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Mostrando ítems 11-20 de 28
Acritarchs and prasinophytes from Amazonas Silurian basin: a good tool for the Trombetas Group biostratigraphic calibrationAcritarcos e prasinófitas do Siluriano da bacia do Amazonas: um poderoso auxílio na calibração bioestratigráfica do Grupo Trombetas
(Centro de Ciências Matemáticas e da Natureza, Instituto de Geociências, Universidade Feder, 2005)
The orthocerid Dawsonoceras? (Nautiloidea) from the Lipeón Formation (Silurian, Northwestern Argentina)
(Asociación Paleontológica Argentina, 2008-12)
Turic et al. (1982) erected the name "Rectogloma" zaplensis for a problematic fossil found at Las Capillas River, 20 km northeast of San Salvador de Jujuy city (figure 1). The fossil was collected from beds belonging to ...
The first record of Hirnantian Ostracoda in South America: Implications for the biostratigraphy and paleozoogeography of the Paraná basin
(2021-01-01)
Herein is reported the first occurrence of ostracodes from the Iapó Formation, an uppermost Ordovician unit of the Rio Ivaí Group in the Paraná basin, Brazil. Two ostracode species were identified in the Três Barras Farm ...
New biostratigraphic proposal for the lower palaeozoic tucunuco group (San Juan precordillera, Argentina) based on marine and terrestrial palynomorphs
(Asociacion Paleontologica Argentina, 2015-02)
This is an exhaustive analysis of the palynomorph assemblages, organic-walled marine phytoplankton and miospores from the Tucunuco Group. This group includes the La Chilca and Los Espejos formations and is exposed in the ...
Early Silurian (Rhuddanian) brachiopods from the Argentine Precordillera and their biogeographic affinitiesBraquiópodos del Silúrico temprano (Rhudaniano) de la precordillera argentina y sus afinidades biogeográficas
(Asociacion Paleontologica Argentina, 2009-05)
A brachiopod fauna dominated by Hindella crassa (J. de C. Sowerby), and also including an indeterminate pseudolinguloid, Leangella (Leangella) america sp. nov., Eoplectodonta (Eoplectodonta) duplicata (J. de C. Sowerby), ...
Cambrian, Ordovician and Silurian non-stromatoporoid Porifera
(Lyell collection, 2013-07)
The Cambrian, Ordovician and Silurian distributions of non-stromatoporoid sponges are reviewed. The earliest Cambrian faunas contain mostly hexactinellids, with protomonaxonids dominating middle Cambrian assemblages. There ...
Discovery of Silurian sponge spicules from the Argentine Precordillera
(Wiley, 2011-12-06)
An association of silicified spicules of hexactinellid sponges was collected from Silurian sandstones at the top of the La Chilca Formation, cropping out at Cerro del Fuerte, 20 km east of Jáchal, in the San Juan Precordillera ...