J. E. Keirans

Publications199
h-index40
Citations6,258
Highly Influential Citations423
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ANALYSIS OF THE SYSTEMATIC RELATIONSHIPS AMONG TICKS OF THE GENERA RHIPICEPHALUS AND BOOPHILUS (ACARI: IXODIDAE) BASED ON MITOCHONDRIAL 12S RIBOSOMAL DNA GENE SEQUENCES AND MORPHOLOGICAL CHARACTERS
A portion of mitochondrial 12S rDNA sequences (337–355 base pairs) and 63 morphological characters of 36 hard-tick species belonging to 7 genera were analyzed to determine the phylogenetic… Expand
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Ticks of Venezuela (Acarina: Ixodoidea) with a key to the species of Ambiyomma in the western hemisphere
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Population genetics of Ixodes scapularis (Acari: Ixodidae) based on mitochondrial 16S and 12S genes.
Blacklegged tick, Ixodes scapularis Say, is the principal vector of Borrelia burgdorferi Johnson, Schmid, Hyde, Steigerwalt & Brenner in the eastern half of the United States. Populations exhibit… Expand
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The Argasidae, Ixodidae and Nuttalliellidae (Acari: Ixodida): A World List of Valid Tick Names
The world's argasid tick fauna comprises 183 species in four genera, namely Argas, Carios, Ornithodoros and Otobius in the family Argasidae. The ixodid tick fauna consists of 241 species in the genus… Expand
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Ixodes (Ixodes) scapularis (Acari:Ixodidae): redescription of all active stages, distribution, hosts, geographical variation, and medical and veterinary importance.
The blacklegged tick, Ixodes (Ixodes) scapularis Say, 1821, is redescribed, based on laboratory reared specimens originating in Bulloch County, Georgia. Information on distribution, host… Expand
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Nymphs of the genus Ixodes (Acari: Ixodidae) of the United States: taxonomy, identification key, distribution, hosts, and medical/veterinary importance.
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Evolution of ticks.
Evolutionary patterns in ticks have traditionally been cast in terms of host associations. Largely untested assumptions of cospeciation and observations of current host associations are used to… Expand
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Idiosomal lyrifissures, Setae, and small glands as taxonomic characters and potential indicators of ancestral segmentation patterns in larval ixodidae (Acari: Ixodida)
Abstract Variability in idiosomal chaetotaxy, lyrifissure, and gland patterns among ixodid larvae is assessed based on a comparative analysis of these structures in 53 species of ixodid ticks. A… Expand
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Systematics and Biogeography of Hard Ticks, a Total Evidence Approach
Systematic relationships among the basal Ixodidae are examined using one morphological and three molecular data sets, 18S and 28S nuclear and 16S mitochondrial rDNA. Although different combinations… Expand
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Distribution, Seasonality, and Hosts of the Rocky Mountain Wood Tick in the United States
Abstract Anaplasma marginale Theiler is a tick-borne pathogen that causes anaplasmosis in cattle. There are ≈20 tick species worldwide that are implicated as vectors of this pathogen. In the United… Expand
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