Ectoparasite occurrence associated with males and females of wild rodents Oligoryzomys flavescens (Waterhouse) and Akodon azarae (Fischer) (Rodentia: Cricetidae: Sigmodontinae) in the Punta Lara Wetlands, Argentina

The objective of this research was to study infestation parameters and indexes of ectoparasites associated with each sex of the wild rodents Oligoryzomys flavescens (Waterhouse) and Akodon azarae (Fischer) in the Punta Lara wetlands, Argentina. A trend towards higher mean abundance (MA) and ectoparasite specific richness was observed in males of O. flavescens whereas those values were similar for both A. azarae sexes. The prevalence of the following ectoparasites was significantly higher on males (P < 0.05): Mysolaelaps microspinosus Fonseca (65.2%) and Hoplopleura travassosi Werneck (73.9%) on O. flavescens, and Ixodes loricatus Neumann (71.4%) on A. azarae. Only H. travassosi mean abundance was significantly higher on males (MA = 44.1). Since I. loricatus and Hoplopleura spp. are involved in the transmission of pathogens that cause diseases in animals and humans, and whose reservoirs are rodent hosts, these results are epidemiologically important.Facultad de Ciencias Naturales y Muse

Nuevos registros de pulgas (Siphonaptera: Ctenophthalmidae: Rhopalopsyllidae y Stephanocircidae) de la Patagonia argentina, con comentarios sobre la morfología de Agastopsylla boxi y Tiarapsylla argentin

Para la Patagonia se ha mencionado una gran diversidad de pulgas parásitas de roedores sigmodontinos. Varias de estas pulgas se han descrito con localidad tipo en la región, incluyendo varios taxones endémicos. Sin embargo, para muchas especies las descripciones originales son breves y no existen nuevos aportes morfológicos. En el presente estudio se registran 8 especies de pulgas (Ctenophthalmidae, Rhopalopsyllidae y Stephanocircidae) parasitando roedores sigmodontinos de la Patagonia argentina. Se reportan 19 asociaciones parásito-huésped nuevas, además, todas las pulgas estudiadas extienden su distribución geográfica conocida. Entre ellas, Tiarapsylla argentina se menciona por primera vez para la Patagonia; Craneopsylla minerva, Sphinctopsylla ares, Polygenis (P.) rimatus y Polygenis (P.) platensis se registran por primera vez para la provincia del Chubut y Agastopsylla boxi, Ectinorus (E.) ixanus y Ectinorus (E.) hapalus para la provincia de Santa Cruz, ampliando el límite sur de su distribución geográfica conocida. Además, se describe la morfología del aedeagus de A. boxi y T. argentina, desconocida hasta el momento. Estos resultados amplían la información morfológica de las pulgas y contribuyen al conocimiento de la biodiversidad patagónica.A high diversity of fleas parasitizing sigmodontine rodents has been mentioned for Patagonia. Several of these fleas have been described having their type localities in the region, including several endemic taxa. For many species and subspecies, however, the original descriptions are brief and there are no new morphological contributions. In the present study we report 8 species of fleas (Ctenophthalmidae, Rhopalopsyllidae and Stephanocircidae) parasitizing sigmodontine rodents from Argentinean Patagonia. Nineteen new parasite?host associations are reported and all studied fleas extend their known geographic range. Among them, Tiarapsylla argentina is mentioned for the first time for Patagonia; Craneopsylla minerva, Sphinctopsylla ares, Polygenis (P.) platensis and Polygenis (P.) rimatus are registered for the first time in Chubut and Agastopsylla boxi, Ectinorus (E.) ixanus and Ectinorus (E.) hapalus in Santa Cruz, expanding the southernmost limit of their geographical distribution. Also, for A. boxi and T. argentina we describe the morphology of the aedeagus, so far unknown. Results extend the morphological information of fleas and contribute to the knowledge of Patagonian biodiversityFil: Sanchez, Juliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); Argentina. Universidad Nacional de La Plata; ArgentinaFil: Lareschi, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); Argentina. Universidad Nacional de La Plata; Argentin

Ectoparasite occurrence associated with males and females of wild rodents Oligoryzomys flavescens (Waterhouse) and Akodon azarae (Fischer) (Rodentia: Cricetidae: Sigmodontinae) in the Punta Lara Wetlands, Argentina

