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Argasidae

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Alberto A. Guglielmone – 1st expert on this subject based on the ideXlab platform

  • Ticks (Acari: Ixodoidea: Argasidae, Ixodidae) of Chile.
    Experimental & applied acarology, 2020
    Co-Authors: Daniel González-acuña, Alberto A. Guglielmone

    Abstract:

    The tick species recorded from Chile can be listed under the following headings: (1) endemic or established: Argas keiransi Estrada-Peña, Venzal and Gonzalez-Acuña, A. neghmei Kohls and Hoogstraal; Ornithodoros amblus Chamberlin; Otobius megnini (Dugès); Amblyomma parvitarsum Neumann; A. tigrinum Koch; Ixodes auritulus Neumann; I. chilensis Kohls; I. cornuae Arthur, I. sigelos Keirans, Clifford and Corwin; I. stilesi Neumann; I. uriae White; Rhipicephalus sanguineus Koch. (2) Probably established or endemic: Argas miniatus Koch; Ornithodoros spheniscus Hoogstraal, Wassef, Hays and Keirans; Ixodes abrocomae Lahille; I. neuquenensis Ringuelet; I. pararicinus Keirans and Clifford. (3) Doubtfully established: Argas reflexus Fabricius; Ornithodoros talaje (Guérin-Méneville). (4) Exotic: Amblyomma argentinae Neumann; A. latum Koch, Rhipicephalus (= Boophilus) microplus (Canestrini). (5) Erroneously identified as present in Chile: Amblyomma americanum (Linnaeus); A. maculatum Koch; A. varium Koch; Ixodes conepati Cooley and Kohls; I. frontalis (Panzer); I. ricinus (Linnaeus); Margaropus winthemi Karsch. (6) Nomina nuda: Argas reticulatus Gervais; Amblyomma inflatum Neumann; Ixodes lagotis Gervais. Hosts and localities (including new records) are presented. Argas neghmei, O. amblus, O. megnini, I. uriae and R. sanguineus may cause severe injury to their hosts, including humans. The Chilean Ixodes fauna is unique to the Neotropical Zoogeographic Region, and additional research is needed in order to understand the biological importance of these species.

  • Genera and Species of Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Distribution, hosts, notes on ecology, and sanitary importance along with taxonomical considerations and morphological diagnosis for adults and larvae are provided for the 18 species of Argasidae (5 Argas , 12 Ornithodoros , and 1 species of Otobius ) established in the Southern Cone of America. A condensed phylogenetic tree based on mitochondrial 16S rDNA sequences is included to show the relationship among species. There is controversy about the presence of A. miniatus and A. persicus but we provisionally considered both as found in the region. Or. capensis is treated as established in one southern country (Chile) by other workers but this fact is still unproven. Several species are of medical relevance but additional efforts have to be made to know their role as vector of diseases. The genus Ornithodoros is of special phylogenetic interest and deserves additional studies to understand life history of Argasidae, and to find adults of some species that are known only by the larva.

  • Morphological Keys for Genera and Species of Ixodidae and Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Dichotomous keys using morphological external characters were constructed to identify genera and species of Argasidae and Ixodidae, except the genera Dermacentor (Ixodidae) and Otobius (Argasidae) with only one species each in the Southern Cone of America. No key for ixodid larvae is given due to insufficient information. Males, females, and nymphs of all Amblyomma (25 species), Haemaphysalis (2), and Rhipicephalus (2 species) are included but 6 males and 5 nymphs of the 16 species of Ixodes are unknown or imprecisely described. The situation for Argasidae (5 Argas and 12 Ornithodoros ) is different because larvae morphology is relevant for specific diagnosis, especially for Ornithodoros , and less so for adult ticks. Therefore, keys are presented for larvae and adult ticks as differences between male and female ticks are morphologically irrelevant, but adult ticks of five species of Ornithodoros are unknown. No keys for nymphs of Argasidae are presented because their external characters are similar to the corresponding adults.

