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Alberto A. Guglielmone - One of the best experts on this subject based on the ideXlab platform.
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Ticks (Acari: Ixodoidea: Argasidae, Ixodidae) of Chile.
Experimental & applied acarology, 2020Co-Authors: Daniel González-acuña, Alberto A. GuglielmoneAbstract: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.
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Genera and Species of Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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Morphological Keys for Genera and Species of Ixodidae and Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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the ticks acari ixodida Argasidae ixodidae of bolivia
Ticks and Tick-borne Diseases, 2014Co-Authors: Mariano Mastropaolo, Fabian L Beltransaavedra, Alberto A. GuglielmoneAbstract:Abstract The tick species reported in Bolivia are reviewed here as (1) endemic or established: Ornithodoros echimys , O. guaporensis , O. hasei , O. kohlsi , O. mimon , O. peropteryx , O. rostratus , Otobius megnini , Amblyomma auricularium , A. cajennense , A. calcaratum , A. coelebs , A. dubitatum , A. humerale , A. incisum , A. longirostre , A. naponense , A. nodosum , A. oblongoguttatum , A. ovale , A. parvitarsum , A. parvum , A. pecarium , A. pseudoconcolor , A. rotundatum , A. scalpturatum , A. tigrinum , A. triste , Dermacentor nitens , Haemaphysalis juxtakochi , H. leporispalustris , I. boliviensis , I. cooleyi , I. luciae , Rhipicephalus microplus , R. sanguineus , and (2) erroneously reported: Ornithodoros puertoricensis , O. talaje , O. turicata , Amblyomma americanum , A. maculatum , A. multipunctum , Ixodes ricinus , I. scapularis , Rhipicephalus annulatus . Many of these records are lacking locality and/or host, and some of them need new findings for confirmation. Some of the species recorded may represent a threat for human and animal health, therefore would be of great value to make a countrywide survey of ticks in order to update the information presented in this work.
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a new species of ornithodoros acari Argasidae parasite of microlophus spp reptilia tropiduridae from northern chile
Ticks and Tick-borne Diseases, 2013Co-Authors: José Manuel Venzal, Paula Lado, Atilio J Mangold, Santiago Nava, Sebastian Munozleal, Daniel Gonzalezacuna, Alberto A. GuglielmoneAbstract:Abstract A new species, Ornithodoros microlophi (Acari: Argasidae), belonging to the subgenus Alectorobius is described from larvae collected on the lizards Microlophus atacamensis (Donoso-Barros, 1966) and Microlophus quadrivittatus (Tschudi, 1845) (Squamata: Tropiduridae) in continental and insular localities from northern Chile. Larvae of O. microlophi can be distinguished from other Neotropical species of the genus Ornithodoros by a combination of the following characters, namely 10 pairs of ventral setae, venter with 6 pairs of sternal setae, dorsal plate pyriform, 19–21 pairs of dorsal setae (typically 20), 13 pairs are dorsolateral and 7 pairs are central, and hypostome with dental formula 4/4 in medial portion and apex pointed. Phylogenetic analysis of 16S rDNA sequences suggests that O. microlophi represents an independent lineage within Neotropical species of the Argasidae.
José Manuel Venzal - One of the best experts on this subject based on the ideXlab platform.
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Genera and Species of Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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Morphological Keys for Genera and Species of Ixodidae and Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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description of a new soft tick species acari Argasidae ornithodoros parasite of octodon degus rodentia octodontidae in northern chile
Ticks and Tick-borne Diseases, 2020Co-Authors: Sebastian Munozleal, Santiago Nava, José Manuel Venzal, Thiago F. Martins, Arlei Marcili, Daniel Gonzalezacuna, Marcelo B LabrunaAbstract: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.
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The Nothoaspis amazoniensis Complete Mitogenome: A Comparative and Phylogenetic Analysis
Veterinary Sciences, 2018Co-Authors: Paulo Henrique Costa De Lima, Pedro Marcus Pereira Vidigal, Raphael Contelli Klein, Carlos Emmanuel Montandon, Mary Hellen Fabres-klein, Jorge Abdala Dergam, Rafael Mazioli Barcelos, José Manuel Venzal, Claudio MafraAbstract:The molecular biology era, together with morphology, molecular phylogenetics, bioinformatics, and high-throughput sequencing technologies, improved the taxonomic identification of Argasidae family members, especially when considering specimens at different development stages, which remains a great difficulty for acarologists. These tools could provide important data and insights on the history and evolutionary relationships of argasids. To better understand these relationships, we sequenced and assembled the first complete mitochondrial genome of Nothoaspis amazoniensis. We used phylogenomics to identify the evolutionary history of this species of tick, comparing the data obtained with 26 complete mitochondrial sequences available in biological databases. The results demonstrated the absence of genetic rearrangements, high similarity and identity, and a close organizational link between the mitogenomes of N. amazoniensis and other argasids analyzed. In addition, the mitogenome had a monophyletic cladistic taxonomic arrangement, encompassed by representatives of the Afrotropical and Neotropical regions, with specific parasitism in bats, which may be indicative of an evolutionary process of cospeciation between vectors and the host.
