English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. In 1887, Carlos Ameghino carried out the first geological and paleontological expedition to the Rio Santa Cruz (RSC), Patagonia, Argentina. Between 1887 and 1889, Florentino Ameghino studied the fossils obtained by Carlos, founding more than 120 taxa and establishing his Formacion Santacrucena and Piso Santacruceno . In 1888, F. Ameghino was exonerated from the Museo de La Plata and replaced by Alcides Mercerat in 1889, starting a strong competition for the Santacrucian fossils, which since 1890 were obtained mainly on the Atlantic coast. Until 1894, Ameghino and Mercerat founded more than 500 mammal species, of which 80% correspond to Ameghino who, later, synonymized almost all Mercerat species. At the end of the 19 th century, foreign explorers visited Patagonia, but they did not collect in the RSC. So the largest RSC collections were made until 1889. The Santacrucian collections of the 19 th century have vague and in some cases contradictory geographical information. This is true for the Santacrucian species reassigned by F. Ameghino to the Notohippidian, an association that he located northwest of the RSC. Recent analyses show that several of these specimens were collected southwest of the RSC. These and other facts demonstrate the inconvenience of using the data from the old collections in biostratigraphic and paleoecological studies without a critical analysis of the history of their provenance. Since 2003, a research program was launched that promoted biostratigraphic and paleoecological studies of the Santa Cruz Formation (SCF). This Thematic Volume compiles contributions on geology, stratigraphy, taxonomy, and mammal association’s analyses of the SCF along the RSC. Key words . Santacrucian. Notohippidian. Fossil mammals. Taxonomy. Ameghino.  Resumen . ANTECEDENTES HISTORICOS PARA UNA REVISION DE LA PALEONTOLOGIA DE LA FORMACION SANTA CRUZ (MIOCENO TEMPRANO– MEDIO) A LO LARGO DEL RIO SANTA CRUZ, PATAGONIA, ARGENTINA. En 1887, Carlos Ameghino realizo la primera expedicion geologica y pa- leontologica al Rio Santa Cruz (RSC), Patagonia, Argentina. Entre 1887 y 1889, Florentino Ameghino estudio los fosiles obtenidos por Carlos, con los que fundo mas de 120 taxones y establecio su Formacion Santacrucena y Piso Santacruceno. En 1888, F. Ameghino fue exonerado del Museo de La Plata y reemplazado por Alcides Mercerat en 1889, iniciandose una fuerte competencia por los fosiles santacrucenses. A partir de 1890 estos fueron recolectados principalmente en la costa atlantica. Hasta 1894 Ameghino y Mercerat fundaron mas de 500 especies de mamiferos, 80% de las cuales le correspondian a Ameghino quien, posteriormente, sinonimizaria casi todas las especies de Mercerat. A fines del siglo XIX exploradores extranjeros recorrieron Patagonia, pero casi no recolectaron en el RSC. Asi, las principales colecciones del rio se realiza- ron hasta 1889. Las colecciones santacrucenses del siglo XIX poseen informacion geografica vaga y hasta contradictoria. Asi sucede con las especies del Santacrucense reasignadas por Ameghino al Notohippidense, asociacion por el ubicada al noroeste del RSC. Analisis recientes evidencian que varios de esos ejemplares fueron recolectados al suroeste del RSC. Estas y otras evidencias prueban la inconveniencia de utilizar los datos de las viejas colecciones sin un analisis critico de la historia de su procedencia. Desde 2003 se inicio un programa de investigacion que impulso estudios bioestratigraficos y paleoecologicos en la Formacion Santa Cruz (FSC). Este Volumen Tematico reune contribuciones sobre geologia, estratigrafia, taxonomia y analisis de asociaciones de mamiferos de la FSC en el RSC. Palabras clave . Santacrucense. Notohippidense. Mamiferos fosiles. Taxonomia. Ameghino.

publicación electrónica de la asociación paleontológica argentina

HISTORICAL BACKGROUND FOR A REVISION OF THE PALEONTOLOGY OF THE SANTA CRUZ FORMATION (EARLY-MIDDLE MIOCENE) ALONG THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA