicum. This mitochondrial gene seems to be a good marker for the establishment of genetic relationships among closely related tick species, but it does not seem to be useful for comparisons of distantly related taxa. The molecular data provide very strong support for the monophyly of the Rhipicephalinae, including Hyalomma spp. However, the genus Rhipicephalus may not be considered a monophyletic group; in all analyses carried out in this study, R. bursa clustered with Boophilus spp. The high percentage of similarity (98.7%) observed between R.␣sanguineus and R. turanicus sequences would suggest that these species recently diverged within the Rhipicephalus genus. Phylogenetic analyses showed a monophyletic relationship among Amblyomminae taxa. The relationships between Haemaphysalis species and the true placement of this genus within Metastriata could not be resolved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050433
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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