Results 1 to 10 of about 685 (102)

New age constraints on the Lower Jurassic Pliensbachian–Toarcian Boundary at Chacay Melehue (Neuquén Basin, Argentina) [PDF]

open access: yesScientific Reports, 2022
The Pliensbachian–Toarcian boundary interval is characterized by a ~ 3‰ negative carbon-isotope excursion (CIE) in organic and inorganic marine and terrestrial archives from sections in Europe, such as Peniche (Portugal) and Hawsker Bottoms, Yorkshire ...
Aisha H. Al-Suwaidi   +10 more
doaj   +2 more sources

A new pentatomoid bug from the Ypresian of Patagonia, Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2016
A new pentatomoid heteropteran, Chinchekoala qunita gen. et sp. nov. is described from the lower Eocene of Laguna del Hunco, Patagonia, Argentina. The new genus is mainly characterised by cephalic characters such as the mandibular plates surpassing the
Julián F. Petrulevičius
doaj   +6 more sources

Biostratigraphic significance of the latest Cambrian-earliest Ordovician agnostoid trilobites from Northwestern Argentina [PDF]

open access: yesGeologica Acta, 2003
The biostratigraphic significance of the latest Cambrian-earliest Ordovician trilobite agnostoids from northwestern Argentina is summarized. A characterization of the faunas recognized below and above the Cambrian-Ordovician boundary is presented on the ...
M.F. Tortello
doaj   +6 more sources

Totoralia, a new conical-shaped mollusk from the middle Cambrian of western Argentina [PDF]

open access: yesGeologica Acta, 2011
The new genus Totoralia from the late middle Cambrian of El Totoral (Mendoza Province, western Argentina) is described herein. It is a delicate, high, bilaterally symmetrical cone with a sub-central apex and five to seven prominent comarginal ...
M.F. TORTELLO, N.M. SABATTINI
doaj   +7 more sources

Fossils from the Middle Jurassic of China shed light on morphology of Choristopsychidae (Insecta, Mecoptera). [PDF]

open access: yesZookeys, 2013
Choristopsychidae, established by Martynov in 1937 with a single isolated forewing, is a little known extinct family in Mecoptera. Since then, no new members of this enigmatic family have been described. Based on 23 well-preserved specimens with complete
Qiao X   +3 more
europepmc   +7 more sources

Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) [PDF]

open access: yesGeologica Acta, 2011
Massive grey limestone blocks containing a fairly diverse but poorly preserved archaeocyath fauna were recovered from a meta-conglomerate bed in the El Jagüelito Formation (Sierra Grande area, Eastern North Patagonian Massif, Río Negro, Argentina).
P.D. GONZÁLEZ   +2 more
doaj   +6 more sources

Los camélidos fósiles del sitio Toca da Esperança, Bahia, Brasil [PDF]

open access: yesBoletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2006
El sitio Toca da Esperança, Bahia, es un yacimiento paleontológico que presenta restos de camélidos fósiles com datación del Pleistoceno Medio, entre 295,000 y 250,000 años A.P.
Alfredo José Altamirano
doaj   +2 more sources

La paleontología de invertebrados en la Revista del Museo de La Plata: 1891-2018

open access: yesRevista del Museo de La Plata, 2022
El número y contenido de los trabajos sobre Paleontología de Invertebrados publicados por la Revista del Museo de La Plata (RMLP) se correlaciona directamente con el desarrollo de la disciplina en el contexto institucional. Se diferencian cuatro épocas:
Alberto C. Riccardi
doaj   +1 more source

A new burmagomphid dragonfly from the Eocene of Patagonia, Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2017
A new burmagomphid anisopteran, Satelitala soberana gen. et sp. nov. is described from the lower Eocene of Laguna del Hunco, Patagonia, Argentina. The new genus is characterised by hindwing characters such as the subdiscoidal triangle not elongated; anal
Julián F. Petrulevičius
doaj   +1 more source

Remarks on the Tithonian- Berriasian ammonite biostratigraphy of west central Argentina [PDF]

open access: yes, 2015
Fil: Riccardi, Alberto Carlos. División Paleozoología Invertebrados. Facultad de Ciencias Naturales y Museo.
Riccardi, Alberto Carlos
core   +2 more sources

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