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The presence of Argas keiransi Estrada-Peña, Venzal & González- Acuña, 2003 (Acari: Argasidae) in Argentina
Systematic & Applied Acarology, 2014Co-Authors: José Manuel Venzal, Fernando S. Flores, Claudina Solaro, Miguel A. Santillán, A.j. Mangold, Santiago NavaAbstract:Forty-two larvae of Argas keiransi (Acari: Argasidae) were collected from the Chimango Caracara, Milvago chimango (Falconiformes: Falconidae), at three localities in La Pampa Province, Argentina. Ticks were determined by a combination of palpal segment IV as long as or longer than the other palpal segments, absence
Santiago Nava - One of the best experts on this subject based on the ideXlab platform.
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new records and phylogenetic position of ornithodoros knoxjonesi ixodida Argasidae
Ticks and Tick-borne Diseases, 2020Co-Authors: Carmen Guzmancornejo, Santiago Nava, Sebastian Munozleal, Marcelo B Labruna, Andrea Rebollohernandez, Adriana Troyo, Rolando D Moreirasoto, Ligia V Hernandez, Jose M VenzalAbstract: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.
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Genera and Species of Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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Morphological Keys for Genera and Species of Ixodidae and Argasidae
Ticks of the Southern Cone of America, 2020Co-Authors: Santiago Nava, Daniel González-acuña, José Manuel Venzal, Thiago F. Martins, Alberto A. GuglielmoneAbstract: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.
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description of a new soft tick species acari Argasidae ornithodoros parasite of octodon degus rodentia octodontidae in northern chile
Ticks and Tick-borne Diseases, 2020Co-Authors: Sebastian Munozleal, Santiago Nava, José Manuel Venzal, Thiago F. Martins, Arlei Marcili, Daniel Gonzalezacuna, Marcelo B LabrunaAbstract: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.
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redescription of ornithodoros dyeri ixodida Argasidae based on morphologic and molecular data
Ticks and Tick-borne Diseases, 2016Co-Authors: Carmen Guzmancornejo, Santiago Nava, Jose M Venzal, Luis Garciaprieto, Sokani Sanchezmontes, Griselda MontielparraAbstract:Abstract Larvae, nymphs and adults of the cave dwelling tick Ornithodoros dyeri , collected in 3 Mexican states, were studied using morphological and molecular methods. The adults and nymphs were characterized by an elongated body in proportion to the width and a dorsum bounded by two contiguous ridges and one third ridge (inner) that was incomplete on each side. The larvae of this species have 14 pairs of dorsal setae, a venter body with nine pairs of setae plus a posteromedian; a moderately large, dorsal plate and piriform, a hypostome arising from a relatively short, subtriangular median extension of the basis capituli, and a capsule of Halleŕs organ with reticulations. Based on a maximum likelihood analysis of the sequences of a fragment of approximately 414 bp of the mitochondrial 16S rRNA gene, we showed that O. dyeri represents an independent lineage within neotropical species of the Argasidae. The bat species Mimon cozumelae and Peropteryx macrotis represents a new host record for this argasid.
Sebastian Munozleal - One of the best experts on this subject based on the ideXlab platform.
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new records and phylogenetic position of ornithodoros knoxjonesi ixodida Argasidae
Ticks and Tick-borne Diseases, 2020Co-Authors: Carmen Guzmancornejo, Santiago Nava, Sebastian Munozleal, Marcelo B Labruna, Andrea Rebollohernandez, Adriana Troyo, Rolando D Moreirasoto, Ligia V Hernandez, Jose M VenzalAbstract: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.
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description of a new soft tick species acari Argasidae ornithodoros parasite of octodon degus rodentia octodontidae in northern chile
Ticks and Tick-borne Diseases, 2020Co-Authors: Sebastian Munozleal, Santiago Nava, José Manuel Venzal, Thiago F. Martins, Arlei Marcili, Daniel Gonzalezacuna, Marcelo B LabrunaAbstract: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.