José Manuel Venzal – 2nd expert on this subject based on the ideXlab platform

  • Genera and Species of Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Distribution, hosts, notes on ecology, and sanitary importance along with taxonomical considerations and morphological diagnosis for adults and larvae are provided for the 18 species of Argasidae (5 Argas , 12 Ornithodoros , and 1 species of Otobius ) established in the Southern Cone of America. A condensed phylogenetic tree based on mitochondrial 16S rDNA sequences is included to show the relationship among species. There is controversy about the presence of A. miniatus and A. persicus but we provisionally considered both as found in the region. Or. capensis is treated as established in one southern country (Chile) by other workers but this fact is still unproven. Several species are of medical relevance but additional efforts have to be made to know their role as vector of diseases. The genus Ornithodoros is of special phylogenetic interest and deserves additional studies to understand life history of Argasidae, and to find adults of some species that are known only by the larva.

  • Morphological Keys for Genera and Species of Ixodidae and Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Dichotomous keys using morphological external characters were constructed to identify genera and species of Argasidae and Ixodidae, except the genera Dermacentor (Ixodidae) and Otobius (Argasidae) with only one species each in the Southern Cone of America. No key for ixodid larvae is given due to insufficient information. Males, females, and nymphs of all Amblyomma (25 species), Haemaphysalis (2), and Rhipicephalus (2 species) are included but 6 males and 5 nymphs of the 16 species of Ixodes are unknown or imprecisely described. The situation for Argasidae (5 Argas and 12 Ornithodoros ) is different because larvae morphology is relevant for specific diagnosis, especially for Ornithodoros , and less so for adult ticks. Therefore, keys are presented for larvae and adult ticks as differences between male and female ticks are morphologically irrelevant, but adult ticks of five species of Ornithodoros are unknown. No keys for nymphs of Argasidae are presented because their external characters are similar to the corresponding adults.

  • description of a new soft tick species acari Argasidae ornithodoros parasite of octodon degus rodentia octodontidae in northern chile
    Ticks and Tick-borne Diseases, 2020
    Co-Authors: Sebastian Munozleal, José Manuel Venzal, Santiago Nava, Thiago F. Martins, Arlei Marcili, Daniel Gonzalezacuna, Marcelo B Labruna

    Abstract:

    Abstract A new argasid (Argasidae) tick is herein described based on morphology and molecular data obtained from larvae parasitizing Octodon degus and from ticks collected inside burrows in northern Chile. Unfed laboratory-reared larvae were mounted in slides for morphometrical and morphological analyses. Larvae of Ornithodoros octodontus n. sp. share morphological traits with Ornithodoros quilinensis and Ornithodoros xerophylus, two species associated with rodents in the Argentinean Chaco. However, a longer hypostome with two rows of 21 and 22 denticles each one, and conspicuous leaf-shaped anal plates separate O. octodontus. While nymphal stages of O. octodontus lack cheeks and possess a micromammillated dorsal integument, adults have cheeks and exhibit markedly irregular mammillae along their dorsal surface. Phylogenetic analyses of neotropical Argasidae based on mitochondrial 16S rDNA sequences point that O. octodontus forms a monophyletic group with O. xerophylus and an unidentified Ornithodoros sp. from Bolivia, all of them associated with burrow-dweller rodents. Ornithodoros aragaoi and Ornithodoros davisi, two rare species collected once only in the Peruvian Andean Plateau during 1955 are morphologically closely related with adults and nymphs of O. octodontus. Biological observations of O. octodontus revealed autogenic females. For the moment, subgeneric classification of this new species depends on further biological studies. The fauna of ticks occurring in Chile is now represented by 22 species, 11 belonging to the Argasidae family.