The objective of this research was to study infestation parameters and indexes of ectoparasites associated with each sex of the wild rodents Oligoryzomys flavescens (Waterhouse) and Akodon azarae (Fischer) in the Punta Lara wetlands, Argentina. A trend towards higher mean abundance (MA) and ectoparasite specific richness was observed in males of O. flavescens whereas those values were similar for both A. azarae sexes. The prevalence of the following ectoparasites was significantly higher on males (P < 0.05): Mysolaelaps microspinosus Fonseca (65.2%) and Hoplopleura travassosi Werneck (73.9%) on O. flavescens, and Ixodes loricatus Neumann (71.4%) on A. azarae. Only H. travassosi mean abundance was significantly higher on males (MA = 44.1). Since I. loricatus and Hoplopleura spp. are involved in the transmission of pathogens that cause diseases in animals and humans, and whose reservoirs are rodent hosts, these results are epidemiologically important.Facultad de Ciencias Naturales y Muse

Nuevos registros de pulgas (Siphonaptera: Ctenophthalmidae: Rhopalopsyllidae y Stephanocircidae) de la Patagonia argentina, con comentarios sobre la morfología de Agastopsylla boxi y Tiarapsylla argentina

A high diversity of fleas parasitizing sigmodontine rodents has been mentioned for Patagonia. Several of these fleas have been described having their type localities in the region, including several endemic taxa. For many species, however, the original descriptions are brief and there are no new morphological contributions. In the present study we report 8 species of fleas (Ctenophthalmidae, Rhopalopsyllidae and Stephanocircidae) parasitizing sigmodontine rodents from Argentinean Patagonia. Nineteen new parasitehost associations are reported and all studied fleas extend their known geographic range. Among them, Tiarapsylla argentina is mentioned for the first time for Patagonia; Craneopsylla minerva, Sphinctopsylla ares, Polygenis (P.) platensis and Polygenis (P.) rimatus are registered for the first time for Chubut, and Agastopsylla boxi, Ectinorus (E.) ixanus and Ectinorus (E.) hapalus for Santa Cruz, extending the southernmost limit of their geographical distribution. Also, for A. boxi and T. argentina we describe the morphology of the aedeagus, so far unknown. Results extend the morphological information of fleas and contribute to the knowledge of Patagonian biodiversity.Para la Patagonia se ha mencionado una gran diversidad de pulgas parásitas de roedores sigmodontinos. Varias de estas pulgas se han descrito con localidad tipo en la región, incluyendo varios taxones endémicos. Sin embargo, para muchas especies las descripciones originales son breves y no existen nuevos aportes morfológicos. En el presente estudio se registran 8 especies de pulgas (Ctenophthalmidae, Rhopalopsyllidae y Stephanocircidae) parasitando roedores sigmodontinos de la Patagonia argentina. Se reportan 19 asociaciones parásito-huésped nuevas, además, todas las pulgas estudiadas extienden su distribución geográfica conocida. Entre ellas, Tiarapsylla argentina se menciona por primera vez para la Patagonia; Craneopsylla minerva, Sphinctopsylla ares, Polygenis (P.) rimatus y Polygenis (P.) platensis se registran por primera vez para la provincia del Chubut y Agastopsylla boxi, Ectinorus (E.) ixanus y Ectinorus (E.) hapalus para la provincia de Santa Cruz, ampliando el límite sur de su distribución geográfica conocida. Además, se describe la morfología del aedeagus de A. boxi y T. argentina, desconocida hasta el momento. Estos resultados amplían la información morfológica de las pulgas y contribuyen al conocimiento de la biodiversidad patagónica.Centro de Estudios Parasitológicos y de Vectore

Novos dados relativos à morfologia de Polygenis (Polygenis) rimatus (Jordan) (Siphonaptera: Rhopalopsyllidae)

