Results 1 to 10 of about 46,440 (188)

Pre-Carpels from the Middle Triassic of Spain. [PDF]

open access: yesPlants (Basel), 2022
In stark contrast to the multitude of hypotheses on carpel evolution, there is little fossil evidence testing these hypotheses. The recent discovery of angiosperms from the Early Jurassic makes the search for precursors of angiosperm carpels in the Triassic more promising. Our light microscopic and SEM observations on Combina gen.
Santos AA, Wang X.
europepmc   +5 more sources

Mesozoic Coleopteran Faunas from Argentina: Geological Context, Diversity, Taphonomic Observations, and Comparison with Other Fossil Insect Records [PDF]

open access: yesPsyche: A Journal of Entomology, 2012
The order Coleoptera is the most diversified group of the Class Insecta and is the largest group of the Animal Kingdom. This contribution reviews the Mesozoic insects and especially the coleopteran records from Argentina, based on bibliographical and ...
María Belén Lara   +2 more
doaj   +3 more sources

Diverse growth rates in Triassic archosaurs-insights from a small terrestrial Middle Triassic pseudosuchian. [PDF]

open access: yesNaturwissenschaften
AbstractThe small pseudosuchian Benggwigwishingasuchus eremacarminis was found in Anisian (Middle Triassic) marine sediments. Neither the skeleton nor osteohistology or microanatomy shows any secondary aquatic adaptations, and a dominantly terrestrial lifestyle of this new taxon is evident. Bone tissue consists of a scaffold of parallel-fibered matrix,
Klein N.
europepmc   +3 more sources

The anatomy and phylogenetic position of the erythrosuchid archosauriform Guchengosuchus shiguaiensis from the earliest Middle Triassic of China [PDF]

open access: yesPeerJ, 2019
Erythrosuchidae is a clade of early archosauriform reptiles, which were apex predators in many late Early and Middle Triassic ecosystems, following the Permo-Triassic mass extinction.
Richard J. Butler   +4 more
doaj   +3 more sources

The smallest tetrapod from the Middle Triassic of South America: a new procolophonoid parareptile from the Ladinian of Southern Brazil [PDF]

open access: yesScientific Reports
The Middle Triassic fossil record of South American parareptiles is scarce, with only a few procolophonoid specimens known. Here, we describe Sauropia macrorhinus gen. et sp.
Rodrigo T. Müller   +3 more
doaj   +2 more sources

Fuyuanichthys wangi gen. et sp. nov. from the Middle Triassic (Ladinian) of China highlights the early diversification of ginglymodian fishes [PDF]

open access: yesPeerJ, 2018
A series of well-preserved fossil assemblages from the Middle Triassic marine rock succession in Southwest China provide unique evidences for studying the early evolution of holostean fishes, including Halecomorphi (e.g., bownfin) and Ginglymodi (e.g ...
Guang-Hui Xu, Xin-Ying Ma, Yi Ren
doaj   +3 more sources

Calcareous Nannofossils in Middle Triassic (Anisian)-A preliminary note

open access: yesGeologija, 1991
In this note nannofossils of Anisian age are reported in a Middle Triassic flysch sequence in southern Montenegro (Dinarides). The rich and various nannofossils are largely different from those described either in Paleozoic-Upper Triassic or in younger ...
Paola De Capoa, Rajka Radoičić
doaj   +4 more sources

A new Early Triassic crinoid from Nevada questions the origin and palaeobiogeographical history of dadocrinids [PDF]

open access: yesActa Palaeontologica Polonica, 2023
Knowledge of the early evolution of post-Palaeozoic crinoids mainly relies on the well-preserved and abundant material sampled in Triassic Konservat-Lagerstätten such as those from the Anisian Muschelkalk (Middle Triassic) of the Germanic Basin.
THOMAS SAUCÈDE   +8 more
doaj   +1 more source

A Hiatus Obscures the Early Evolution of Modern Lineages of Bony Fishes

open access: yesFrontiers in Earth Science, 2021
About half of all vertebrate species today are ray-finned fishes (Actinopterygii), and nearly all of them belong to the Neopterygii (modern ray-fins). The oldest unequivocal neopterygian fossils are known from the Early Triassic.
Carlo Romano
doaj   +1 more source

Middle Triassic Paleosols and paleoclimate of Antarctica [PDF]

open access: yesJournal of Sedimentary Research, 1998
The Lashly Formation in the Allan Hills of southern Victoria Land, Antarctica, is now at a latitude of 768S and during the Middle Triassic was at least 708S. The combined evidence of fossil roots and soils indicates a paleoclimate unusual for such a high latitude.
Retallack, G.J.   +1 more
openaire   +4 more sources

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