Santiago Nava – 3rd expert on this subject based on the ideXlab platform

  • new records and phylogenetic position of ornithodoros knoxjonesi ixodida Argasidae
    Ticks and Tick-borne Diseases, 2020
    Co-Authors: Carmen Guzmancornejo, Santiago Nava, Sebastian Munozleal, Marcelo B Labruna, Andrea Rebollohernandez, Adriana Troyo, Rolando D Moreirasoto, Ligia V Hernandez, Jose M Venzal

    Abstract:

    Abstract Larvae of Ornithodoros knoxjonesi collected at five localities in three countries were studied using morphological and molecular methods to confirm this species’ taxonomic validity. The larva of O. knoxjonesi is characterized as having 14 pairs of dorsal setae, eight pairs of ventral setae, plus a posteromedian seta; an elongate dorsal plate, tapered anteriorly; and a hypostome that is narrower near its midlength, with posteriorly projecting denticles. Although the larvae of O. knoxjonesi and Ornithodoros peropteryx are morphologically quite similar, the larva of O. knoxjonesi is characterized as having dorsal setae that are wider at the tip than at the base, while in O. peropteryx these setae are narrower at the tip than at the base; moreover, the dorsal setae are shorter in O. knoxjonesi (Al 0.037–0.065; Pl 0.035–0.059) than in O. peropteryx (Al 0.120−0.132; Pl 0.080−0.096). These species also differ in that O. knoxjonesi possesses only the Al seta on tarsus I, whereas O. peropteryx has both Al and Pl setae. And while both species have two setae on coxae I-III, in O. knoxjonesi the anterior seta is tapering and smooth and the posterior is fringed, while both setae are fringed in O. peropteryx. At the molecular level, based on a maximum likelihood analysis using approximately 400 bp of the mitochondrial 16S rDNA gene, O. knoxjonesi appears as an independent lineage, separated from O. peropteryx by a genetic distance of 16.28 %. Balantiopteryx plicata is a common host of O. knoxjonesi; however, in this work we report Pteronotus personatus and Pteronotus gymnonotus as new hosts of this tick species.

  • Genera and Species of Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Distribution, hosts, notes on ecology, and sanitary importance along with taxonomical considerations and morphological diagnosis for adults and larvae are provided for the 18 species of Argasidae (5 Argas , 12 Ornithodoros , and 1 species of Otobius ) established in the Southern Cone of America. A condensed phylogenetic tree based on mitochondrial 16S rDNA sequences is included to show the relationship among species. There is controversy about the presence of A. miniatus and A. persicus but we provisionally considered both as found in the region. Or. capensis is treated as established in one southern country (Chile) by other workers but this fact is still unproven. Several species are of medical relevance but additional efforts have to be made to know their role as vector of diseases. The genus Ornithodoros is of special phylogenetic interest and deserves additional studies to understand life history of Argasidae, and to find adults of some species that are known only by the larva.

  • Morphological Keys for Genera and Species of Ixodidae and Argasidae
    Ticks of the Southern Cone of America, 2020
    Co-Authors: Santiago Nava, José Manuel Venzal, Daniel González-acuña, Thiago F. Martins, Alberto A. Guglielmone

    Abstract:

    Dichotomous keys using morphological external characters were constructed to identify genera and species of Argasidae and Ixodidae, except the genera Dermacentor (Ixodidae) and Otobius (Argasidae) with only one species each in the Southern Cone of America. No key for ixodid larvae is given due to insufficient information. Males, females, and nymphs of all Amblyomma (25 species), Haemaphysalis (2), and Rhipicephalus (2 species) are included but 6 males and 5 nymphs of the 16 species of Ixodes are unknown or imprecisely described. The situation for Argasidae (5 Argas and 12 Ornithodoros ) is different because larvae morphology is relevant for specific diagnosis, especially for Ornithodoros , and less so for adult ticks. Therefore, keys are presented for larvae and adult ticks as differences between male and female ticks are morphologically irrelevant, but adult ticks of five species of Ornithodoros are unknown. No keys for nymphs of Argasidae are presented because their external characters are similar to the corresponding adults.