Fluvial and eolian ichnofaunas from the Lower Permian of South America (Patquía Formation, Paganzo Basin)

The Lower Permian Patquía Formation is the youngest unit of the Paganzo Basin, western Argentina. The lower section consists of red mudstones, and fine- and coarse-grained sandstones deposited in fluvial systems with extensive and thick floodplain deposits. These rocks contain a low-diversity and relatively abundant association of trace fossils suggesting the activity of a sub-superficial to superficial fauna. The association is characterized by Rusophycus carbonarius (Cubichnia), Cruziana problematica (Repichnia), and Palaeophycus tubularis (Domichnia) of the Scoyenia ichnofacies. Disarticulated fish remains are also present. The upper section is dominated by red, cross-bedded, medium- to fine-grained sandstones deposited in eolian systems that host a lowdiversity and low-abundance association of trace fossils that indicates the activity of a mainly superficial fauna. Tetrapod footprints (Chelichnus duncani, oval digit imprints, short parallel grooves, and sinusoidal grooves), horizontal to vertical burrows (Palaeophycus tubularis and Skolithos isp. respectively), and arthropod trackways are the typical components of these deposits. The association shows elements of the three presently proposed eolian ichnofacies (Chelichnus, Octopodichnus and Entradichnus ichnofacies) suggesting the necessity of revision and the possible integration of these separate ichnofacies into a single model. The record of fossil vertebrate tracks is uncommon in Lower Permian strata of South America. Therefore, the ichnologic record of the Patquía Formation is a significant contribution to the understanding of Lower Permian South American ichnofaunas

Erioneuron pilosum (Buckley) Nash var. longiaristatum (Kurtz) Anton

Lihuel Calel, en cerrospublishedVersio

Jarava frigida (Phil.) F. Rojas var. parvispicula (Parodi) Peñailillo

Paso de Pircas NegraspublishedVersio

Solanum pilcomayense Morong

PalermopublishedVersio

Games and sports of the guaranis of Misiones province, Argentina : ethnobotanical complementary notes

Fil: Keller, Héctor A. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: Keller, Héctor A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.Fil: Krapovickas, Antonio. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Sobre la base de un estudio etnobotánico llevado a cabo en la última década en comunidades guaraníes de la provincia de Misiones, Argentina, se presenta información sobre plantas vinculadas al contexto de las actividades lúdicas que se llevan a cabo en las comunidades visitadas. Esta información es complementaria a un estudio publicado hace más de cuarenta años por Martínez Crovetto.Be mean an ethnobotanical study carried out in the last decade in guarani communities of the Misiones Province, Argentina; information about plants related to the context of game activities carried out in the communities visited, is give here. This information is complementary to a study published by Martinez Crovetto forty years ago

Potentilla tucumanensis A. Castagnaro & M. Arias

Puerta de Velez, ± 15 km al Oeste de Pilar, orillas del Río SegundopublishedVersio

Oenothera indecora Cambess.

AscasubiAriza Espinar. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentin

Algunos tipos de Malváceas descriptos por C. B.Presl

La oportunidad de examinar ciertos tipos de nombres publicados por C.B. Presl en el género Malva, ha llevado a una comprensión más clara de cuatro especies y la necesidad de hacer una nueva combinación: Urocarpidium echinatum (C. Presl) Krapov. & Fryxell

Monteiroa hatschbachii Krapov.

Cantagalo, PR-170, 13 km S de Biturana.publishedVersio

Monteiroa reitzii Krapov.

9 km E de Bom Jardim da Serra.publishedVersio