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The South American Ctenomys is the most speciose genus among both hystricomorphs and subterranean rodents of the world. Here, we present the most exhaustive phylogenies and timetree of living and extinct Ctenomys attempt...

The fossil record of New World vultures (Cathartidae) and hawks (Accipitridae) in South America is extensive but still remains patchy, with relatively few records coming from northern South America. The aim of the presen...

A new specimen that is represented by an almost complete and perfectly preserved plastron is described herein from the Late Pleistocene of Entre Rios Province, Argentina. The specimen represents the first fossil of the l...

This paper presents and discusses the analysis of the lithic assemblage from a newly discovered archaeological site, Cueva Alí Mustafá, located in the eastern sector of the Tandilia Range (Buenos Aires, Argentina). Lit...

Recent studies have described widespread statigraphic units of Late Pleistocene and Holocene age in the western part of the Amazon Basin. The recognition of deltaic sedimentation in the uppermost these units near Rio Bra...

The Pampas of South America represents one of the most extended subtropical–temperate grasslands in the world. This ecoregion was influenced by Pleistocene climate oscillations. The sigmodontine rodent assemblage inhab...

Holoplanktonic gastropods (pteropods and heteropods) are major components of modern Indo–West Pacific (IWP) plankton, yet their fossil record in this region remains sparse. Expanding the spatial and temporal coverage o...

Sloths and ground sloths (Xenarthra: Tardigrada) are among the most conspicuous mammals in the Cenozoic faunas of South America. During the late Pleistocene and the early Holocene, all the megafaunal xenarthrans became e...

We report the first results of a shooting experiment performed with lithic point replicas of Fishtailpoints hafted as darts pursuing the aim to estimate the points’ use-lives and related size changesusing survival and ...

Relative changes in geomagnetic field intensity over the last 16,000 years BP were recovered from the study of four cores obtained from Lake Escondido (South Argentina). Rock magnetic analysis shows that the main magneti...

In this paper the potencial importance of the río Negro valley on the peopling of Patagonia is discussed. Flowing along the Pampean-Patagonian border, the Río Negro drains Andean meltwaters across the Southern Cone ...

In this article, we report the first finding and description of an unborn specimen of Cingulata Glyptodontidae. This specimen was found inside a well-preserved dorsal carapace assignable to Glyptodon cf. G. elongatus, pa...

Varied approaches (palaeobiodiversity, palaeobiogeography, bioerosion, geochemistry) to unique Patagonian late Quaternary molluscan assemblages in the southwestern Atlantic, with ages especially from interglacial Marine ...

The record of the genus Tapirus in South America is associated with the faunistic events of the Great American Biotic Interchange (GABI). The taxon is considered an immigrant of Holarctic origin. Although remains are sca...

Las glaciaciones cuaternarias han dejado registro en diversos espacios geográficos de la corteza terrestre. Esto no ha sido una excepción en los Andes Centrales de Argentina y Chile, donde enormes valles labrados por l...

This article describes the first fossils recorded in the Hernandarias Formation (Pleistocene) in Entre Ríos province (eastern Argentina). They are represented by three teeth assigned to the caviomorph rodents (Rodentia,...

The Roca San Miguel (RSM) archaeological site was occupied during Mousterian times. Here we present a geoarchaeological and paleoenvironmental reconstruction of the site. Five stratigraphic units (A to E) formed by diffe...

Abstract Morphological variation in Mouriri guianensis is described and analyzed throughout its range in Brazil and adjacent regions. Features that vary are ovary size, locule and ovule number, shape and smoothness of th...

Carex subgenus Psyllophorae is an engaging study group due to its early diversification compared to most Carex lineages, and its remarkable disjunct distribution in four continents corresponding to three independent sect...

Paleosols formed by the burial of topsoil during landscape evolution can sequester substantial amounts of soil organic carbon (SOC) over millennia due to protection from surface disturbances. We investigated the moisture...

ABSTRACT Amazonia (defined herein as the Amazon basin) is home to the greatest concentration of biodiversity on Earth, providing unique genetic resources and ecological functions that contribute to ecosystem services glo...

Fluvial basins located on the NE side of the Sierra de Aconquija and facing the Tafí valley (NW Argentina) enable a study of the sedimentary records of valleys and alluvial fans that have been subject to glacial and per...

Los Xenarthra (Mammalia) constituyen un grupo monofilético, caracterizado por una arquitectura esqueletaria particularmente distinta a la de los demás mamíferos placentarios. Su distribución actual es casi exclusivam...

Two biogeographical units are generally recognized in the present shelf area of Argentina: the Magellanian andArgentinian Provinces. The two provinces differ in their fossil record. The evolution of these provinces has b...