Publications by authors named "Ben J Mans"

The identity of Ixodes (Afrixodes) ugandanus Neumann, 1906 (Acari: Ixodidae) is established and its male and female are redescribed based on specimens collected on rodents (Rodentia: Muridae, Thryonomyidae) in Ethiopia and Uganda. Lectotype of I. ugandanus is designated here.

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Ticks play a crucial role in ecosystem dynamics and disease transmission, necessitating accurate species identification for epidemiological and ecological research. South Africa, despite occupying only 0.82 % of the world's land area, harbors approximately 11 % of global tick species richness.

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The Rhipicephalus sanguineus group, the brown dog ticks, are cosmopolitan and doubtless the most important ticks of domestic dogs, clinically and economically. Despite four decades of taxonomic enquiry with nucleotide sequences and morphology, the taxonomy of the R. sanguineus group is confused, even chaotic.

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Eleonora's falcon ( Géné, 1839) is a well-known long-distance migrant of the Afro-Palaearctic flyway, a summer breeder of the Mediterranean region and North-west Africa and a winter resident of Madagascar and surrounding areas, thus characterized as a double endemic. Within the context of a long-term monitoring and conservation programme on Antikythira Island, Greece, which accommodates one of the largest concentrations of breeding pairs of Eleonora's falcons globally, birds were subjected to regular inspections for the presence of ticks from 2017 to 2023. In total, 104 adults and 149 nymphs (all belonging to genus) were collected.

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The genus is notably diverse within the family Argasidae, comprising approximately 134 species distributed among 4 subgenera, 1 of which is the subgenus . In an earlier study, we identified distinct soft ticks as () sp., which were collected from animal shelters in Khyber Pakhtunkhwa, Pakistan.

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The genus Amblyomma contains the highest percentage of reptile-associated ticks, and comprises approximately nine subgenera. One of these subgenera is Adenopleura, which also encompasses Amblyomma javanense, and its type species Amblyomma compressum. This study describes a new Amblyomma species associated with Bengal monitor lizards (Varanus bengalensis) based on morphology and its mitogenome in Khyber Pakhtunkhwa, Pakistan.

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Ixodid ticks are obligate blood-feeding arthropods and important vectors of pathogens. In Mallorca, almost no data on the tick fauna are available. Herein, we investigated ticks and tick-borne pathogens in ticks collected from dogs, a cat and humans in Mallorca as result of a citizen science project.

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Ticks are composed of 3 extant families (Argasidae, Ixodidae and Nuttalliellidae) and 2 extinct families (Deinocrotonidae and Khimairidae). The Nuttalliellidae possess one extant species () limited to the Afrotropic region. A basal relationship to the hard and soft tick families and its limited distribution suggested an origin for ticks in the Afrotropics.

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Article Synopsis
  • - Two main tick families, Argasidae and Ixodidae, contain sub-families that show differences in physical and genetic traits, helping researchers understand their evolution.
  • - Molecular studies using mitochondrial DNA and ribosomal RNA confirm the classification of various tick genera and subgenera, providing clearer insight into their evolutionary relationships.
  • - The study focuses on resolving the classification of a controversial genus by analyzing its genomic data, ultimately placing it within Argasinae and suggesting another genus might be paraphyletic.
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Background: Amblyomma is the third most diversified genus of Ixodidae that is distributed across the Indomalayan, Afrotropical, Australasian (IAA), Nearctic and Neotropical biogeographic ecoregions, reaching in the Neotropic its highest diversity. There have been hints in previously published phylogenetic trees from mitochondrial genome, nuclear rRNA, from combinations of both and morphology that the Australasian Amblyomma or the Australasian Amblyomma plus the Amblyomma species from the southern cone of South America, might be sister-group to the Amblyomma of the rest of the world. However, a stable phylogenetic framework of Amblyomma for a better understanding of the biogeographic patterns underpinning its diversification is lacking.

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We used entire mitochondrial (mt) genome sequences (14.5-15 kbp) to resolve the phylogeny of the four main lineages of the Haematobothrion ticks: Alloceraea, Archaeocroton, Bothriocroton and Haemaphysalis. In our phylogenetic trees, Alloceraea was the sister to Archaeocroton sphenodonti, a tick of an archetypal reptile, the tuatara, from New Zealand, to the exclusion of the rest of the species of Haemaphysalis.

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Theileria parva are intracellular protozoal parasites responsible for three disease syndromes in cattle, namely East Coast fever (ECF), Corridor disease (CD) and Zimbabwean theileriosis. The increase in reports of CD outbreaks in recent years has raised questions about the probability of adaptation of buffalo-derived T. parva strains in cattle herds adjacent to game reserves.

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Paradigms in tick evolution.

Trends Parasitol

June 2023

The study of tick evolution may be classified into disciplines such as taxonomy and systematics, biogeography, evolution and development (evo-devo), ecology, and hematophagy. These disciplines overlap and impact each other to various extents. Advances in one field may lead to paradigm shifts in our understanding of tick evolution not apparent to other fields.

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Hard ticks feed for several days or weeks on their hosts and their saliva contains thousands of polypeptides belonging to dozens of families, as identified by salivary transcriptomes. Comparison of the coding sequences to protein databases helps to identify putative secreted proteins and their potential functions, directing and focusing future studies, usually done with recombinant proteins that are tested in different bioassays. However, many families of putative secreted peptides have a unique character, not providing significant matches to known sequences.

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Article Synopsis
  • Hoogstraal and Kim (1985) categorized Haemaphysalis ticks into three morphological groups, but recent nuclear gene analyses reveal no clear monophyly among these groups, with only limited mitochondrial genome data available.
  • The study aimed to clarify the phylogenetic relationships in Haemaphysalis, particularly involving the subgenus Alloceraea, by sequencing and analyzing 15 mitochondrial genomes and additional nuclear genes.
  • Findings included distinct genetic insertions in the mt genomes and phylogenetic placements that support evolutionary hypotheses regarding eye development in ticks, while also demonstrating a lack of support for the traditional morphological groupings in Haemaphysalis.
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The mitochondrial genome (mitogenome) has proven to be important for the taxonomy, systematics, and population genetics of ticks. However, current methods to generate mitogenomes can be cost-prohibitive at scale. To address this issue, we developed a cost-effective approach to amplify and sequence the whole mitogenome of individual tick specimens.

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Three examples of metastriate hard ticks (Ixodida: Ixodidae) with apparent affinities to modern Australasian genera are described from the mid-Cretaceous (ca. 100 Ma) Burmese amber of Myanmar. Two nymphs of sp.

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The genus Haemaphysalis Koch, 1844 (Acari: Ixodidae) is the second-largest genus, with more than 170 described species that primarily parasitize mammals and birds (Guglielmone et al. 2014, Guglielmone et al. 2020).

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Distinct life stages may experience different selection pressures influencing phenotypic evolution. Morphological evolution is also constrained by early phenotypes, since early development forms the phenotypic basis of later development. This work investigates evolutionary-developmental modification in three life stages and both sexes of 24 Rhipicephalus species using phylogenetic comparative methods for geometric morphometrics of basis capituli (basal mouthpart structure used for host attachment), and scutum or conscutum areas (proxy for overall body size).

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The study reports the finding of a nymph attached to a German tourist during a holiday in South Africa. The nymph specimen was morphologically identified and confirmed by sequence analysis of the 16S rRNA and 12S rRNA genes. The nymph was identified as Rhipicephalus maculatus, a rare tick reported in humans.

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