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ticks ixodida Argasidae ixodidae of brazil updated species checklist and taxonomic keys
Ticks and Tick-borne Diseases, 2019Co-Authors: Filipe Dantastorres, Valeria C Onofrio, Thiago F. Martins, Sebastian Munozleal, Darci Moraes BarrosbattestiAbstract:Ticks are ectoparasites of great medical and veterinary significance in the neotropical region. In Brazil, they are responsible for enormous economic losses to the livestock industry and also for considerable morbidity and mortality in companion animals and humans. Therefore, recognizing the identity of a given species is important, not only from a biodiversity perspective, but also from the medical and veterinary standpoints. The Brazilian tick fauna is one of the most diverse and well-studied in the neotropical region. In the past few years, several new species were discovered and/or recorded for the first time in this country. The main objectives of this study were to provide an updated list of tick species occurring in Brazil and taxonomic keys for their identification. The updated list of Brazilian ticks includes 70 species, 47 in the family Ixodidae and 23 in the family Argasidae. The genera Amblyomma (32 spp.) and Ornithodoros (18 spp.) are the most representative. Updated taxonomic keys for the identification of ticks of Brazil are provided. Finally, the medico-veterinary significance of ticks occurring in this country is briefly discussed.
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first record of ornithodoros faccinii acari Argasidae on toads of genus rhinella anura bufonidae in brazil
Revista Brasileira De Parasitologia Veterinaria, 2018Co-Authors: Bruna Barboza Bezerra, Sebastian Munozleal, Arlei Marcili, Walter Flausino, Joao Luiz Horacio FacciniAbstract:: Although a group of soft ticks (Argasidae) associated with amphibians was recently discovered in Brazilian rainforests, parasitism by these ticks on cold-blooded animals remains less common than on mammal and bird species. In this study, we identified ticks that were collected from toads that had been caught in December 2016 and January 2017, at Itingucu waterfall (22°54'05" S; 43°53'30" W) in the municipality of Itaguai, state of Rio de Janeiro. Tick specimens were identified using a morphological and molecular approach. In total, twelve larvae of Ornithodoros ticks were collected from three individuals of Rhinella ornata and were identified as Ornithodoros faccinii. Our results include a longer 16S rRNA mitochondrial sequence for O. faccinii that supports its phylogenetic relatedness to Ornithodoros saraivai, and we report this tick species parasitizing Rhinella toads for the first time in Brazil.
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a new species of ornithodoros acari Argasidae parasite of microlophus spp reptilia tropiduridae from northern chile
Ticks and Tick-borne Diseases, 2013Co-Authors: José Manuel Venzal, Paula Lado, Atilio J Mangold, Santiago Nava, Sebastian Munozleal, Daniel Gonzalezacuna, Alberto A. GuglielmoneAbstract:Abstract A new species, Ornithodoros microlophi (Acari: Argasidae), belonging to the subgenus Alectorobius is described from larvae collected on the lizards Microlophus atacamensis (Donoso-Barros, 1966) and Microlophus quadrivittatus (Tschudi, 1845) (Squamata: Tropiduridae) in continental and insular localities from northern Chile. Larvae of O. microlophi can be distinguished from other Neotropical species of the genus Ornithodoros by a combination of the following characters, namely 10 pairs of ventral setae, venter with 6 pairs of sternal setae, dorsal plate pyriform, 19–21 pairs of dorsal setae (typically 20), 13 pairs are dorsolateral and 7 pairs are central, and hypostome with dental formula 4/4 in medial portion and apex pointed. Phylogenetic analysis of 16S rDNA sequences suggests that O. microlophi represents an independent lineage within Neotropical species of the Argasidae.
Marcelo B Labruna - One of the best experts on this subject based on the ideXlab platform.
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new records and phylogenetic position of ornithodoros knoxjonesi ixodida Argasidae
Ticks and Tick-borne Diseases, 2020Co-Authors: Carmen Guzmancornejo, Santiago Nava, Sebastian Munozleal, Marcelo B Labruna, Andrea Rebollohernandez, Adriana Troyo, Rolando D Moreirasoto, Ligia V Hernandez, Jose M VenzalAbstract: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.
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description of a new soft tick species acari Argasidae ornithodoros parasite of octodon degus rodentia octodontidae in northern chile
Ticks and Tick-borne Diseases, 2020Co-Authors: Sebastian Munozleal, Santiago Nava, José Manuel Venzal, Thiago F. Martins, Arlei Marcili, Daniel Gonzalezacuna, Marcelo B LabrunaAbstract: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.