The study was carried out on the basis of 208 specimens of both sexes from a wide geographical range, from central Brazil to central Argentina. The morphology of diagnostic features of Polygenis (Polygenis) rimatus (Jordan) including the presence or absence of the ductus of the spermatheca with a thick wall, the shape of the posterior margin of seventh sternum in females, and the size of the angle between the distal and the proximal arms of the basal part of the aedeagal tubus, and the number of convolutions made by the coil of the aedeagal tubus interior in males, have been studied. The results obtained are important in clarifying some difficulty in species recognition. Besides, the variability of some characteristics between specimens from disjoint localities in Brazil and Argentina is also noticed.O estudo baseou-se em 208 espécimes, coletados em urna ampia faixa geográfica situada entre os centros do Brasil e da Argentina. Morfológicamente, as características utilizadas para a idcntificacáo de Polygenis (Polygenis) rimatus (Jordan) foram estudadas. tais como a presenta ou ausencia do duto da espennateca com margens espessadas e a forma da margena posterior do estemito VII, entre asfémeas, bem como o ángulo entre os bracos proximal e distal do tubo interno do aedeagus e o número de suas circunvolucocs. nos exemplares machos. Os resultados obtidos sao importantes para subsidiärem o reconhecimento da espécie. A variabilidade de algumas características entre exemplares de localidades disjuntas no Brasil e Argentina é também noticiada.Centro de Estudios Parasitológicos y de Vectore

Artrópodos ectoparásitos

Fil: Lareschi, Marcela. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentin

Two new species of Neotyphloceras (Siphonaptera: Ctenophthalmidae) from Argentinean Patagonia

Two new species of Neotyphloceras Rothschild, parasites of sigmodontine rodents from Argentinean Patagonia, are described and illustrated: N. crackensis n. sp. and N. pardinasi n. sp. These species are compared with their morphologically closest relatives. Males are characterized by the shape of the upper lobe of the fixed process of clasper; the shape and chaetotaxy of the distal arm of sternum IX and by the shape of the crochet of the aedeagus; females by the contour of the distal margin of sternum VII. Neotyphloceras pardinasi n. sp. is reported from western Chubut Province, while N. crackensis n. sp. is known from the eastern regions of Chubut and Santa Cruz Provinces. With these reports, the geographical distribution of Neotyphloceras is extended to eastern Patagonia. A key to the species and subspecies of Neotyphloceras is provided.Fil: Sánchez, Juliana Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); ArgentinaFil: Lareschi, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); Argentin

New species and records of the mite genus Prolistrophorus (Acariformes: Listrophoridae) from rodents of the subfamily Sigmodontinae (Rodentia: Cricetidae)

Six fur-mite species of the genus Prolistrophorus Fain, 1970 (Acariformes: Listrophoridae) were recorded from Central and South American rodents of the subfamily Sigmodontinae (Rodentia: Cricetidae). Among them, Prolistrophorus (Aprolistrophorus) parabidentatus sp. nov. from Akodon azarae from Argentina and Prolistrophorus (Aprolistrophorus) tylomys sp. nov. from Tylomys nudicaudus from Guatemala are described as new for science. New hosts are recorded for the following species: Prolistrophorus (Prolistrophorus) grassii (Radford, 1954) from Zygodontomys brevicauda from Colombia, P. (P.) frontalis (Hirst, 1921) from Oligoryzomys sp. from Argentina, P. (P.) argentinus (Hirst, 1921) from Melanomys caliginosus, Akodon affinis from Colombia and Scapteromys aquaticus from Argentina, Prolistrophorus (Beprolistrophorus) hirstianus Fain, 1973 from Scapteromys aquaticus from Argentina.Fil: Bochkov, Andre. Universitetskaya embankment. Zoological Institute; Rusia. University Of Michigan; Estados UnidosFil: Lareschi, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Estudios Parasitológicos y de Vectores (i); Argentina. Universidad Nacional de La Plata; ArgentinaFil: Barreto, Mauricio. Universidad del Valle. Departamento de Microbiología; Colombi

