A New Species of Cyclobulura (Nematoda: Subuluridae) from Zaedyus pichiy and Chaetophractus vellerosus (Xenarthra: Dasypodidae) in Argentina

Cyclobulura superinae n. sp. collected from Zaedyus pichiy and Chaetophractus vellerosus is herein described as the second species in Cyclobulura Quentin, 1977, and the first subulurid in armadillos. The species is unique in the spur-like structures present at the tip of both spicules, yet they conform to the description of Cyclobulura in the structure of the buccal parts. Specimens of the new species show longer chordal lobes and more conspicuous radial lobes and are smaller than specimens of C. lainsoni. In addition, males of C. superinae exhibit a spur-like process in the distal end of the spicules and a shorter tail (170 vs. 300 µm) with no spine. Finally, the eggs of C. superinae are smaller (60-89 × 45-71 vs. 95-100 × 80-85). To our knowledge, the new species is the first subulurid nematode found in an armadillo

Contributions in taxonomy, ecology and sanitary importance of ectoparasites of herpetozoans and wild mammals from Argentina and Chile in the last decade

Este trabajo presenta una actualización sobre el estado de las investigaciones en ectoparásitosde mamíferos silvestres y herpetozoos de Argentina y Chile. Principalmente, focalizamos en las líneas de estudiodesarrolladas en la última década, las cuales en muchos casos permitieron el establecimiento de nuevosgrupos de investigación. Esta revisión surge de los resultados del Primer Taller sobre Estudios de Ectoparásitosen Argentina y Chile, en el marco del VIII Congreso Argentino de Parasitología (Corrientes, Abril de 2019).El estado actual de las investigaciones en la región evidencia un amplio conocimiento taxonómico sobre losdiferentes grupos de ectoparásitos y un incremento en el abordaje de estudios ecológicos y/o epidemiológicos.Consideramos que el Estado tuvo un papel clave en la creciente importancia que fue adquiriendo el conocimientocientífico sobre los ectoparásitos de Argentina y Chile. Esto se ve reflejado en la federalización del estudiode los ectoparásitos y en la formación de nuevos especialistas, recursos humanos calificados graduadosen Universidades Públicas Nacionales, apoyados por becas de posgrado, y cuyas investigaciones han sidosubsidiadas por diversos fondos nacionales. Consideramos fundamental generar espacios de discusión yactualización proponiendo la conformación de una red de especialistas en ectoparasitología de la región, paracompartir conocimiento e información y realizar trabajos interdisciplinarios en sinergia.This work provides an update on the status of researches in ectoparasites of herpetozoans and wild mammals from Argentina and Chile. We mainly focus on the new lines of research developed in the last decade, which in many cases allowed the establishment of new research groups. This review arises from the results from the First Workshop on Ectoparasite Studies in Argentina and Chile, during the VIII Argentine Congress of Parasitology (Corrientes, April 2019). The current state of research on ectoparasites in the region shows a broad taxonomic knowledge of the different ectoparasite groups, and a marked tendency to address ecological and/or epidemiological studies. We remarked the key role of a scientific politic in the growing of the knowledge of the ectoparasites from Argentina and Chile. This is particularly reflected in the federalization of the studies and the training of new specialists, qualified people graduated from National Public Universities, supported by postgraduate scholarships, and whose research had been subsidized by various national funds. We considered that is important to be able to generate spaces for discussion and updating; and we propose the creation of a network of ectoparasitology specialists in the region, sharing knowledge and information and performing interdisciplinary work in synergy.Fil: Sánchez, Juliana Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; ArgentinaFil: Leonardi, María Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Debárbora, Valeria Natalia. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; ArgentinaFil: Di Benedetto, Ingrid María Desireé. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; ArgentinaFil: Ezquiaga, María Cecilia. 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: Gozzi, Ana Cecilia. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Universidad Nacional de Luján. Instituto de Ecología y Desarrollo Sustentable; ArgentinaFil: López Berrizbeitia F.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Biodiversidad Neotropical. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto de Biodiversidad Neotropical. Instituto de Biodiversidad Neotropical; ArgentinaFil: Moreno Salas, L. Universidad de Concepción; ChileFil: Silva de la Fuente, M. C.. Universidad de Concepción; Chil

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM