Based on a variety of evidence (photographs, feces, specimens), three previously unsuspected caviomorph rodents are reported from Argentina: (1) a spiny rat (Echimyidae) probably belonging to the genus Phyllomys, in northern Misiones Province near Iguazú National Park; (2) an undetermined octodontid (Octodontidae) in western Chacoan Córdoba Province; and (3) the octodontid Spalacopus (Octodontidae), in high-Andean ranges of San Juan Province. The latter constitutes the first record of the genus for Argentina, and all the three findings highlight the necessity to increase collecting efforts in the country.
Macrosistema Iberá. El objetivo fue evaluar el efecto nodriza de los arbustos y los parámetros estructurales de la regeneración. Se demostró que la presencia de arbustos aislados es determinante en el establecimiento de regeneración y que Ilex dumosa var. guaranina, Ocotea lancifolia y Miconia chamissois promovieron significativamente la abundancia y riqueza de los mismos. La regeneración estuvo compuesta por 21 especies pero principalmente estructurada por Miconia chamissois, Ilex dumosa var. guaranina, Citronella gongonha y Myrsine parvula. Los resultados indican además que Ilex dumosa var. guaranina fue la especie solitaria más abundante, y una de las que mejor regeneran en estas condiciones. Considerando que estos arbustos pueden llegar a constituir el estado inicial en la formación de fragmentos de selva más o menos grandes, se sugiere que el atributo de abundancia de esta especie en este tipo de sucesión leñosa primaria guarda relación con la expresión “ka’a mirĩ” (la selva incipiente), un nombre guaraní de Ilex dumosa var. guaranina.
En este trabajo Allamanda schottii Pohl (Apocynaceae) es documentada como nueva cita genérica y específica para la Flora Argentina. La especie fue hallada en la ribera del Paraná, en el norte de la provincia de Corrientes, Argentina. Se incluye su sinonimia, descripción, comentarios sobre su distribución, hábitat, fenología, biología reproductiva, nombres vulgares, usos y observaciones.
We present the first record of Fluvicola nengeta for the Argentinian Republic (Misiones province), and a brief story of the recent spread of its geographical distribution.
Keywords: masked water-tyrant, Tyrannidae, Fluvicolinae, Atlantic Forest, Misiones, Argentina
Melanophryniscus devincenzii is known from Misiones (Argentina), Rio Grande do Sul (Brazil), Guairá (Paraguay) and northern Uruguay. Herein, we report the first record for Corrientes Province in Argentina.
Cyathea atrovirens (Cyatheaceae) is the southernmost tree-fern of Argentina and its presence in the Corrientes province was in doubt after the height of the Yacyretá dam was raised. However, new records confirm the presence of the species in the province and increase the range distribution southward. Comments on the distribution and ecology of the species are now reported.
A taxonomical rearrangement of "Aemilia" pagana species-group is proposed: Leucanopsis pagana (Schaus in Proc Zool Soc London 1894:225-243, 1894) comb. nov. and L. ninae (Orfila in Rev Soc Entomol Argent 21:67-70, 1959) comb. nov. A new endemic species from Pampa de Achala, Córdoba, Argentina, closer to both species, is described: Leucanopsis navarroi sp. nov. These three species can be recognized because the color pattern is the darkest among species of Leucanopsis. Characteristics of male genitalia suggest the nomenclatural rearrangement proposed. Leucanopsis pagana comb. nov. has a wide distribution from the center of Brazil to northeastern Argentina, including southern Paraguay. The known distribution and geospatial analysis suggest that this species is not in danger. Leucanopsis ninae comb. nov. is restricted to only one known locality (Villa Gesell, Buenos Aires). The restricted known distribution, the different land use practices, and geospatial analysis suggest that this species could be endangered. Leucanopsis navarroi sp. nov. is endemic to the high plateau present in the center of Argentina called Pampa de Achala. The known distribution and geospatial analysis suggest that this species could be endangered. Further studies are necessary to determine effectively the conservation status of these three species.
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