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nothoaspis reddelli keirans clifford 1975 acari ixodida Argasidae distribution extension
Check List, 2015Co-Authors: Jose M Venzal, Marcelo B Labruna, Ligia V Hernandez, Santiago NavaAbstract:The first record of Nothoaspis reddelli (nymph) in Nicaragua is presented. The morphological characters used for the determination were dorsum with a false shield or nothoaspis, presence of an anteriorly projecting hood covering half of the capitulum, medial extension of palpal article I (flaps), presence of two large setae on internal margins of flaps, leg coxae with numerous long setae, and hypostome long and pointed with apical dentition 4/4. The 16S rDNA sequence of N. reddelli from Nicaragua was identical to the 16S sequence of N. reddelli from Mexico.
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ornithodoros guaporensis acari ixodida Argasidae a new tick species from the guapore river basin in the bolivian amazon
Zootaxa, 2013Co-Authors: Jose Venzal Santiago M Nava, Atilio J Mangold, Flavio A Terassini, Luis Marcelo Aranha Camargo, Gustavo Casas, Marcelo B LabrunaAbstract:The soft tick Ornithodoros guaporensis n. sp. (Acari: Ixodida: Argasidae) is described from larvae and adults. Morpho-logical analysis and 16S rDNA sequences are provided. Adults were collected from a rocky fissure inhabited by bats lo-cated in the Amazonian forest in north-eastern Bolivia (Beni Department) close to the Guapore River. Larvae were obtained from eggs laid by females collected in the field, and which were fed on rabbits in the laboratory. Larvae of O. guaporensis are morphologically closely related to Ornithodoros rioplatensis, Ornithodoros puertoricensis and Orni-thodoros talaje . Larvae of O. guaporensis and O. rioplatensis can be separated from O. puertoricensis and O. talaje by the number of pairs of dorsal setae (20 in O. guaporensis and O. rioplatensis , 18 in O. puertoricensis and 17 in O. talaje ) . Larvae of O. guaporensis and O. rioplatensis can be differentiated by the medial dental formula (2/2 in O. guaporensis and 3/3 in O. rioplatensis ) and the apex of the hypostome, which is more pointed in O. rioplatensis than in O. guaporensis . The Principal Component Analysis performed with morphometric characters of larvae showed a clear separation among O. guaporensis, O. rioplatensis, O. puertoricensis and O. talaje . Significant morphological differences among adults of these four species were not found. The analysis of the 16S rDNA sequences allowed for the differentiation between O. guaporensis and the remaining Neotropical species of the family Argasidae.
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coxiella symbiont in the tick ornithodoros rostratus acari Argasidae
Ticks and Tick-borne Diseases, 2012Co-Authors: Aliny P Almeida, Arlei Marcili, R C Leite, Fernanda A Nieribastos, Luisa N Domingues, Joao Ricardo Martins, Marcelo B LabrunaAbstract:Abstract In the present study, the presence of tick-associated bacteria and protozoa in Ornithodoros rostratus ticks (adults, nymphs, and eggs) from the Pantanal region of Brazil were determined by molecular detection. In these ticks, DNA from protozoa in the genera Babesia and Hepatozoon , and bacteria from the genera Rickettsia , Borrelia , Anaplasma , and Ehrlichia were not detected. Conversely, all tested ticks (100%) yielded PCR products for 3 Coxiella genes (16S rRNA, pyrG , cap ). PCR and phylogenetic analysis of 3 amplified genes (16S rRNA, pyrG , cap ) demonstrated that the agent infecting O. rostratus ticks was a member of the genus Coxiella . This organism grouped with Coxiella symbionts of other soft tick species (Argasidae), having different isolates of C. burnetii as a sister group, and these 2 groups formed a clade that grouped with another clade containing Coxiella symbionts of hard tick species (Ixodidae). Analysis of tick mitochondrial 16S rRNA gene database composed mostly of tick species previously shown to harbor Coxiella symbionts suggests a phylogenetic congruence of ticks and their Coxiella symbionts. Furthermore, these results suggest a very long period of coevolution between ticks and Coxiella symbionts and indicates that the original infection may have occurred in an ancestor common to the 2 main tick families, Argasidae (soft ticks) and Ixodidae (hard ticks). However, this evolutionary relationship must be confirmed by more extensive testing of additional tick species and expanded populations.