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New insights into the early diversification of the Ostracoda: Tremadocian ostracods from the Cordillera Oriental, Argentina

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Salas M. J., Vaccari N. E.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 1

New species of ostracods from the Tremadocian in the northwest region of Argentina are described. These are among the earliest well−documented records of ostracods, which shed new light onto the early diversification of the group. The described fauna consists of seven species, five of which are new: Saltite uchuy sp. nov., Saltite kuraq sp. nov., Conchoprimitia? iglesiasi sp. nov., Orechina violetae sp. nov., and Orechina catalinae sp. nov. The fauna consists primarily of soanellids, a non−dimorphic family of palaeocopids, and of binodicopids. One factor leading to diversification of the group in this region may have been the complex configuration of the northwest basin, which had a restricted pattern of circulation. The distribution of the first ostracods is largely restricted to Gondwana and peri−Gondwana regions. Accordingly, it is possible to envision that the origin or at least an important radiation of the group was centred in this region. Both the Soanellidae and the genus Orechina would have originated in Gondwana and would have become widespread later during the Middle Ordovician. The Tremadocian fauna located in Argentina show significant affinities with fauna located in the warm−water setting of the east Gondwana, mainly in Australia and China.

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First report of Schulzia travassosi (Nematoda, Trichostrongylina, Molineoidea) for amphibians of the Chaco region in Argentina and proposal of Oswaldocruzia melanostictusi nov. comb.

100%

Gonzalez C. E., Hamann M. I.

Acta Parasitologica

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2015

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tom 60

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nr 4

3

Digenean parasites of Sigmodontinae rodents from Argentina: a list of species, new host, and geographical records

100%

Guerreiro Maryins N. B., del Rosario Robles M., Diaz J. I., Panisse G., Navone G. T.

Acta Parasitologica

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2020

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tom 65

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nr 1

4

Ovine abortion by Neospora caninum: first case reported in Argentina

100%

Hecker Y. P., Morrell E. L., Fiorentino M. A., Gual I., Rivera E., Fiorani F., Dorsch M. A., Gos M. L., Pardini L. L., Scioli M. V., Magarinos S., Paolicchi F. A., Canton G. J., Moore D. P.

Acta Parasitologica

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2019

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tom 64

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nr 4

5

Nematode parasites of the Chilean Flamingo, Phoenicopterus chilensis (Phoenicopteridae) from Central Argentina, with a description of a new species of Tetrameres (Tetrameridae)

100%

Nunez V., Drago F. B., Digiani M. C., Lunaschi L. I.

Acta Parasitologica

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2017

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tom 62

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nr 2

6

First record of Toxoplasma gondii in Chaetophractus villosus in Argentina

100%

Kin M. S., Fort M., Gimenez H. D., Casanave E. B.

Acta Parasitologica

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2015

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tom 60

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nr 1

7

Co-occurrence of lemnids in Argentina: a null model analysis

100%

Wolek J., Walanus A.

Fragmenta Floristica et Geobotanica

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2000

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tom 45

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nr 1-2

8

Factors affecting home range size and overlap in Akodon azarae [Muridae: Sigmodontinae] in natural pasture of Argentina

100%

Priotto J. W., Steinmann A. R.

Acta Theriologica

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1999

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tom 44

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nr 1

Differences in home range size in relation to sex, age, breeding and non-breeding periods were studied Home range size and overlap were examined at different densities values in populations of Akodon azarae (Fischer, 1829) on railway banks in southern Cordoba Province (Argentina). The sampling was carried out between October 1994, and February 1997, using the capture-mark-recapture method. Home range size in A, azarae was determined by sex and breeding period, and it was independent of the observed density values. Home range size of males was always larger than that of femaies. Increase of population density during the breeding period affected the degree of intersexual overlap of home range,

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Habitat use by coypu Myocastor coypus in agro-systems of the Argentinean pampas

100%

D'Adamo P., Guichon M. L., Bo R. F., Cassini M. H.

