Results 51 to 60 of about 20,372 (184)

First occurrence of a new Ocruranus-like helcionelloid mollusc from the lower Cambrian of East Gondwana [PDF]

, 2012
A new cap-shaped mollusc, Emargimantus angulatus gen. et sp. nov. is described from the Arrowie Basin of South Australia. The new species is closely comparable to mollusc species from South China and North-East Greenland previously described under the ...
Brock, Glenn A.,, Brock, Glenn A., Christian B. Skovsted, Topper, Timothy P., Timothy P. Topper, Skovsted, Christian B., Skovsted, Christian, Glenn A. Brock, Topper, Timothy Paul, Skovsted, Christian B.,, Topper, Timothy P.,, Skovsted, Christian,   +11 more
core   +1 more source

Taxonomic and anatomical comments on “Traversodon(?) major” von Huene, 1936 (Cynodontia) from the Middle Triassic of Brazil

The Anatomical Record, EarlyView.
Abstract Traversodontids were diverse non‐mammaliaform cynodonts that occupied herbivorous and omnivorous niches during the Middle and Late Triassic. In Brazil, they are particularly well represented in the Santa Maria Supersequence, although the taxonomic status of some historically described taxa remains uncertain.
Leonardo Kerber, Ingmar Werneburg
wiley   +1 more source

Coniferophytes from the Bajo de Veliz Formation (Gzhelian-Asselian), San Luis Province, Argentina

Acta Palaeobotanica
In this contribution, we analyze the presence of fossil coniferophytes from the Bajo de Veliz Formation (Paganzo Basin) that were initially referred to Walchia or Paranocladus and have not been described until now.
Johana Antonella Fernandez, Silvia Nélida Césari, Jorge Orlando Chiesa   +2 more
doaj   +1 more source

Isometry in mesosaurs: Implications for growth patterns in early amniotes

Acta Palaeontologica Polonica, 2022
Mesosaurs were small amphibious tetrapods that lived in western Gondwana during the early Permian or even earlier, when temperate Carboniferous–Permian conditions initiated after the glaciations that affected the southern region of Pangea.
PABLO NÚÑEZ DEMARCO, JORGE FERIGOLO, GRACIELA PIÑEIRO   +2 more
doaj   +1 more source

Hot and cold deserts as eco‐evolutionary arenas for understanding plant resistance to multiple abiotic stressors

Biological Reviews, EarlyView.
ABSTRACT During their long evolutionary history, land plants have evolved a range of adaptations to different abiotic stressors. These help explain present‐day diversity and distribution patterns, as well as the potential resilience of natural and agricultural systems to a changing climate. Most previous research has focused on adaptation to individual
Marc Fradera‐Soler, Natasha Barbolini, Anže Žerdoner Čalasan, Marian Schubert, Catarina Rydin, Olwen M. Grace, Aelys M. Humphreys   +6 more
wiley   +1 more source

Equinodermos del Cámbrico de España: situación actual de las investigaciones y perspectivas futuras

Estudios Geologicos, 2011
En este trabajo se presenta una revisión histórica de todos los equinodermos cámbricos descubier tos en España, desde su primer hallazgo a finales del siglo XIX y las técnicas actuales que se utilizan para su estudio. El muestreo sistemático de nuevas
S. Zamora
doaj   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Pterosaur teeth from the Southern Neuquén Basin (Patagonia, Argentina): New insights on the reconstruction of ornithocheiriform dental anatomy [PDF]

Acta Palaeontologica Polonica
The pterosaur fossil record of Argentina is increasing in recent times, both in the number of localities and their temporal range. The new materials are found in levels that span from the Late Triassic to the Late Cretaceous in age.
ALESSIO CIAFFI, FLAVIO BELLARDINI
doaj   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

A Tight fit-Early Mesozoic Gondwana, a Plate Reconstruction Perspective [PDF]

, 1998
P(論文)Gondwana, with East Antarctica as its center, began to break up during Late Triassic to Early Jurassic time. Use of the satellite derived gravity map to approximate the ocean-continent boundary allows us to generate a much tighter fit for the ...
Gahagan,Lisa M., Lawver,Lawrence A., Dalziel,Ian W.D.   +2 more
core