Ectoparasites associated with sigmodontine rodents from northeastern Argentina

Por lo general, los roedores sigmodontinos (Cricetidae) están asociados con una variedad de ectoparásitos. Sin embargo, los estudios en el noreste argentino son escasos. Aquí analizamos las comunidades componentes de ectoparásitos asociados con sigmodontinos en el sur de la Provincia de Misiones. En total, se recolectaron 835 ectoparásitos de los 97 roedores examinados: 782 ácaros (Acari, Mesostigmata; S = 7; P = 78.35 %; MA = 8.06), 50 pulgas (Hexapoda, Siphonaptera; S = 2; P = 21.65 %; MA = 0.53), y dos garrapatas (Acari, Ixodida; S = 1; P = 2.06 %; MA = 0.02, P < 0.005). Las cinco especies siguientes se mencionan por primera vez para el noreste: Androlaelaps rotundus, Gigantolaelaps wolffsohni, Laelaps manguinhosi, L. paulistanensis y Polygenis (P.) tripus, y aumentan el conocimiento sobre la biodiversidad del área. Se observó una tendencia hacia la agregación para la mayoría de los ectoparásitos. De las 10 especies de ectoparásitos identificadas en el presente estudio, cinco se recolectaron de una especie hospedadora única, por lo que la riqueza específica varió entre tres y cuatro en cada comunidad componente. Dado que algunos de los ectoparásitos identificados pueden jugar un rol en la transmisión de patógenos, los resultados obtenidos contribuyen a una mejor comprensión de la relación ectoparásito-hospedador, que puede tener implicaciones epidemiológicas.Usually sigmodontine rodents (Cricetidae) are associated with a variety of ectoparasites. However, the studies in northeastern Argentina are scarce. Herein we analyze the ectoparasite component communities associated with four species of sigmodontines in the south of the Province of Misiones. In total, 835 ectoparasites were collected from the 97 rodents examined: 782 mites (Acari, Mesostigmata; S = 7; P = 78.35 %; MA = 8.06), 50 fleas (Hexapoda, Siphonaptera; S = 2; P = 21.65 %; MA = 0.53), and two ticks (Acari, Ixodida; S = 1; P = 2.06 %; MA = 0.02, P < 0.005). The following five species are mentioned for the first time for the northeastern: Androlaelaps rotundus, Gigantolaelaps wolffsohni, Laelaps manguinhosi, L. paulistanensis, and Polygenis (P.) tripus, increasing the biodiversity known for the area. A tendency toward host aggregation was observed for most of the ectoparasites. Out of 10 ectoparasite species identified in the present study, five were collected from a unique host species, and so, species richness varied between three and four in every component community. Since some of the ectoparasites identified may play a role as vectors of pathogens, the obtained results contribute to a better understanding of the ectoparasite-host relationship, which may have epidemiological implications.Fil: Lareschi, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Savchenko, Ekaterina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Urdapilleta, Mara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentin

Flea parasites of small mammals in the Monte Desert biome in Argentina with new host and locality records

Fleas associated with small mammals from the Argentinean Monte Desert, were examined. The research was carried out in Ñacuñán Biosphere Reserve (34°02´S, 67°58´W), in the Chaqueña Biogeographic Subregion of the Neotropical Region. Mammal species trapped were as follows: Rodentia, Muridae, Sigmodontinae: Akodon molinae Contreras, 1968 (N = 44), Graomys griseoflavus (Waterhouse, 1837) (N = 15), Calomys musculinus (Thomas, 1913) (N = 12), and Eligmodontia typus F. Cuvier, 1837 (N = 7); Didelphiomorphia, Didelphidae, Mamorsinae: Thylamys pusillus (Desmarest, 1804) (N = 1). A total of 236 fleas were collected: Stephanocircidae, Craneopsyllinae: Craneopsylla minerva wolffhuegeli (Rothschild, 1909); Rhopalopsyllidae, Rhopalopsyllinae: Polygenis (Polygenis) bohlsi bohlsi (Wagner, 1901), Polygenis (Polygenis) platensis cisandinus (Jordan, 1939) and Polygenis (Neopolygenis) puelche Del Ponte, 1963; Rhopalopsyllidae, Parapsyllinae: Ectinorus (Ectinorus) barrerai Jordan, 1939. High values of total mean abundance (MA = 2.99) and total prevalence (P = 73.41%) were obtained. A. molinae (MA = 3.14; P = 93.18; flea specific richness S = 5; Shannon specific diversity index H = 1.25) and G. griseoflavus (MA = 6.40; P = 100%; S = 5; H = 0.76) showed the highest values of the infestation parameters. No fleas were collected from E. typus, possibly because of its habits. Fleas associated with T. pusillus are reported for the first time. Our collections extend the western limits of the distribution of both P. (N.) puelche and P. (P.) b. bohlsi. In addition, new host species are reported for every flea species and subspecies, and seven host-flea associations are mentioned for the first time.Fil: Lareschi, Marcela. Universidade Federal de Minas Gerais; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Ojeda, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Linardi, Pedro M.. Conselho Nacional de Desenvolvimiento Científico e Tecnológico; Brasi