Acta Theriologica

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2000

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tom 45

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nr 1

Habitat use by coypu Myocastor coypus (Molina, 1782) was studied in agro-systems oí' the Pampas grasslands, Argentina. We analysed two dimensions of the habitat: perpendicular and parallel to the water source. The perpendicular dimension covered three distinct areas: border of the stream, interface, and crops, while the parallel dimension involved the use of different crop types. We worked at two study sites, Mechongué (winter 1995 - summer 1996) and Lujan (winter 1997). At Mechongué, we conducted Four seasonal samples using an indirect method of counting faeces to estimate abundance of coypu. Along the perpendicular dimension, coypus used the border significantly more than the interface and the crops. The relative use of the border increased over the study period. Parallel to the water source, crops were avoided and pastures were preferred, At the Lujan study site, we observed the behaviour of coypu by recording activity and use of cover types at different distances from the stream. Coypu spent most of their active time foraging (80.5%). Ninety-two percent of the bouts took place less than 4 m from the pond. Coypus did not move more than 10 m away from the pond and did not use the crops. These results disagree with the claim that coypus are a risk to croplands in their native range.

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Cytogenetic and nucleolar meiotic cycle analyses in Dysdercus imitator Blote, 1931 [Pyrrhocoridae, Heteroptera] from Argentina

100%

Bressa M. J., Papeschi A. G., Fumagalli E., Van Doesburg P. H., Larramendy M. L.

Folia Biologica

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2003

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tom 51

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nr 3-4

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Bird community of inner La Plata City, Argentina

100%

Montalti D., Kopij G.

Acta Ornithologica

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2001

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tom 36

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nr 2

During the years 1991-2000,101 bird species were recorded in the city of La Plata, Argentina, 47 of which were breeding ones. The most abundant species were: Zenaida auriculata, Columba livia, Funarius rufus, Pitangus sul- phuratus, Zonotrichia capensis and Passer domesticus. Columba maculosa, C. picazuro, Fumarius rufus, Turdus rufiventris and Molothrus bonariensis have increased in number, while Passer domesticus has decreased. Zonotrichia capensis may successfully compete for food with Passer domesticus. Sturnus vulgaris and Acridotheres cristatellus are new species in the breeding avifauna of La Plata city.

12

Winter circadian activity pattern of free-ranging coypus in the Parana River Delta, eastern Argentina

100%

Palomares F., Bo R., Beltran J. F., Villafane G., Moreno S.

Acta Theriologica

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1994

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tom 39

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nr 1

During August 1990, 3 male and 3 female coypus Myocastor coypus (Molina, 1782) were radiotracked for 42 24-h periods at the Delta of Paraná River, Argentina. Coypus were mainly nocturnal, with activity peaks around one hour after sunset and two hours before sunrise. Movement rate peaked between 02.00 and 04.00 o'clock. This pattern is similar to that observed in captive individuals and introduced feral populations. Among 7 environmental factors (day period, temperature, wind, cloud cover, and presence or absence of moon, fog, and rain) only period of day and rainfall during daylight were found significantly related to coypu activity, but no environmental factor influenced coypu nocturnal rate of movement.

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Detection of Dirofilaria immitis in mid-Western arid Argentina

84%

Cuervo P. F., Sierra M. R., Waisman V., Gerbeno L., Sidoti L., Albonico F., Mariconti M., Mortarino M., Pepe P., Crigoli G., Genchi C., Rinaldi L.

Acta Parasitologica

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2013

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tom 58

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nr 4

Dirofilariosis, caused by Dirofilaria immitis and D. repens, is (re-) emerging worldwide. Dogs are the main reservoirs, while human infection has recently become an important focus of interest and attention. In Argentina, canine D. immitis infection has been described in eastern and northern subtropical and temperate humid regions, but never reported in mid-western arid regions so far. In this research note we report for the first time the occurrence of autochthonous human and canine D. immitis infection in the region.

