Buscar
Mostrando ítems 1-10 de 21
First record of Early Devonian (Lochkovian) flora from the Santa Rosa Formation - Alarache, Southern Bolivia
(Universidad de Barcelona, 2008-12)
New information on plants and palynomorphs from Angosto de Alarache, South Bolivia, is presented. The plant remains appear at the base of the section. Dichotomizing sterile forms are assigned to Hostinella sp. and scarce ...
Land plants in the Devonian Villavicencio formation, Mendoza Province, Argentina
(Elsevier Science, 2001-02)
Plant assemblages are described from two localities, San Isidro Creek and Vaqueria, in the marine basal Devonian Villavicencio Formation in Mendoza Province, the Argentine Precordillera. Abundant smooth and more rarely ...
New palynological information from the subsurface Copo, Caburé and Rincón formations (upper Lochkovian-Emsian), Salta Province, Argentina
(Association of Australasian Palaeontologists, 2013-09)
New palynological information recovered from cutting and core samples from the Puesto El Tigre x-1 well in northwestern Argentina is presented. The studied interval corresponds to the Copo, Cabure and Rinc n formations. ...
A revision of the first Asteropyginae (Trilobita; Devonian)
(Elsevier France-editions Scientifiques Medicales Elsevier, 2014-09)
A recent cladistic analysis of the Asteropyginae led to the recognition of the genus Minicryphaeus as one of the most ancestral of this subfamily. A new species, M.giganteus, is described here from the Ihandar Formation ...
Inferring ancestral range reconstruction based on trilobite records: a study-case on Metacryphaeus (Phacopida, Calmoniidae)
(2018-12-01)
Metacryphaeus is a calmoniid trilobite genus from the Devonian Malvinokaffric Realm, exclusive to the Gondwanan regions. It includes eleven species, which are for the first time included here in a single phylogenetic ...
Palynological record of the Silurian/Devonian boundary in the Argentine Precordillera, western Gondwana
(E Schweizerbartsche Verlags, 2014-10)
The palynological assemblages of the upper part of the Los Espejos Formation and the lower part of the Talacasto Formation, in the northern outcrops of San Juan Precordillera, Argentina, were studied. This section spans ...
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 ...
The new genus Talacastospongia: insights on the first record of a Devonian sponge from South America
(Paleontological Society, 2015-12)
The Lower Devonian (Lochkovian) hexactinellid sponge Talacastospongia minima n. gen. n. sp., is reported from the lower beds of the Talacasto Formation in the Argentine Precordillera. It represents the first Devonian ...
Early Devonian trilobites from the Sierra de Las Minitas, northernmost Precordillera (La Rioja province), Argentina
(Asociacion Paleontologica Argentina, 2011-06)
Early Devonian trilobites are described based on material from Sierra de Las Minitas, in the northern extent of the Precordillera, western Argentina. This diverse fauna, the first one known from La Rioja Province, includes ...
The phacopid trilobite Echidnops taphomimus n. sp. from the Lower Devonian of Argentina: Insights into infaunal molting, eye architecture and geographic distribution
(Paleontological Society, 2016-11)
Some Silurian-Devonian Argentinian trilobites characterized by infaunal behavior during molting are considered. After a taxonomic reappraisal, a species previously referred to a lineage of the phacopid Paciphacops is ...