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The influence of disturbance type on precipitation − use efficiency at functional group and species scales in an arid habitat

84%

Busso C. A., Montenegro O. A., Torres Y. A., Giorgetti H. D., Rodriguez G. D.

Polish Journal of Ecology

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2016

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tom 64

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nr 2

We used long-term datasets (1984–1992) to contrast precipitation-use efficiency estimates between various disturbance kinds at a functional group and/or a species scale. Effects of varying amounts of precipitation and plant cover on PUE were also examined. Field studies were conducted at northeastern, arid Patagonia, Argentina (40°39′49″S, 62°53′6.4″W). Within each management kind, biomass was sampled in 0.5 × 0.5m permanent plots (n = 30) over 9 years after defoliation at 5 cm stubble at the end of each growing season, and it was separated into species. Biomass sampling allowed determination of annual net primary production. Thereafter, species were grouped into each of three functional groups. Precipitation-use efficiency (PUE) was calculated as the total dry matter produced per unit surface area on any given year divided by the total rainfall in that year. Plant cover on 20 out of those 30 plots was determined to study the relationship between plant cover and PUE. The contribution of cool-season perennial grasses to total PUE was higher (P <0.05) than that found for the other two functional groups in all management kinds and years. PUE was similar (P> 0.05) in wet than dry years, and it was greater (P <0.05) or similar (P> 0.05), but not lower, on the more than less competitive perennial grass species in all management kinds. The relationship between plant cover and PUE was positive, linear (P <0.0000) and management-kind dependent.

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Seroepidemiological study of Neospora caninum in beef and dairy cattle in La Pampa, Argentina

84%

Fort M., Edelsten M., Maley S., Innes E.

Acta Parasitologica

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2015

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tom 60

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nr 2

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Larval morphology and chaetotaxy of Philonthus Stephens (Coleoptera: Staphylinidae: Staphylininae) based on descriptions of eight species from Argentina

84%

Chani-Posse M. R.

Annales Zoologici

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2006

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tom 56

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nr 1

The third instar larva of eight Philonthus species from Argentina, P. flavolimbatus Erichson, P. pauxillus Solsky, P. bicoloristylus Chani-Posse, P. sericans (Gravenhorst), P. bonariensis Bernhauer, P. longicornis Stephens, P. rectangulus Sharp and P. quadraticeps Boheman, are described (five for the first time), keyed and illustrated. Measurements of all larval instars and differences in chaetotaxic and non-chaetotaxic characters between first and third instar are given in tables and illustrated. A generic description based on literature is also included. Chaetotaxy descriptions for Philonthus species are elaborated based on Ashe and Watrous's system for setal patterns. Characters of systematic value at generic and specific levels are highlighted and discussed.

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Evaluation of frequency of antibodies against Toxoplasma gondii, Neospora caninum and Sarcocystis spp. and transmission routes in sheep from Humid Pampa, Argentina

84%

Hecker Y. P., Masson F. M., Armendano J. I., Cora J., Olivares C. F., Gual I., Pardini L., Moore D. P., More G., Canton G. J.

Acta Parasitologica

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2018

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tom 63

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nr 2

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Morphological and molecular characterization of entomophthorales (Entomophthoromycota: Entomophthoromycotina) from Argentina

84%

Manfrino R. G., Castrillo L. A., Lopez Lastra C. C., Toledo A. V., Ferrari W., Jansen A. B.

Acta Mycologica

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2020

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tom 55

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nr 2

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In vitro susceptibility to metronidazole of Tritrichomonas foetus bovine isolates from Argentina

84%

Rivero M. B., Luque M. E., Abdala M. E., Luna B. E., Di Lullo D., Echaide I. E., Carranza P. B., Rivero F. D.

Acta Parasitologica

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2019

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tom 64

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nr 2

20

Masisa produkuje swoja pierwsza argentynska plyte MDF

84%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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1996

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tom 37

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nr 2

153

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